Re: Recording audio

On Wed, Jun 18, 2014 at 09:51:29AM +1200, Geoff Barkman wrote:
> Well I work in Radio and we have to log everything we broadcast. I use
> a combined command line recorder (arecord) to record what we
> broadcast.
> 
> #!/bin/bash
> 
> export currenttime00=$(date +%H%M)
> arecord -d1800 -r44000 -f cd -t wav /mnt/sda1/share/wav/$currenttime00.wav

Interesting! Thanks for that. Just off the top of your head (I'll look
into it later.), does it take a '-t ogg' option? Just looked at the man
page and it doesn't say either way.

Ahh! This explains it and much much more! :)
http://jordilin.wordpress.com/2006/07/28/howto-recording-audio-from-the-command-line/

> and this will record everything going into the line input on a sound
> card for 1800 seconds (30 minutes) and spit it out to a pcm wave file.
> I haven't recorded more than an hour at a time... but I'm sure it
> would work as long as the final wave file doesn't exceed 4 gig. (I
> believe wave files can't be bigger than that).

It seems the limit is 2GB
http://www.hydrogenaud.io/forums/index.php?showtopic=32422

You might be thinking of the FAT32 filesystem which has a ~4GB file size
limit.

... hang on ...

This seems more technical/reliable and says a .wav file limit is 4GB
http://blogs.msdn.com/b/dawate/archive/2009/06/23/intro-to-audio-programming-part-2-demystifying-the-wav-format.aspx

-- 
"If you're not careful, the newspapers will have you hating the people
who are being oppressed, and loving the people who are doing the 
oppressing." --- Malcolm X

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