[mythtv-users] Myth, Jack & resampling

Dave Badia dbadia at gmail.com
Sun Jul 6 02:37:10 UTC 2008


On Sat, Jul 5, 2008 at 11:39 AM, Joe Henley <joehenley at kc.rr.com> wrote:

> Dave,
>
> "Ah, so assuming my sound card only supports 48KHz, that would explain
> why the myth code is resampling the output. Is there some definitive way
> I can see if my sound card (mb audio VT8233) supports output at the
> 44.1KHz sample rate? Seems like that's the what this is coming down to... "
>
> You could try to ask the folks at Via.  Yeah, like they'd ever answer.
> Seriously, Via is well known for sound chips which support 48KHz only.
> Despite what modinfo and their web-site documentation show, 48KHz is
> pretty much it for them.  Try googling "Via" and "bit perfect audio" to
> see what I mean.
>
> I spent weeks trying get a Via mobo (and sound chip) to feed 44.1 KHz
> out the spdif.  Finally threw in the towel and bought a Turtle Beach
> Riviera for about $20 to $30.  It "just works."
>
> If you want your CD's to sound right, ie., not up-pitched about 10%,
> then you will have to get a new sound card.  To my knowledge, there is
> no alsa, jack, mythtv, or other way around it.
>
> Good luck,
>
> Joe Henley
>
> PS:  Just a side note, I think it's MythTV telling alsa to re-sample,
> not MythTv re-sampling.
>
> All very helpful.  I think it's time for me to give up bit-perfect audio
with the via chipset.  I've been considering new hardware anyway, I'll see
if any of the on-board audio chipsets support bit-perfect output, if not
I'll go with the Turtle Beach Riviera.  Most of the posts I read mentioned
the m-audio cards which were a bit too pricey for me.

Thanks
Dave
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