[mythtv-users] using WinTV PVR-350 to play AM/FM radio? (slightly OT)

Jeff Simpson jeffsimpson at alum.wpi.edu
Wed Apr 5 16:47:10 UTC 2006


On 4/4/06, Brad DerManouelian <myth at dermanouelian.com> wrote:
>
> On Apr 4, 2006, at 7:17 PM, Steven Adeff wrote:
>
> > On 4/4/06, Brad DerManouelian <myth at dermanouelian.com> wrote:
> >> On Apr 4, 2006, at 6:51 PM, Steven Adeff wrote:
> >>
> >>> On 4/4/06, Brad DerManouelian <myth at dermanouelian.com> wrote:
> >>>> Sorry to repost what's already in the thread, but:
> >>>> I'm able to get FM playing through my MythTV box with
> >>>> # ivtv-radio -f 90.3
> >>>
> >>> sadly, all I get is noise from mine...
> >>>
> >>> --
> >>> Steve
> >>
> >> Do you have your antenna plugged in? You won't get anything
> >> without it.
> >
> > first thing I did...  but in fact it gives me the same noise with
> > or without it.
>
> Ok, well mine was working and doesn't any more. Not sure what I would
> have changed to give me the same noise you're getting.
>

What noise are we talking about? Is it a static no-signal kind of white
noise? or a high-pitch screetchy sort of noise?

The output of /dev/video24 is raw audio, so if you don't tell aplay what
format to read it in, it will sound like screetchy death-metal. Try using
this command:

aplay -f dat < /dev/video24

the "dat" specifies 48000 Hz, 16 bits, stereo, little-endian

alternatively, you can pipe it through sox for an ogg or mp3 conversion:

cat /dev/video24 | sox -t raw -r 48000 -w -s -c 2 - -t ogg out.ogg
cat /dev/video24 | sox -t raw -r 48000 -w -s -c 2 - -t mp3 out.mp3

I just learned all of this yesterday :-)
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