From: David Henningsson <david.henningsson@canonical.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: ALSA Development Mailing List <alsa-devel@alsa-project.org>,
kailang@realtek.com, 903853@bugs.launchpad.net
Subject: Re: [RFC PATCH] Inverted internal mic
Date: Tue, 28 Feb 2012 19:11:15 +0100 [thread overview]
Message-ID: <4F4D18C3.1020700@canonical.com> (raw)
In-Reply-To: <s5hy5rnnfvz.wl%tiwai@suse.de>
On 02/28/2012 04:20 PM, Takashi Iwai wrote:
>> I'm talking about recording an internal mic in *stereo*, as I just wrote
>> below. Or don't you agree that is a valid and probably fairly common use
>> case?
>
> Well, when you record it in stereo, and play it back, then you hear
> the sound without problem.
That could definitely be questioned: depending on the distance between
speakers when you're finally playing it back, you might lose bass
frequencies [1]. (That said, I'm not sure how much bass these mics pick
up anyway.)
> The problem happens only when you sum the
> left and right signals into mono. Thus, as long as the stream is
> handled as stereo, it could be passed as is, although it's not
> optimal.
So the official recommendation is that summing left and right to make a
mono signal, is to be considered an invalid operation?
--
David Henningsson, Canonical Ltd.
http://launchpad.net/~diwic
[1] Or possibly get distorted sound in different ways, not sure.
next prev parent reply other threads:[~2012-02-28 18:11 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-28 8:57 [RFC PATCH] Inverted internal mic David Henningsson
2012-02-28 9:24 ` Takashi Iwai
2012-02-28 9:54 ` David Henningsson
2012-02-28 10:38 ` Takashi Iwai
2012-02-28 13:07 ` David Henningsson
2012-02-28 13:22 ` Takashi Iwai
2012-02-28 14:19 ` David Henningsson
2012-02-28 15:20 ` Takashi Iwai
2012-02-28 18:11 ` David Henningsson [this message]
2012-02-28 19:42 ` Takashi Iwai
2012-02-29 9:21 ` David Henningsson
2012-02-29 9:56 ` Takashi Iwai
2012-02-29 10:45 ` David Henningsson
2012-02-29 16:36 ` Takashi Iwai
2012-06-19 3:07 ` Eliot Blennerhassett
2012-06-19 7:43 ` David Henningsson
2012-06-20 13:31 ` Takashi Iwai
2012-06-21 1:15 ` David Henningsson
2012-06-21 12:52 ` Takashi Iwai
2012-06-21 13:04 ` David Henningsson
2012-06-21 13:19 ` Takashi Iwai
2012-06-21 14:23 ` David Henningsson
2012-06-22 9:33 ` Takashi Iwai
2012-06-22 10:46 ` David Henningsson
2012-06-22 11:00 ` Takashi Iwai
2012-06-22 12:46 ` Takashi Iwai
2012-06-22 15:27 ` David Henningsson
2012-06-22 15:37 ` Takashi Iwai
2012-06-22 17:33 ` David Henningsson
2012-06-23 2:58 ` Eliot Blennerhassett
2012-06-23 8:40 ` Takashi Iwai
2012-06-23 8:39 ` Takashi Iwai
2012-06-25 8:04 ` David Henningsson
2012-06-25 8:18 ` Takashi Iwai
2012-06-20 8:02 ` Takashi Iwai
2012-06-20 10:54 ` Eliot Blennerhassett
2012-02-29 11:02 ` Raymond Yau
2012-06-20 21:53 ` James Courtier-Dutton
2012-06-21 5:56 ` Takashi Iwai
-- strict thread matches above, loose matches on Subject: below --
2014-10-20 13:52 rodney byne
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