How did you figured this our?

>We got some improvement by disabling Soundblaster in autoexec.nt and running in Windows 2000 compatibility. Can't tell yet how much of relief this brings, but it is not 100%.
>
>

>REM To disable the sound blaster 2.0 support on NTVDM, specify an invalid
>REM SB base I/O port address.  For example:
>REM    SET BLASTER=A0
>SET BLASTER=A0
>

>