Re: EMU 0404 PCI-E wrong sampling rate (more info)

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На Wed, 26 Oct 2011 16:35:18 +0700
IL'dar AKHmetgaleev <akhilman@xxxxxxxxx> записано:

> Greetings
> I both new EMU 0404 PCI-E card and now have a problem.
> At 48000 all works fine
> At 44100 jackd plays and captures with lags.
> I did some research with player and arecord.
> Rig is simple:
> analog input directly connected to analog output.
> rate seted to 44100
> player plays music with 44100 and I can hear it in headphones without
> distorion.
> $  arecord -v -c 2 -r 44100 -f S16_LE -D hw:2 t.wav
> records sound but after that it plays faster then original.
> $  arecord -v -c 2 -r 48000 -f S16_LE -D hw:2 t.wav
> same result. But when I play this sample at 44100 it plays right.
> Seems like capturing sample rate is wrong at 44100.
> system info:
> linux 3.0.6-gentoo
> 04:04.0 Multimedia audio controller: Creative Labs SB0400 Audigy2
> Value

I did some more research.
baudline shows right sampling rate when I set 48000 Hz in alsamixer.
But when I set 44100 it shows 43800 for 48000 in baudline. And 40000
for 44100.

Seems alsa/card does unnecessary sampling rate conversion somewhere.

1 [EMU0404        ]: Audigy2 - E-mu 0404 PCIe [MAEM8984]
                     E-mu 0404 PCIe [MAEM8984] (rev.0,
                     serial:0x40051102) at 0xec00, irq 18

kernel module snd_emu10k1


Ильдар Ахметгалеев aka AkhIL
Чт. окт. 27 11:14:49 NOVT 2011
Thu Oct 27 04:14:49 UTC 2011
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