Re: kern/55687: Slowed down/noisy recording with audio(4) (probably incorrect sample rate)

[Jared McNeill <jmcneill%invisible.ca@localhost>]

The following reply was made to PR kern/55687; it has been noted by GNATS.

From: Jared McNeill <jmcneill%invisible.ca@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, 
    leot%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.
 
 Cheers,
 Jared