Journal articles on the topic 'Harpe – Vibrations'

Environmental sonification of rainfall events using large-scale long wire instruments is presented. After a brief historical introduction of long wires and their relationship to the Aeolian harp, some aspects of construction and recording techniques are discussed. Observations of rainfall-induced vibrations on long wire audio recordings are then presented.

Elegantly poised over the Mobile River, the twin pylons and the semi-harped cable stays of the Cochrane Bridge subtly complement the vast and undulating landscape of the Mobile Bay as the bridge carries US Route 90 over the Mobile River in Alabama. In February 1998, light rain drizzled on the bridge, and a weather station nearby recorded wind speeds of about 48 km/h (30 mph). Under these seemingly mild weather conditions, the normally immobile cable stays started to vibrate, and within moments, these nascent vibrations reached amplitudes of more than 1.2 m (4 ft). Alarmed by this event, the Alabama Department of Transportation (ALDOT) took immediate action to ensure the continued safety and serviceability of the bridge. A team of consultants was selected by ALDOT to investigate mitigation measures for the large-amplitude cable-stay vibrations. The fast-tracked comprehensive program planned and implemented to inspect, test, document, and evaluate the effects of the large-amplitude vibrations and the recommendation of retrofit measures that would limit future occurrences of such cable-stay vibrations on the Cochrane Bridge are described in detail.

Evolution of dominant frequencies in songs of Eneopterinae crickets was studied with respect to phylogeny. Two characters are optimized on the tree: the first describes the frequency resulting from the vibration of the harp (Fda), and the second is due to the vibration of other tegminal areas (Fdb). Fda was found to be relatively stable through the subfamily. Its low ancestral state is replaced by a high Fda only once, resulting in high-frequency calling in [Cardiodactylus (Lebinthus-Agnotecous)]. A high Fdb component is added to the low ancestral Fda in Eneoptera guyanensis, resulting in frequency modulation. The onset of high Fd in this first subclade is accompanied by a high cladogenesis rate, which supports a hypothesis of adaptive radiation for high frequencies. The effectiveness of high-frequency calling is discussed in relation to the species behavior ecology.

Fluid-filled shells are near-ubiquitous in natural and engineered structures—a familiar example is that of glass harps comprising partially filled wineglasses or glass bowls, whose acoustic properties are readily noticeable. Existing theories modelling the mechanical properties of such systems under vibrational load either vastly simplify shell geometry and oscillatory modal shapes to admit analytical solutions or rely on finite-element black-box computations for general cases, the former yielding poor accuracy and the latter offering limited tractability and physical insight. In the present study, we derive a theoretical framework encompassing elastic shell deformation with structural and viscous dissipation, accommodating arbitrary axisymmetric shell geometries and fluid levels; reductions to closed-form solutions under specific assumptions are shown to be possible. The theory is extensively verified against a range of geometries, fluid levels and fluid viscosities in experiments; an extension of the model encompassing additional solid objects within the fluid-filled shell is also considered and verified. The presented theoretical advance in describing vibrational response is relevant in performance evaluation for engineered structures and quality validation in manufacturing.

During burrow digging by the mole cricket Scapteriscus acletus Rehn and Hubbard, the burrow is enlarged and shaped in a series of digging cycles, each lasting 1–2min, and song chirps are produced after every cycle. The song becomes up to 18 dB louder and acoustically purer during burrow building. The shape of the song pulse envelope changes so that its average power density becomes greater and its build-up and decay become more gradual. The forewings show a single resonance of the harp (Cu 1 cell) regions at 2.5-3.0 kHz: the normal song carrier frequency is 2.5-2.7kHz. Removal of the outer parts of the forewings does not affect the radiated sound power. The singing burrow has an exponential horn opening at the soil surface and an internal bulb. The calculated cut-off frequency of the horn is 1–34 kHz and that of the first resonance is 2.5-2.7 kHz. The volume of the bulb is close to that required to tune the throat: obliteration of the burrow bulb causes a substantial decrease in the radiated sound pressure levels before singing ceases. The horn mouth acts as a finite sound source, with large acoustic reactance. The acoustics of the burrow were measured with a small doublet source inserted at the position at which the cricket sings. At this position, the burrow resonates at 2.75-3 kHz, with a quality factor (Q), measured both by the - 3 dB bandwidth and by the build-up and decay of tone bursts, of 2.5-2.7. The sound pressure produced by the doublet source is up to 24 dB louder when it is in the burrow than when it is in free air. Further in or out from the insect's singing position, the effective gain of the burrow is reduced and other resonances and anti-resonances are observed. Obliteration of the burrow bulb reduces the effective gain of the burrow by 6–10 dB and the burrow ceases to resonate at 2.75 kHz. It is proposed that the tuned burrow acts as a resistive load on the vibrating harps, so allowing good coupling between the small wings and the surrounding medium while allowing a pure carrier frequency to be radiated.

