Robert Siemer wrote: > I'm somewhat confused about the ioctl()s after reading > linux/Doc*/vid*/API.html. > > Via VIDIOCSAUDIO i can force my radio driver to mono sound. How did you do this? I want to force my radio driver to mono as well. I tried: va.mode = VIDEO_SOUND_MONO; ioctl (fd, VIDIOCSAUDIO, &va) with no results. I do a ioctl (fd, VIDIOCGAUDIO, &va) before and after the VIDIOCSAUDIO and get the following: Before After va.audio = 0 va.audio = 0 va.volume = 0 va.volume = 0 va.base = 49151 va.base = 49151 va.treble = 40915 va.treble = 40915 va.flags = 0 va.flags = 4 va.name = ^G va.name = ^G va.mode = 1 va.mode = 1 va.balance = 49151 va.balance = 49151 va.step = 9904 va.step = 9904 What am I missing? I know the card (WinTV 401) can do mono radio because the Windows radio application does it. Thanks, Will Heyman heyman@xxxxxxxx