PocketSPC is a SNES sound chip emulator for the Nintendo DS. The SPC700 is capable of 8 channel stereo playback at 32,000Hz with ADSR envelope support per voice, and an 8 tap FIR filter. Currently all 8 channels are emulated in stereo, with full ADSR support. Changes:

Added echo/filter support! Makes a lot of soungs sound much better. Check the readme for other fixes.

http://pocketspc.pocketheaven.com/