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Re: kern/55687: Slowed down/noisy recording with audio(4) (probably incorrect sample rate)
The following reply was made to PR kern/55687; it has been noted by GNATS.
From: Jared McNeill <jmcneill%invisible.ca@localhost>
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost,
Subject: Re: kern/55687: Slowed down/noisy recording with audio(4) (probably
incorrect sample rate)
Date: Thu, 1 Oct 2020 12:19:02 -0300 (ADT)
On Thu, 1 Oct 2020, Tetsuya Isaki wrote:
> But since there are two recording sources on mixerctl, hdafg
> actually transferred four channels 48kHz of data during recording.
> Although I don't know that what benefit or functionality does
> multiple record source selection have, at least hdafg should be
> fixed not to transfer unreported (and not agreed each other)
> format data.
> I'm not sure but... should hdafg (or mixerctl?) be able to select
> only one record source at the same time?
For > 2 channel operation, an HD audio association includes more than one
DAC or ADC (each DAC or ADC widget can handle 1 or 2 channels). So being
able to select more than one record source is required.
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