From: Takashi Iwai <tiwai@suse.de>
To: Paul Davis <paul@linuxaudiosystems.com>
Cc: alsa-devel@lists.sourceforge.net
Subject: Re: alsa-lib resamping error
Date: Mon, 27 Jan 2003 12:38:58 +0100 [thread overview]
Message-ID: <s5hel6yom99.wl@alsa2.suse.de> (raw)
In-Reply-To: <s5h3cnjzvm5.wl@alsa2.suse.de>
At Thu, 23 Jan 2003 17:20:02 +0100,
I wrote:
>
> At Wed, 22 Jan 2003 12:38:31 -0500,
> Paul Davis wrote:
> >
> > if you try to play a 22.05kHz stream on hardware that supports 32kHz
> > and 44.1kHz but not 22.05kHz, alsa-lib's plughw layer chooses to use
> > 32kHz and resamples. this seems like an error to me: it would be much
> > better to choose 44.1kHz and do simple integer resampling. that is:
> > the search for the best rate should first try integer multiples and
> > divisors of the desired rate, not the "closest" rate.
>
> agreed, it would be better.
>
> but... errm... changing this in alsa-lib is like going into a big
> labyrinth for me :)
and after a long wandering in the labyrinth, the changes are on cvs
now (both for alsa-driver and alsa-lib).
the new code will try the integer multiples at first.
i hope this works correctly...
Takashi
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prev parent reply other threads:[~2003-01-27 11:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-22 17:38 alsa-lib resamping error Paul Davis
2003-01-23 16:20 ` Takashi Iwai
2003-01-27 11:38 ` Takashi Iwai [this message]
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