Method and apparatus for playing a digital music file based...

Details Method and apparatus for playing a digital music file based... Method and apparatus for playing a digital music file based...

2006-05-16

2006-05-16

Martin, David (Department: 2837)

Music

Instruments

Electrical musical tone generation

C084S615000, C084S618000

Reexamination Certificate

active

07045700

ABSTRACT:
A method and corresponding equipment by which a synthesizer/MIDI (musical instrument digital interface) device (10) is able to optimally perform a MIDI file (11) taking into account not the polyphony required by the MIDI file (11) as in SP-MIDI (scalable polyphony MIDI), but taking into account instead extended scalable polyphony (XSP) data12bincluding the maximum number of instantaneous voices required by the MIDI file and the categories in which they occur for different channel masking, and also taking into account the architecture of the synthesizer/MIDI device (10) in terms of a voice complexity coefficient table (12b) indicating the relative complexity (corresponding to a resource requirement) for voices in each category. The result is a total voice requirement table12c-1indicating typically less masking than would be required for the same synthesizer/MIDI device to play the MIDI file according to SP-MIDI.

REFERENCES:
patent: 5138926 (1992-08-01), Stier et al.
patent: 5380949 (1995-01-01), Matsuda
patent: 6806412 (2004-10-01), Fay
patent: 2004/0159219 (2004-08-01), Holm et al.
Scalable Polyphony MIDI Specification, Version 1.0, Dec. 2001, RP-034. The MIDI Manufacturers Association, Los Angeles, CA, USA, 2002.
Mobile DLS Downloadable Sounds Level, Version 1.00.22432, May 2003, including MOD LFO to gain changes, published by The MIDI Manufactures Association, Los Angeles, CA, USA, 2003.

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