From: Raymond Yau <superquad.vortex2@gmail.com>
To: Clemens Ladisch <clemens@ladisch.de>,
ALSA Development Mailing List <alsa-devel@alsa-project.org>
Subject: Re: snd_pcm_hw_rule_noresample
Date: Fri, 23 Sep 2011 14:33:17 +0800 [thread overview]
Message-ID: <CAN8cciYMX50rRy_KhL4GtXF-Kv5uKQZ_9K+VRfW0m+dveKXnJw@mail.gmail.com> (raw)
In-Reply-To: <4E785362.2090808@ladisch.de>
2011/9/20 Clemens Ladisch <clemens@ladisch.de>:
> Raymond Yau wrote:
>> ALSA: pcm: add snd_pcm_hw_rule_noresample()
>>
...
>>
>> 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
prev parent reply other threads:[~2011-09-23 6:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-20 8:24 snd_pcm_hw_rule_noresample Raymond Yau
2011-09-20 8:48 ` snd_pcm_hw_rule_noresample Clemens Ladisch
2011-09-21 7:09 ` snd_pcm_hw_rule_noresample Clemens Ladisch
2011-09-23 1:19 ` snd_pcm_hw_rule_noresample Raymond Yau
2011-09-23 6:33 ` Raymond Yau [this message]
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