jwilzewske: John Bischoff: Audio Combine, Modal/Bispectral Discoveries, Post-Human Futures

L ocal color’ features synthetic bell-like tones, sustained tonal clusters, and computer-triggered acoustic bells struck in complementary patterns that are sometimes random, sometimes human-triggered, and combinations of both... It is enough to reference the idea of a tactus, but not enough to be [understood as] an organizing [meaning-generating/insuring] element.”
— Audio Combine, liner notes, Ed Osborn, Brown Univ, 2011.

T he music comprising John Bischoff’s new CD ‘Audio Combine’, just released on New World Records, is beautiful, fascinating, thoroughly enjoyable. Philip Perkins’s engineering and production values are superb.

T he five tracks on the disc are diverse, representing Bischoff compositions from 2004 to mid-2011. The third track ‘Local Color’ evokes traditional chinese zhong bells, but also especially calls into question the ‘who’ of music performance [in asmuch as some of the bells are computer-triggered, randomly and deterministically, while others are played by Bischoff from his score] and other limits of performance identity [insofar as the bell modes and timbres evolve after the bell is struck—on the rim; on the bosses/nipples; on the wall; etc.—in aleatoric/random ways that the musician-computer can neither predict nor control]. Of course, all music emerges in less-than-predictable/controllable ways—just less obviously so than bells.

[50-sec clip, John Bischoff, ‘Local Color’; (track 3), 2012, 1.4MB MP3]

T he pieces were all recorded in live performance with minimal editing and no over-dubs. Philip Perkins recorded direct from Bischoff’s setup and also from three pairs of microphones placed at various points in the concert hall. The mix heard here switches between these four perspectives as the pieces are played. The distance and pace incorporated into the recordings from various mic positions give a clear sense of the space of the performance, and of the object-ness of the sounds. That space and our place within it become the final part of the ‘material’: when the listener has no fixed point of perspective, then the position from which the listening/understanding is done becomes one of the elements of counterpoint.”
— Audio Combine, liner notes, Ed Osborn, Brown Univ, 2011.

T here are a few excellent books that empirically measure the modal vibrations of bells... He & Fu, for example. And some books on bispectral analysis—mainly used today in aerospace engineering and vibration-management engineering of turbines and other structures. Useful to explore if you are a composer/performer wanting to know more about how to more reliably utilize distinctive bell harmonics in your work. Links to some of these at the bottom of this post.

[Modal Analysis, Fu & He, 2001, p. 276]

[50-sec clip, Wang Yuanping & Hubei Chime Bells Orchestra, ‘竹枝词 (Zhu-zhi-ci) Bamboo-pole Love Poem’; (track 1), 1989, 1.5MB MP3]

T he substantial rhythmic independence of the parts in the ‘Local Color’ bell quartet is part of its distinctive Asian beauty. Because each bell projects its sound clearly, each individual bell can easily be heard over the rest of the bell ensemble, and yet the ensemble—the ‘community’ of bells—remains the primary subject. This is dissimilar from other voiced percussion like a timpani choir, performing a ‘programmatic’ role, where the effect of four or more timpani playing together is treated more as an ‘effect’ than as harmony. It is instead quartet ‘orchestration with Chinese characteristics’!

W ith computer-triggered sticking, the timing of the ring-down and the pitch-bend are the same, but the kinematic nuances of human left-hand/right-hand mallet or sticking patterns are gone. But the electromechanical linear actuators for the computer-controlled bells have their own kinematic constraints, in terms of speed of resetting for the next stroke, and so on. They have their own unique, finite kind of ‘embodiment’ just as we humans have ours, and we can hear this in these wonderful Bischoff compositions and this excellent recording of them being performed ‘live’.

A nd so the most amazing thing that we get from Bischoff’s mechatronic compositions like ‘Local Color’ is a vivid glimpse of robotic humanity and machine consciousness, revealed by the beater mechanics and linear actuators... something like an inversion of the ‘human-becoming-machine’ perspective of Ambrazevičius and Balsienė (link below): ‘machine-becoming-human’... a brilliant future of new expressive possibilities, including bionic accomodations for musicians with disabilities. Musical prosthetics? Sonnez les matines! / Din, dan, don!

J ohn Bischoff (b. 1949) is an early pioneer of live computer music. He is known for his solo constructions in real-time synthesis as well as his seminal work in computer network ensembles. Bischoff studied composition with Robert Moran, James Tenney, and Robert Ashley. He has been active in the experimental music scene in the San Francisco Bay Area for over 25 year as a composer, performer, teacher, and grassroots activist. His performances around the US include NEW MUSIC AMERICA festivals in 1981 (SF) and 1989 (NYC), Experimental Intermedia (NYC), Roulette Intermedium (NYC), and the Beyond Music Festival (LA). He has performed in Europe at the Festival d'Automne in Paris, Akademie der Künst in Berlin, Fylkingen in Stockholm, and TUBE in Munich. He was a founding member of the League of Automatic Music Composers (1978), considered to be the world's first Computer Network Band, and he co-authored an article on the League's music that appears in "Foundations of Computer Music" (MIT Press 1985). He was also a founding member of the network band The Hub with whom he performed and recorded from 1985 to 1996.

jwilzewske

Sunday, February 12, 2012

John Bischoff: Audio Combine, Modal/Bispectral Discoveries, Post-Human Futures

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