Int 80  - Sbsim - "getvolume" - Get Source's Volume                        [s]

   BX = 0400h
   AX = sound source (see #3645)

Return: CF clear if successful
       AX = volume
   CF set on error
       AX = error code (see #3643 at INT 80/BL=00h)

See Also: BX=0401h"SBSIM"

(Table 3645)
Values for SBSIM sound source:
 00h   master volume
 01h   voice
 02h   FM
 03h   CD
 04h   line in
 05h   microphone