Kirtan is a musical worship practice from India that involves the congregational performance of sacred chants and mantras in call-and-response format. The style of kirtan performed within Gaudiya Vaishnava Hinduism is an expression of Bhakti Yoga, “the yoga of love and devotion”, and focuses on creating a personal, playful, and emotionally intense connection between the worshipper and their god—specifically, through words and sounds whose vibration is believed to carry the literal presence of Krishna. Kirtan is one of many Indian genres that uses musical techniques to move participants through a progression of spiritual states from meditation to ecstasy. Kirtan-singing has become internationally popular in recent decades, largely thanks to the efforts of the Hare Krishna movement, which has led to extensive hybridization of musical styles and cultural approaches to kirtan adapted to the needs of a diasporic, globalized community of worshippers. This essay explores the practice of kirtan in the United States through interviews, fieldwork, and analysis of recordings made at several Krishna temples and festivals that demonstrate the musical techniques that can be spontaneously deployed in acts of collective worship in order to create intense feelings of deep, focused meditation and uninhibited, expressive bliss.

The IUPAC Conference on Physical Organic Chemistry (ICPOC) series of biennial conferences has a long history as the leading international meeting on physical organic chemistry. From its first installment in Crans sur Sierre (Switzerland) in 1972, ICPOC has acted as a focus point for the physical organic community worldwide, and the conference series enjoys a respected international reputation. With its focus on relating chemical behavior and properties to molecular structure through the development of (ideally quantitative) understanding of structure–property relationships, physical organic chemistry (POC) finds wide application in tackling current scientific challenges and has been undergoing something of a resurgence in recent years. ICPOC-21, held on 9-13 September 2012 at the University of Durham, UK, provided a forum for researchers (329 delegates from 38 countries) in academia and industry, and at all career stages, to present their results to the POC community and to exchange ideas, meet old friends, and make new contacts while enjoying spectacular views of the World Heritage castle and cathedral. In line with a developing interpretation of POC as a widely applicable approach to chemistry, the scientific program embraced three broad themes (physical underpinnings, mechanism and catalysis, and supramolecular chemistry) but often these strands were as inseparably interconnected as the three leaves held in unity in the minimal saddle trefoil adopted as the conference logo. The scope of the meeting is illustrated by the selection of contributions included in this issue of Pure and Applied Chemistry. In addition to the 24 plenary and keynote lectures, there were 120 contributed talks and 141 poster presentations. Donna Blackmond's paper on the interplay of thermodynamics and kinetics in dictating organocatalytic reactivity and selectivity demonstrates the use of kinetic modeling to provide mechanistic understanding leading to practical application. Martin Tanner's discussion of rearrangements catalyzed by indole alkaloid prenyltransferases shows how the experimental POC approach may shed light on enzyme mechanisms, while Dean Tantillo describes the application of quantum chemical dynamics calculations to mechanistic problems in the field of terpene biosynthesis, and a blend of experiment and computation is presented in Brian Ohta's account of the structure of halonium ions in superacidic solutions. Hiromitsu Maeda reviews research on various stimuli-responsive circularly polarized luminescence properties derived from π-conjugated molecules and related materials, and Jason Harper summarizes progress towards a predictive understanding of how ionic solvents affect and control organic reactivity. Finally, Izumi Iwakura reports directly observations of the Claisen rearrangement by timeresolved vibrational spectroscopy using a few-optical-cycle pulse laser. This selection of excellent work provides only a taste, but the conference as a whole showed that the international POC community is as vital and vibrant as it has ever been, promising exciting times ahead for this approach to chemistry. The next ICPOC will be held in Ottawa (Canada) 10-15 August 2014 under the chairmanship of Prof. Paul Mayer (University of Ottawa). Further information can be found at http://events.science.uottawa. ca/icpoc22/welcome.html.Ian H. Williams Conference Chair and Editor

