[pvrusb2] pvrusb2-mci-20070114 radio support - stereo?
hverkuil at xs4all.nl
Sat Jan 20 04:34:47 CST 2007
On Saturday 20 January 2007 05:17, Mike Isely wrote:
> Got it! I've got stereo FM radio working now. The root cause was a
> VIDIOC_S_TUNER command (which carried instructions to switch to
> stereo mode) which wasn't making it to the tuner core.
> A new snapshot will be forthcoming.
Is this a change that is also relevant for ivtv?
I also noticed in tuner-core.c that audmode is used for both radio and
TV tuner. I think that this should be split into a radio_audmode and a
> On Fri, 19 Jan 2007, Rick Macdonald wrote:
> > Rick Macdonald wrote:
> > > OK, I installed the USB2 onto a WinXP laptop. The WinTV Radio
> > > program is stereo. A red STEREO 'led' lights up, and there's a
> > > MONO toggle button that does what it says. My original package
> > > just says "FM radio receiver". It doesn't mention stereo (but
> > > their web site does).
> > >
> > > I thought I've seen on the web where other devices such as my
> > > PVR-150 explicitly state FM mono, but in most places it doesn't
> > > say either way. Rather than search again I think I'll boot up
> > > WinXP and see what happens. Not that the PVR-150 is of much
> > > interest to this list, but if it is also stereo under WinXP then
> > > the problem could be in low-level code shared by pvrusb2 and ivtv
> > > (or wherever it is).
> > This is a resend - the first attempt never showed up.
> > Well, I booted this PC into WinXP MCE and tried the internal
> > WinTV-PVR-150 (26552 LF NTSC/NTSC-J with Conexant CX23416-22) and
> > lo and behold, the FM radio is also stereo!
> > So, my WinTV-PVR-150 plays FM mono through ivtv-radio (which just
> > sets the frequency and then runs aplay -f dat < /dev/video24), and
> > the PVR-USB2 plays FM mono with pvrusb2, but both devices are
> > indeed stereo.
> > But wait! After I booted back into Linux, my internal PVR-150 now
> > plays stereo FM!
> > Unfortunately, the USB2 is still giving me mono.
> > I hope this helps.
> > ...RickM...
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