I'm thrown off by this line here from the reference: channel: 0 for any available channel, 1-8 for specific channel (wavs only)
I don't think I'd even be asking this question except I've been frustrating myself with attempts to use an OGG for background music, and then have it switch off when I logout of the starting mob.
To stop the sound by channel I'm attempting:
src<<sound(null,,1,0)
"set to 1 through 1024 to choose a specific sound channel"