The clever designs of natural transducers are a great source of inspiration for man-made systems. At small length scales, there are many transducers in nature that we are now beginning to understand and learn from. Here, we present an example of such a transducer that is used by field crickets to produce their characteristic song. This transducer uses two distinct components—a file of discrete teeth and a plectrum that engages intermittently to produce a series of impulses forming the loading, and an approximately triangular membrane, called the harp, that acts as a resonator and vibrates in response to the impulse-train loading. The file-and-plectrum act as a frequency multiplier taking the low wing beat frequency as the input and converting it into an impulse-train of sufficiently high frequency close to the resonant frequency of the harp. The forced vibration response results in beats producing the characteristic sound of the cricket song. With careful measurements of the harp geometry and experimental measurements of its mechanical properties (Young's modulus determined from nanoindentation tests), we construct a finite element (FE) model of the harp and carry out modal analysis to determine its natural frequency. We fine tune the model with appropriate elastic boundary conditions to match the natural frequency of the harp of a particular species—Gryllus bimaculatus. We model impulsive loading based on a loading scheme reported in literature and predict the transient response of the harp. We show that the harp indeed produces beats and its frequency content matches closely that of the recorded song. Subsequently, we use our FE model to show that the natural design is quite robust to perturbations in the file. The characteristic song frequency produced is unaffected by variations in the spacing of file-teeth and even by larger gaps. Based on the understanding of how this natural transducer works, one can design and fabricate efficient microscale acoustic devices such as microelectromechanical systems (MEMS) loudspeakers.

Abstract Background Animal mitochondria play a central role in energy production in the cells through the oxidative phosphorylation (OXPHOS) pathway. Recent studies of selection on different mitochondrial OXPHOS genes have revealed the adaptive implications of amino acid changes in these subunits. In hares, climatic variation and/or introgression were suggested to be at the origin of such adaptation. Here we looked for evidence of positive selection in three mitochondrial OXPHOS genes, using tests of selection, protein structure modelling and effects of amino acid substitutions on the protein function and stability. We also used statistical models to test for climate and introgression effects on sites under positive selection. Results Our results revealed seven sites under positive selection in ND4 and three sites in Cytb. However, no sites under positive selection were observed in the COX1 gene. All three subunits presented a high number of codons under negative selection. Sites under positive selection were mapped on the tridimensional structure of the predicted models for the respective mitochondrial subunit. Of the ten amino acid replacements inferred to have evolved under positive selection for both subunits, six were located in the transmembrane domain. On the other hand, three codons were identified as sites lining proton translocation channels. Furthermore, four codons were identified as destabilizing with a significant variation of Δ vibrational entropy energy between wild and mutant type. Moreover, our PROVEAN analysis suggested that among all positively selected sites two fixed amino acid replacements altered the protein functioning. Our statistical models indicated significant effects of climate on the presence of ND4 and Cytb protein variants, but no effect by trans-specific mitochondrial DNA introgression, which is not uncommon in a number of hare species. Conclusions Positive selection was observed in several codons in two OXPHOS genes. We found that substitutions in the positively selected codons have structural and functional impacts on the encoded proteins. Our results are concordantly suggesting that adaptations have strongly affected the evolution of mtDNA of hare species with potential effects on the protein function. Environmental/climatic changes appear to be a major trigger of this adaptation, whereas trans-specific introgressive hybridization seems to play no major role for the occurrence of protein variants.

