Answer Y if you want your audio card to emulate Sound Blaster Pro.
You should then say Y to "100% Sound Blaster compatibles
(SB16/32/64, ESS, Jazz16) support" and N to "Audio Excel DSP 16 (MSS
emulation)".
If you compile the driver into the kernel, you have to add
"aedsp16=<io>,<irq>,<dma>,<mssio>,<mpuio>,<mouirq>" to the kernel
command line.
You should then say Y to "100% Sound Blaster compatibles
(SB16/32/64, ESS, Jazz16) support" and N to "Audio Excel DSP 16 (MSS
emulation)".
If you compile the driver into the kernel, you have to add
"aedsp16=<io>,<irq>,<dma>,<mssio>,<mpuio>,<mouirq>" to the kernel
command line.