I have ISA sound card based on ViBRA 16C chip. It is newest version of SB 16 manufactured by Creative, and compatible with original SB 16.
When music was playing and HDD working i hear clicks or pops in one channel.
Maybe it's a data collision on memory access or something like that.
It isn't problem with sound card or power supply because these card working great on win98. The same type of noise exist when playing mp3 stereo, mono (downmix channels), mod or mp3 from CD.
I'm using v1.53t (DOS4G) with ftp server, but all 1.50-1.58 DOS4G versions have the same same problem with my card.