augmentvb [ɔːgˈmɛnt]1. to make or become greater in number, amount, strength, etc.; increase2. Music: to increase (a major or perfect interval) by a semitone (Collins English Dictionary 107) Almost everything associated with Robert Johnson has been subject to some form of augmentation. His talent as a musician and songwriter has been embroidered by myth-making. Johnson’s few remaining artefacts—his photographic images, his grave site, other physical records of his existence—have attained the status of reliquary. Even the integrity of his forty-two surviving recordings is now challenged by audiophiles who posit they were musically and sonically augmented by speeding up—increasing the tempo and pitch. This article documents the promulgation of myth in the life and music of Robert Johnson. His disputed photographic images are cited as archetypal contested artefacts, augmented both by false claims and genuine new discoveries—some of which suggest Johnson’s cultural magnetism is so compelling that even items only tenuously connected to his work draw significant attention. Current challenges to the musical integrity of Johnson’s original recordings, that they were “augmented” in order to raise the tempo, are presented as exemplars of our on-going fascination with his life and work. Part literature review, part investigative history, it uses the phenomenon of augmentation as a prism to shed new light on this enigmatic figure. Johnson’s obscurity during his lifetime, and for twenty-three years after his demise in 1938, offered little indication of his future status as a musical legend: “As far as the evolution of black music goes, Robert Johnson was an extremely minor figure, and very little that happened in the decades following his death would have been affected if he had never played a note” (Wald, Escaping xv). Such anonymity allowed those who first wrote about his music to embrace and propagate the myths that grew around this troubled character and his apparently “supernatural” genius. Johnson’s first press notice, from a pseudonymous John Hammond writing in The New Masses in 1937, spoke of a mysterious character from “deepest Mississippi” who “makes Leadbelly sound like an accomplished poseur” (Prial 111). The following year Hammond eulogised the singer in profoundly romantic terms: “It still knocks me over when I think of how lucky it is that a talent like his ever found its way to phonograph records […] Johnson died last week at precisely the moment when Vocalion scouts finally reached him and told him that he was booked to appear at Carnegie Hall” (19). The visceral awe experienced by subsequent generations of Johnson aficionados seems inspired by the remarkable capacity of his recordings to transcend space and time, reaching far beyond their immediate intended audience. “Johnson’s music changed the way the world looked to me,” wrote Greil Marcus, “I could listen to nothing else for months.” The music’s impact originates, at least in part, from the ambiguity of its origins: “I have the feeling, at times, that the reason Johnson has remained so elusive is that no one has been willing to take him at his word” (27-8). Three decades later Bob Dylan expressed similar sentiments over seven detailed pages of Chronicles: From the first note the vibrations from the loudspeaker made my hair stand up … it felt like a ghost had come into the room, a fearsome apparition …When he sings about icicles hanging on a tree it gives me the chills, or about milk turning blue … it made me nauseous and I wondered how he did that … It’s hard to imagine sharecroppers or plantation field hands at hop joints, relating to songs like these. You have to wonder if Johnson was playing for an audience that only he could see, one off in the future. (282-4) Such ready invocation of the supernatural bears witness to the profundity and resilience of the “lost bluesman” as a romantic trope. Barry Lee Pearson and Bill McCulloch have produced a painstaking genealogy of such a-historical misrepresentation. Early contributors include Rudi Blesch, Samuel B Charters, Frank Driggs’ liner notes for Johnson’s King of the Delta Blues Singers collection, and critic Pete Welding’s prolific 1960s output. Even comparatively recent researchers who ostensibly sought to demystify the legend couldn’t help but embellish the narrative. “It is undeniable that Johnson was fascinated with and probably obsessed by supernatural imagery,” asserted Robert Palmer (127). For Peter Guralnick his best songs articulate “the debt that must be paid for art and the Faustian