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Category:MIDI-Based SPC Sound Engines: Difference between revisions

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(Removed Accolade and added Game Studio, also sorted out Alfa System and Eurocom.)
(Re-adding Accolade, mostly as a result of tracing finding a VCMD that was also from MIDI (meaning it had a mixture of actual MIDI and unofficial MIDI).)
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These SPC engines almost match, but the highest bit of a VCMD has a different meaning:
These SPC engines almost match, but the highest bit of a VCMD has a different meaning:
* [[Accolade Engine]] ''(uses the highest bit to indicate whether there is a delay or not)''
* [[Alfa System Engine]] ''(allows VCMD ID duplication through not setting the highest bit and also contains an option via the track header to use compressed data instead, therefore the internal compression format must be recorded as well)''
* [[Alfa System Engine]] ''(allows VCMD ID duplication through not setting the highest bit and also contains an option via the track header to use compressed data instead, therefore the internal compression format must be recorded as well)''
* [[Bits Studios Engine]] ''(allows VCMD ID duplication through not setting the highest bit)''
* [[Bits Studios Engine]] ''(allows VCMD ID duplication through not setting the highest bit)''

Revision as of 17:56, 26 February 2023

This contains a list of SPC Sound Engines whose internal VCMD format contains a match to MIDI's own format (at least as far as being able to generally identify it). Except for Loriciel and Silicon Sorcery's SPC sound engines, the header generally does not match MIDI's own format. They may contain custom and/or relocated VCMDs in place of standard MIDI features in some cases.

The following SPC sound engine pages that satisfy this criteria have not been created yet:

These SPC engines almost match, but the highest bit of a VCMD has a different meaning:

  • Accolade Engine (uses the highest bit to indicate whether there is a delay or not)
  • Alfa System Engine (allows VCMD ID duplication through not setting the highest bit and also contains an option via the track header to use compressed data instead, therefore the internal compression format must be recorded as well)
  • Bits Studios Engine (allows VCMD ID duplication through not setting the highest bit)
  • Eurocom Engine (allows VCMD ID duplication through not setting the highest bit: the sound driver contains the ability to use backreferencing, somewhat akin to SNESGSS's, though I need to do some more analysis of this one, as this one has some more features... and nesting support)

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