to be able to easily check our entire analog audio in/out cicuits
(with a sweep generator feeding mic in and measuring the signal from
audio out) I'd like to know whether there's any low level loopback
available in ALSA core (or ALSA lib).
The closer to HW the better it is.
This is what our analo
to check out some audio circuitry I'm in need of a simple
audio analyzer tool that analyzes tones (given the sample rate).
Ideally, it should read WAV/RAW audio samples from stdin and
print the min, max, average amplitude and frequency (and SNR if possible).
since it's all embedded stuff I'd pre
as far as I know:
sample format S24_LE is 24bit sample in 4 bytes
sample format S24_3LE is 24bit sample in 3 bytes
(why else have separate definitions), right ?
In the ALSA-LIb example /test/pcm.c however
(http://www.alsa-project.org/alsa-doc/alsa-lib/_2test_2pcm_8c-example.html)
there is no diff
Sergei Steshenko wrote:
>
> -Original Message-
> From: stan <[EMAIL PROTECTED]>
> To: Sergei Steshenko <[EMAIL PROTECTED]>
> Date: Tue, 01 Jul 2008 07:25:44 -0700
> Subject: Re: [Alsa-user] which are the pieces of ALSA source code
> responsibleforsetting sample rate ?
>
>
>> Then you ar
>
> If you'd buffer a bit I guess. Is "arecord -f | aplay" not minimal
> enough? Although it's not what you meant, arecord is a link to aplay, so
> it's still one program :-)
>
thanks, it works great.
sometimes one fails to see the most simple solution.
N.
--
This message has been scann
I would like to test an ALSA driver by capturing audio
and immediately play the captured audio (loopback).
It's an embedded driver and the still to be developed audio app
will interface to the driver via ALSA-LIB.
therefore I would like to do this with the simplest and smallest
possible ALSA-LIB
