From: Clemens Ladisch <clemens@ladisch.de>
To: Harman Kalra <harman4linux@gmail.com>
Cc: alsa-devel@alsa-project.org
Subject: Re: Selecting Audio formats
Date: Thu, 19 Jul 2012 17:00:03 +0200 [thread overview]
Message-ID: <500820F3.4050302@ladisch.de> (raw)
In-Reply-To: <CAA4JwzUwL=nkwcpJa62i9nLW8MOZ3mcj696-53V3R-wbdkbnnA@mail.gmail.com>
Harman Kalra wrote:
> Since so many PCM formats such as S8, U8, S16_LE, U16_LE, A-law, u-law-,
> IMA_ADPCM, MPEG, GSM, etc are there so which format should I opt for.
In most cases, you should use some format supported by your hardware.
Typically, this is S16.
> 1. What is difference between signed and unsigned PCM format, how does
> it can affect the sound quality.
It does not affect the sound quality.
> 2. If I go for MPEG format, does it mean that audio compression would
> handled at my audio port level and my DSP processor would not come into
> picture.
If you tried to set MPEG format, ALSA would inform you that the device
does not support this.
> 4. If I opt for A-law or u-law, what could be benefits/disadvantages of
> using these formats.
These formats use one byte per sample, like U8, but have more dynamic
range than U8. They are still worse than S16.
Regards,
Clemens
next prev parent reply other threads:[~2012-07-19 15:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-19 14:21 Selecting Audio formats Harman Kalra
2012-07-19 15:00 ` Clemens Ladisch [this message]
[not found] ` <CAA4JwzW3zNOCWeFoaCSxnx8WzsQTbu1+rOuq2jFxdt043MWSaQ@mail.gmail.com>
2012-07-19 18:35 ` Clemens Ladisch
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=500820F3.4050302@ladisch.de \
--to=clemens@ladisch.de \
--cc=alsa-devel@alsa-project.org \
--cc=harman4linux@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.