bargain that Johnson sees at its core” (43). Contemporary scholarship from Pearson and McCulloch, James Banninghof, Charles Ford, and Elijah Wald has scrutinised Johnson’s life and work on a more evidential basis. This process has been likened to assembling a complicated jigsaw where half the pieces are missing: The Mississippi Delta has been practically turned upside down in the search for records of Robert Johnson. So far only marriage application signatures, two photos, a death certificate, a disputed death note, a few scattered school documents and conflicting oral histories of the man exist. Nothing more. (Graves 47) Such material is scrappy and unreliable. Johnson’s marriage licenses and his school records suggest contradictory dates of birth (Freeland 49). His death certificate mistakes his age—we now know that Johnson inadvertently founded another rock myth, the “27 Club” which includes fellow guitarists Brian Jones, Jimi Hendrix and Kurt Cobain (Wolkewitz et al., Segalstad and Hunter)—and incorrectly states he was single when he was twice widowed. A second contemporary research strand focuses on the mythmaking process itself. For Eric Rothenbuhler the appeal of Johnson’s recordings lies in his unique “for-the-record” aesthetic, that foreshadowed playing and song writing standards not widely realised until the 1960s. For Patricia Schroeder Johnson’s legend reveals far more about the story-tellers than it does the source—which over time has become “an empty center around which multiple interpretations, assorted viewpoints, and a variety of discourses swirl” (3). Some accounts of Johnson’s life seem entirely coloured by their authors’ cultural preconceptions. The most enduring myth, Johnson’s “crossroads” encounter with the Devil, is commonly redrawn according to the predilections of those telling the tale. That this story really belongs to bluesman Tommy Johnson has been known for over four decades (Evans 22), yet it was mistakenly attributed to Robert as recently as 1999 in French blues magazine Soul Bag (Pearson and McCulloch 92-3). Such errors are, thankfully, becoming less common. While the movie Crossroads (1986) brazenly appropriated Tommy’s story, the young walking bluesman in Oh, Brother, Where Art Thou? (2000) faithfully proclaims his authentic identity: “Thanks for the lift, sir. My name's Tommy. Tommy Johnson […] I had to be at that crossroads last midnight. Sell my soul to the devil.” Nevertheless the “supernatural” constituent of Johnson’s legend remains an irresistible framing device. It inspired evocative footage in Peter Meyer’s Can’t You Hear the Wind Howl? The Life and Music of Robert Johnson (1998). Even the liner notes to the definitive Sony Music Robert Johnson: The Centennial Edition celebrate and reclaim his myth: nothing about this musician is more famous than the word-of-mouth accounts of him selling his soul to the devil at a midnight crossroads in exchange for his singular mastery of blues guitar. It has become fashionable to downplay or dismiss this account nowadays, but the most likely source of the tale is Johnson himself, and the best efforts of scholars to present this artist in ordinary, human terms have done little to cut through the mystique and mystery that surround him. Repackaged versions of Johnson’s recordings became available via Amazon.co.uk and Spotify when they fell out of copyright in the United Kingdom. Predictable titles such as Contracted to the Devil, Hellbound, Me and the Devil Blues, and Up Jumped the Devil along with their distinctive “crossroads” artwork continue to demonstrate the durability of this myth [1]. Ironically, Johnson’s recordings were made during an era when one-off exhibited artworks (such as his individual performances of music) first became reproducible products. Walter Benjamin famously described the impact of this development: that which withers in the age of mechanical reproduction is the aura of the work of art […] the technique of reproduction detaches the reproduced object from the domain of tradition. By making many reproductions it substitutes a plurality of copies for a unique existence. (7) Marybeth Hamilton drew on Benjamin in her exploration of white folklorists’ efforts to document authentic pre-modern blues culture. Such individuals sought to preserve the intensity of the uncorrupted and untutored black voice before its authenticity and uniqueness could be tarnished by widespread mechanical reproduction. Two artefacts central to Johnson’s myth, his photographs and his recorded output, will now be considered in