Changing Sound Pitch?

[adeon]

Hello, guys!
Since I know ZDoom/GZDoom makes a cool sound reverb underwater, I was wondering: does it support changing the pitch of a sound?
If yes, is it possible to change the sound's pitch while it's already playing?
Thank you.

[Geometer]

There are few SNDINFO directives, that controls sound pitch:

$pitchshift soundname <range>
Specifies how much the pitch of the specified sound may be randomly altered when it is played. <range> may be in the range of 0 to 7.

$pitchshiftrange <range>
Sets a default pitch shift value that is applied to all subsequent sound definitions.