18 voices / polyphony

MIDIbox FM
1

OPL3 can provide those polyphonic modes:

* 18 FM channels (36 operators), or

* 15 FM channels (30 ops) and 5 percussion instruments (6 ops), giving us 20 channels altogether, or

* up to 6 four-operator FM channels (max 24 ops), the rest again being divided into two-operator FM channels and drums. (I think this is the unique mode on Midibox FM)

and this: (* means fm and + means additive)

a) FM-FM Mode: (Op1 * Op2 * Op3 * Op4)

b) AM-FM Mode: Op1 + (Op2 * Op3 * Op4)

c) FM-AM Mode: (Op1 * Op2) + (Op3 * Op4)

d) AM-AM Mode: Op1 + (Op2 * Op3) + Op4

so is there a way to set the polyphonic mode?

I would like play up to 18 voices with simple 2op configs.

thanks

opl3 info from experience with sound blaster pro and:

http://www.ugcs.caltech.edu/~john/computer/opledit/tech/opl3.txt

2

Basically, MIOS needs to be rewritten from scratch and the whole user interface will need to be reassigned/redesigned.

The source is included with MIOS. Let me know how it turns out! I just went on to working with a SB16 Adlib Tracker 2 and 

ancient MPU-401, though the Midibox version is still fun to toy with and more portable too.