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

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