INT 18 - Gravis Ultra Sound YEA_GUS.EXE - RAMP VOLUME AX = 6909h BL = voice number (00h-1Fh) BH = looping type (0 = none, 1 = forward, 2 = back and forth) CX = starting volume DX = ending volume DI:SI = time Return: nothing SeeAlso: AX=6902h,AX=690Ah