You really have a couple solutions. First, you can modify your mp3 player to output its stream to multiple devices, and if that doesn't work, you could really write a simple wrapple program that would take the audio output from your mp3 player, and simultaneously write to several devices (I like that idea, because then you could do some fun stuff with it, like turn on and off a room's speakers, have two different things playing with two mp3 players, etc).
Just make sure your irq's and io ports are not conflicting with each other (dma also), or anything else in the system for that matter.
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Did you not notice he said procmail wasn't fixing his problem. =]
You really have a couple solutions. First, you can modify your mp3 player to output its stream to multiple devices, and if that doesn't work, you could really write a simple wrapple program that would take the audio output from your mp3 player, and simultaneously write to several devices (I like that idea, because then you could do some fun stuff with it, like turn on and off a room's speakers, have two different things playing with two mp3 players, etc).
Just make sure your irq's and io ports are not conflicting with each other (dma also), or anything else in the system for that matter.
It's pretty flexible.