that context. In 1973 researcher Stephen LaVere located two pictures in the possession of his half–sister Carrie Thompson. The first, a cheap “dime store” self portrait taken in the equivalent of a modern photo booth, shows Johnson around a year into his life as a walking bluesman. The second, taken in the Hooks Bros. studio in Beale Street, Memphis, portrays a dapper and smiling musician on the eve of his short career as a Vocalion recording artist [2]. Neither was published for over a decade after their “discovery” due to fears of litigation from a competing researcher. A third photograph remains unpublished, still owned by Johnson’s family: The man has short nappy hair; he is slight, one foot is raised, and he is up on his toes as though stretching for height. There is a sharp crease in his pants, and a handkerchief protrudes from his breast pocket […] His eyes are deep-set, reserved, and his expression forms a half-smile, there seems to be a gentleness about him, his fingers are extraordinarily long and delicate, his head is tilted to one side. (Guralnick 67) Recently a fourth portrait appeared, seemingly out of nowhere, in Vanity Fair. Vintage guitar seller Steven Schein discovered a sepia photograph labelled “Old Snapshot Blues Guitar B. B. King???” [sic] while browsing Ebay and purchased it for $2,200. Johnson’s son positively identified the image, and a Houston Police Department forensic artist employed face recognition technology to confirm that “all the features are consistent if not identical” (DiGiacomo 2008). The provenance of this photograph remains disputed, however. Johnson’s guitar appears overly distressed for what would at the time be a new model, while his clothes reflect an inappropriate style for the period (Graves). Another contested “Johnson” image found on four seconds of silent film showed a walking bluesman playing outside a small town cinema in Ruleville, Mississippi. It inspired Bob Dylan to wax lyrical in Chronicles: “You can see that really is Robert Johnson, has to be – couldn’t be anyone else. He’s playing with huge, spiderlike hands and they magically move over the strings of his guitar” (287). However it had already been proved that this figure couldn’t be Johnson, because the background movie poster shows a film released three years after the musician’s death. The temptation to wish such items genuine is clearly a difficult one to overcome: “even things that might have been Robert Johnson now leave an afterglow” (Schroeder 154, my italics). Johnson’s recordings, so carefully preserved by Hammond and other researchers, might offer tangible and inviolate primary source material. Yet these also now face a serious challenge: they run too rapidly by a factor of up to 15 per cent (Gibbens; Wilde). Speeding up music allowed early producers to increase a song’s vibrancy and fit longer takes on to their restricted media. By slowing the recording tempo, master discs provided a “mother” print that would cause all subsequent pressings to play unnaturally quickly when reproduced. Robert Johnson worked for half a decade as a walking blues musician without restrictions on the length of his songs before recording with producer Don Law and engineer Vincent Liebler in San Antonio (1936) and Dallas (1937). Longer compositions were reworked for these sessions, re-arranging and edited out verses (Wald, Escaping). It is also conceivable that they were purposefully, or even accidentally, sped up. (The tempo consistency of machines used in early field recordings across the South has often been questioned, as many played too fast or slow (Morris).) Slowed-down versions of Johnson’s songs from contributors such as Angus Blackthorne and Ron Talley now proliferate on YouTube. The debate has fuelled detailed discussion in online blogs, where some contributors to specialist audio technology forums have attempted to decode a faintly detectable background hum using spectrum analysers. If the frequency of the alternating current that powered Law and Liebler’s machine could be established at 50 or 60 Hz it might provide evidence of possible tempo variation. A peak at 51.4 Hz, one contributor argues, suggests “the recordings are 2.8 per cent fast, about half a semitone” (Blischke). Such “augmentation” has yet to be fully explored in academic literature. Graves describes the discussion as “compelling and intriguing” in his endnotes, concluding “there are many pros and cons to the argument and, indeed, many recordings over the years have been speeded up to make them seem livelier” (124). Wald ("Robert