Bug#413671: More information required

[David Baron]

On Thursday 26 March 2009 16:41:15 Adrian Knoth wrote:
> On Wed, Mar 25, 2009 at 07:23:10PM +0200, David Baron wrote:
> > > For me, this looks like a broken soundcard (ADC and DAC should not
> > > differ) and/or a detuned audio clock in case of external
> > > synchronization (I don't know your setup).
> >
> > I am using an older en1371 (since I hae no support for my pro-card, also
> > an
>
> I've googled a bit on the net, the en1371 is known to be broken, at
> least with the ALSA driver. Other en1371 users have this 44099Hz
> problem, too.
>
> Here is what Paul Davis (jackd author) says:
>
> 15:14 < las> adi: its the ALSA driver and the h/w *design*
> 15:15 < las> adi: you could view it two ways. (1) the device doesn't run at
> the correct rate, and unlike other devices, actually tells you this (2)
> like most comparable devices, it doesn't run at the correct rate, and
> unlike them it tells you about it
>
> > I cannot say if a replacement card would fare and better here.
>
> It probably would, almost every other card you can get. ;)
>
> But there might be another way to give you a working setup: run jackd
> with the dummy driver and use alsa_in and alsa_out to bridge to the
> actual device.
>
> This way, your jackd will report 44100 to your application, alsa_out
> then resamples to 44009.
>
>
> Unfortunately, the current jackd package (0.116.1-4) doesn't come with
> alsa_in and alsa_out, it'll be included in the next release.
>
> If you need it right now, you can still grab the jackd source from
> jackaudio.org, run configure (--prefix=/usr) and make, don't install
> anything but copy the alsa_in and alsa_out binaries to /usr/local/bin
> or somewhere else (to your home).
>
> You then use jackd's dummy driver, either from qjackctl or directly,
> i.e. jackd -d dummy -r 44100, start alsa_in, alsa_out and tapestrea,
> rewire according to your needs and that's it.


An interesting approach. I'll try it when jackd on Sid is supporting it.
I would not mind a 2nd hand delta44 card I can get here in Israel. Not been 
successful on ebay to find a decent price.