I think I posted this to the wrong thread before so will need to remove it from the Engineering one. I'm not sure what it's called, but I need an mp3 or audio player that will allow me to select which track I want to play with the push of a few simultaneous buttons. The tracks will be little 2-5 second snippets of a certain voice saying a phrase. So if I pushed button 1 & 2 together, it would play track 1 for instance, and then stop. I think the input could be called a chordic keyboard, which I could make using small pushbuttons in a handheld unit. I just need an mp3 player that responds to the various inputs. I might have up to 100 tracks, the longest of which might be 30 seconds or a minute. I looked online, and one site wanted around $500 for a programmable unit. I don't need it programmable, just multi-selectable. I can solder or wire if needed.