QS6400 is kind of a high quality sound DSP.
Part Number : QS6400
Function : 64 Poly ADPCM Sound Synthesizer For Mobile Phone.
Package : 40P MLP Type
Manufacturers : Altonics
This IC is a high quality sound DSP for mobile phones that plays music through a built-in ADPCM decoder with sound font rom.
This DSP is equipped the Altonics QPCM synthesizer, which is capable of generation up to 64 voices with different tones.
ADPCM synthesizer functions
1. 64 voices generated at 39kH simultaneously.
2. Compatible with stereophonic sound generation.
3. Master Volume control Individual channel volume / master volume.
4. Built-in MIDI handler(sequencer)
5. Equipped with two buffers of 128 bytes FIFO for MIDI play.
6. Built-in 4 bit or 8 bit ADPCM decorder.