OPL3SA2_DMA_CONFIG
snd_opl3sa2_write(chip, OPL3SA2_DMA_CONFIG, 0x03); /* DMA Configuration - DMA A = WSS-R + WSS-P */
snd_opl3sa2_write(chip, OPL3SA2_DMA_CONFIG, 0x21); /* DMA Configuration - DMA B = WSS-R, DMA A = WSS-P */