XGM driver and Sound Effect Priority/Channel

[Deleted]

I can't quite identify where to change and priority and what channel in Stefs XGM driver. How many priority levels are there? Is it 0 first or some larger number? What channels are valid? Which ones should I choose to avoid conflict with music?

Here is the code from Stefs XGM topic that I think is relevant:

boomsound:
                   asm    
                       lea     BOOMpcm,a1                  ; put address of sample in a1
                       move.l  #(BOOMpcm_end-BOOMpcm),d1   ; put length of sample in d1
                       move.l  #((1<<4)|1),d2              ; put priority and channel number in d2
                   end asm
                   xgm_playPCM
                   return  

[Deleted]

move.l #((1<<4)|ChannelNumber,d2

Hope that helps!

[Deleted]

Oct 25, 2015 22:31:58 GMT -5 @elusive said:

move.l #((1<<4)|ChannelNumber,d2

Hope that helps!

That surely does, thanks! I'm still wondering:

What channels are safe from interfering with music playback? From the Stefs XGM driver topic it *seems* like channels 1-4 are taken.

Where is the priority set and what are the valid values?

[Deleted]

You can use all 4 channels for sound effects. You just want to avoid using FM channel 6 as that's the channel that the PCM sample plays through.