Ubuntu
linux package

  1. Bug #903853
  2. Comment #17

Comment 17 for bug 903853

Revision history for this message
David Henningsson (diwic) wrote : Re: [RFC PATCH] Inverted internal mic

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.