Johnson") provides a compelling and detailed counter-thesis on his website, although he does acknowledge inconsistencies in pitch among alternate master takes of some recordings. No-one who actually saw Robert Johnson perform ever called attention to potential discrepancies between the pitch of his natural and recorded voice. David “Honeyboy” Edwards, Robert Lockwood Jr. and Johnny Shines were all interviewed repeatedly by documentarians and researchers, but none ever raised the issue. Conversely Johnson’s former girlfriend Willie Mae Powell was visibly affected by the familiarity in his voice on hearing his recording of the tune Johnson wrote for her, “Love in Vain”, in Chris Hunt’s The Search for Robert Johnson (1991). Clues might also lie in the natural tonality of Johnson’s instrument. Delta bluesmen who shared Johnson’s repertoire and played slide guitar in his style commonly used a tuning of open G (D-G-D-G-B-G). Colloquially known as “Spanish” (Gordon 2002, 38-42) it offers a natural home key of G major for slide guitar. We might therefore expect Johnson’s recordings to revolve around the tonic (G) or its dominant (D) -however almost all of his songs are a full tone higher, in the key of A or its dominant E. (The only exceptions are “They’re Red Hot” and “From Four Till Late” in C, and “Love in Vain” in G.) A pitch increase such as this might be consistent with an increase in the speed of these recordings. Although an alternative explanation might be that Johnson tuned his strings particularly tightly, which would benefit his slide playing but also make fingering notes and chords less comfortable. Yet another is that he used a capo to raise the key of his instrument and was capable of performing difficult lead parts in relatively high fret positions on the neck of an acoustic guitar. This is accepted by Scott Ainslie and Dave Whitehill in their authoritative volume of transcriptions At the Crossroads (11). The photo booth self portrait of Johnson also clearly shows a capo at the second fret—which would indeed raise open G to open A (in concert pitch). The most persuasive reasoning against speed tampering runs parallel to the argument laid out earlier in this piece, previous iterations of the Johnson myth have superimposed their own circumstances and ignored the context and reality of the protagonist’s lived experience. As Wald argues, our assumptions of what we think Johnson ought to sound like have little bearing on what he actually sounded like. It is a compelling point. When Son House, Skip James, Bukka White, and other surviving bluesmen were “rediscovered” during the 1960s urban folk revival of North America and Europe they were old men with deep and resonant voices. Johnson’s falsetto vocalisations do not, therefore, accord with the commonly accepted sound of an authentic blues artist. Yet Johnson was in his mid-twenties in 1936 and 1937; a young man heavily influenced by the success of other high pitched male blues singers of his era. people argue that what is better about the sound is that the slower, lower Johnson sounds more like Son House. Now, House was a major influence on Johnson, but by the time Johnson recorded he was not trying to sound like House—an older player who had been unsuccessful on records—but rather like Leroy Carr, Casey Bill Weldon, Kokomo Arnold, Lonnie Johnson, and Peetie Wheatstraw, who were the big blues recording stars in the mid–1930s, and whose vocal styles he imitated on most of his records. (For example, the ooh-well-well falsetto yodel he often used was imitated from Wheatstraw and Weldon.) These singers tended to have higher, smoother voices than House—exactly the sound that Johnson seems to have been going for, and that the House fans dislike. So their whole argument is based on the fact that they prefer the older Delta sound to the mainstream popular blues sound of the 1930s—or, to put it differently, that their tastes are different from Johnson’s own tastes at the moment he was recording. (Wald, "Robert Johnson") Few media can capture an audible moment entirely accurately, and the idea of engineering a faithful reproduction of an original performance is also only one element of the rationale for any recording. Commercial engineers often aim to represent the emotion of a musical moment, rather than its totality. John and Alan Lomax may have worked as documentarians, preserving sound as faithfully as possible for the benefit of future generations on behalf of the Library of Congress. Law and Liebler, however, were producing exciting and profitable