Hi<br>i need to design a sistem to control 40 diferents audio files and 
playback in a stereo sistem. I was thinking to use puredata and arduino,
 load the 40 audios in a pd patch and use 40 switches and 
resistors into some arduino inputs to trigger and playback any of the 40 
audios in pd. Every switch will be conected to a diferent resistor to  generate diferents voltages then arduino inputs can diferenciate 
witch audio to playback. Also i need to power on a led any time a specific audio is been playback. The 40 audios will not be playback simultanusly, but probably al least 15 or 20 could be.<br><br>Anybody knows about a similar proyect? can i use analog input to control various samples or its not good idea? multiplexors? do i need to use an arduino mega or its not necesary?can i power 15-20 led simultaneously? the best way to do this system stable for long long time?<br>
<br>Thanks<br><br>