Creative SB0350 Programming Manual page 47

3-18 Digitized Sound I/O Programming
At the end of data transfer:
1.
2.
3.
During high-speed DMA mode data I/O, the DSP will not accept any commands.
Hence, to stop data transfer before the end of a block, send the reset DSP command.
Turn off the DAC speaker.
outp(wSBCBaseAddx+0xC, 0xD3)
Disable the interrupt used.
Restore the original interrupt service routine.