commercial products for a financial gain. Paradoxically, then, whatever the “real” Robert Johnson sounded like (deeper voice, no mesmeric falsetto, not such an extraordinarily adept guitar player, never met the Devil … and so on) the mythical figure who “sold his soul at the crossroads” and shipped millions of albums after his death may, on that basis, be equally as authentic as the original. Schroeder draws on Mikhail Bakhtin to comment on such vacant yet hotly contested spaces around the Johnson myth. For Bakhtin, literary texts are ascribed new meanings by consecutive generations as they absorb and respond to them. Every age re–accentuates in its own way the works of its most immediate past. The historical life of classic works is in fact the uninterrupted process of their social and ideological re–accentuation [of] ever newer aspects of meaning; their semantic content literally continues to grow, to further create out of itself. (421) In this respect Johnson’s legend is a “classic work”, entirely removed from its historical life, a free floating form re-contextualised and reinterpreted by successive generations in order to make sense of their own cultural predilections (Schroeder 57). As Graves observes, “since Robert Johnson’s death there has seemed to be a mathematical equation of sorts at play: the less truth we have, the more myth we get” (113). The threads connecting his real and mythical identity seem so comprehensively intertwined that only the most assiduous scholars are capable of disentanglement. Johnson’s life and work seem destined to remain augmented and contested for as long as people want to play guitar, and others want to listen to them. Notes[1] Actually the dominant theme of Johnson’s songs is not “the supernatural” it is his inveterate womanising. Almost all Johnson’s lyrics employ creative metaphors to depict troubled relationships. Some even include vivid images of domestic abuse. In “Stop Breakin’ Down Blues” a woman threatens him with a gun. In “32–20 Blues” he discusses the most effective calibre of weapon to shoot his partner and “cut her half in two.” In “Me and the Devil Blues” Johnson promises “to beat my woman until I get satisfied”. However in The Lady and Mrs Johnson five-time W. C. Handy award winner Rory Block re-wrote these words to befit her own cultural agenda, inverting the original sentiment as: “I got to love my baby ‘til I get satisfied”.[2] The Gibson L-1 guitar featured in Johnson’s Hooks Bros. portrait briefly became another contested artefact when it appeared in the catalogue of a New York State memorabilia dealership in 2006 with an asking price of $6,000,000. The Australian owner had apparently purchased the instrument forty years earlier under the impression it was bona fide, although photographic comparison technology showed that it couldn’t be genuine and the item was withdrawn. “Had it been real, I would have been able to sell it several times over,” Gary Zimet from MIT Memorabilia told me in an interview for Guitarist Magazine at the time, “a unique item like that will only ever increase in value” (Stewart 2010). References Ainslie, Scott, and Dave Whitehall. Robert Johnson: At the Crossroads – The Authoritative Guitar Transcriptions. Milwaukee: Hal Leonard Publishing, 1992. Bakhtin, Mikhail M. The Dialogic Imagination. Austin: University of Texas Press, 1982. Banks, Russell. “The Devil and Robert Johnson – Robert Johnson: The Complete Recordings.” The New Republic 204.17 (1991): 27-30. Banninghof, James. “Some Ramblings on Robert Johnson’s Mind: Critical Analysis and Aesthetic in Delta Blues.” American Music 15/2 (1997): 137-158. Benjamin, Walter. The Work of Art in the Age of Mechanical Reproduction. London: Penguin, 2008. Blackthorne, Angus. “Robert Johnson Slowed Down.” YouTube.com 2011. 1 Aug. 2013 ‹http://www.youtube.com/user/ANGUSBLACKTHORN?feature=watch›. Blesh, Rudi. Shining Trumpets: A History of Jazz. New York: Knopf, 1946. Blischke, Michael. “Slowing Down Robert Johnson.” The Straight Dope 2008. 1 Aug. 2013 ‹http://boards.straightdope.com/sdmb/showthread.php?t=461601›. Block, Rory. The Lady and Mrs Johnson. Rykodisc 10872, 2006. Charters, Samuel. The Country Blues. New York: De Capo Press, 1959. Collins UK. Collins English Dictionary. Glasgow: Harper Collins Publishers, 2010. DiGiacomo, Frank. “A Disputed Robert Johnson Photo Gets the C.S.I. Treatment.” Vanity Fair 2008. 1 Aug. 2013 ‹http://www.vanityfair.com/online/daily/2008/10/a-disputed-robert-johnson-photo-gets-the-csi-treatment›. 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