b64Xtended
version 1
Released: 2015.may
Authors: heavily based on code from Steven Yi, added new code and changed some code by Menno Knevel

This instrument is inspired by the SID sound chip commonly used in Commodore 64 computers, using simliar waveforms and options for ring modulation and pitch modulation (arpeggio).

[History]

v.1 - 2015. may (Menno Knevel)
- Added LFO code to produce octaves in the sound like the SID chip
- Changed filter to Low and High pass with Q, Bandpass remains butterbp opcode
- Back to 1 pitch value, so removed glissando feature (=more simple this way)
- Improved and added Volume button for total amplitude
- removed ADSD UDO

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;b64Xtened is heavily based on the b64 instrument from Steven Yi
below are his versions on which b64Xtended is built
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v2.5 - 2013.01.27 (Steven Yi)
-Fixed amp generation in yi_instr_gen UDO for 5 pfield note case where note is not tied

v2.4 - 2012.11.06 (Steven Yi)
-Made oscillator type and filter type automatable to allow adjusting in realtime

v2.3 - 2012.10.11 (Steven Yi)
-Modified to use my standard instrument template (yi_instr_gen)

v2.2 - 2012.10.08 (Steven Yi)
-fixed to work with tied notes and skip init in opcodes
-updated code to work with changing amplitude in tied notes

v2.1 - 2012.10.05 (Steven Yi)
-Fixed panning when used as SYi orch instrument
-added missing dependent UDOs

v2.0 - 2011.12.20 (Steven Yi)
-Modified to work with MIDI

v1.1 - 2008.02.04 (Steven Yi)
-Fixed Triangle wave not being generated
-Added use of pan_gm2 for panning

v1.0 - 2007.12.14 (Steven Yi)
-initial release