[linux-audio-user] HDSP9652 and maybe driver problems

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On 9/29/05, Michele Spinolo <michele.spinolo@xxxxxx> wrote:
> Hi guys,
>
> I have a RME HDSP9652 plus RME ADI-8 Pro under a FC3 PlanetCCRMA@Home distro
> and I am experimenting some problems.
> Kernel used is 2.6.10-3 with real time patch, and the distro is up to date.
>
> I use rec_imp
> (http://www.duffroomcorrection.com/wiki/Simple_Automated_IR_Measuring_Tool)
> to measure my chain: I simple connect ADI-8 Pro input to output and analyse
> the impulse response.
> Well when first channel is used (i.e. input 0:0 output 0:0) results are
> pretty good while using other inputs outputs results are really bad.
> Basicly I have a lack in low frequency: looking at HDSPMixer I notice that
> the input channel displays the signal only after some time the signal is
> played on output. This should be the reason of lack of low frequency: the
> impulse response is obtained by a logaritmic sine sweep test signal.
>
> I contacted Ed Wildgooses (rec_imp creator), who supposed it could be a
> driver problem: I was wondering if it is a known bug or someone had the same
> problem.
>
> Thanks!
> Michele

Hi Michele,
   I know you've had this problem for awhile. Sorry about that.

   Right now one of my HDSP 8652 outputs is hooked to an ADAT AI-3.
Not as nice as your RME converter but reasonable.  I think I could
test it if you could give me some clear instructions on how to do this
quickly. I don't have enough time to figure it out by myself. IS it
really as easy as connecting an output to an input?

   One question for you. Is the problem identical no matter what ADAT
port you use on the HDSP 9652?

Cheers,
Mark


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