Re: [alsa-devel] snd_pcm_hw_rule_noresample

23 Sep 2011


      2011/9/20 Clemens Ladisch clemens@ladisch.de:
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Raymond Yau wrote:
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ALSA: pcm: add snd_pcm_hw_rule_noresample()
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ymfpci and emu10k1 have SNDRV_PCM_RATE_CONTINUOUS and support 8000Hz to 48000Hz
after this patch and if application using
snd_pcm_hw_params_set_rate_resample(,pcm , params ,0)
why the supported rate is only 48000Hz ?
Because these cards run at 48 kHz and resample anything else.  That
the resampler is implemented in hardware does not make a conceptual
difference, and just means that the resampler has low quality.
There is a demo case about the problem of emu10k1 at 44100Hz
your patch also disable the software converter
https://bugs.launchpad.net/ubuntu/+source/alsa-plugins/+bug/57089/comments/2