[pvrusb2] pvrusb2-mci-20070114 radio support - stereo?
rickm at timshel.ca
Fri Jan 19 11:37:06 CST 2007
Mike Isely wrote:
> OK, I tried a couple things.
> First, I have 3 PVR USB2 devices here of various ages. So I looked at
> the packaging. The newest two devices have the same box, while the
> oldest device was packaged in a box with different artwork on it (same
> size box however). On that old box, I found one spot where it says
> this: "125 channel cable ready TV tuner and FM stereo radio receiver".
> However on the other two boxes the best I could find just had "FM radio
> I listened briefly to FM radio (using mplayer) on a model 29032 device
> (one of the newer ones). You're right. It's mono.
> Wondering if perhaps the stereo FM capability had been lost during a
> "cost reduction" for the newer devices, I pulled my oldest device out of
> my mythtv setup and tried its FM radio. (This was the device that
> arrived in the packaging that said "FM stereo radio receiver".) Result?
> Same as before: mono audio for the FM radio.
> This could very well be a bug in the V4L chip-level driver for the
> demodulator. Or it could be that the FM radio simply doesn't work in
> stereo (which would be rather astounding). There are a few other leads
> to chase here. I'm going to try this same experiment under Windows.
> If someone would like to try that first, I'd welcome hearing about the
> result. Before I can try this under Windows, I've got to reinstall the
> WinTV package and drivers under Windows. I haven't had to run this
> under Windows for quite a while and have since replaced all the hardware
> and reinstalled the operating system. (For me the half-life of a stable
> Windows installation seems to be about 6 months. Stupid P.O.S.)
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).
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