Re: [LAU] [OT] Open Source Portable Recorder?

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To: <linux-audio-user@...>
Date: Wednesday, January 9, 2013 - 8:47 pm

Ok, if there were such a project already I guess one of you would
know. I also found nothing on the web so there probably is none. But
it's nice to see that I am not the only one who wants this :) You all
had some nice ideas and suggestions. The timemachine-style recording is
one thing I would definately want to have.

As to the hardware, I think the single-board computers would be a bit
overkill. It would make things a bit expensive, and it's really more
than is needed. I think one of the 32-bit ARM chips should have enough
processing power for an audio recorder.

A development board like the stellaris launchpad could be a good
starting point for a prototype. It has an 80 MHz ARM CPU with floating
point, a few KB of RAM, some flash storage for code, and the ADCs
should be perfectly ok for audio. It's only 13 US$, and I have a
couple of them here.
http://www.ti.com/ww/en/launchpad/stellaris_head.html?DCMP=stellaris-lau...

Obviously, for things like the timemachine recording, more RAM would
have to be added. I don't know how hard that would be. Interfacing with
SD cards for mass storage is relatively easy.

The DSO nano quad is an open source oscilloscope with 2 analog inputs
with more bandwidth than any audio recorder would need:
http://www.seeedstudio.com/depot/dso-quad-4-channel-digital-storage-osci...

It has a display, buttons and everything built in. Maybe this would be
a good base, too.

Mind you, I mainly wanted to know if such a thing already exists, and
now I'm just throwing ideas around. Not sure how much time and effort I
really want to put into this - I'm an OK programmer but I'm not too
good at the more advanced electronics stuff (though I know some people
who are).

It would be a very cool project though, and there seems to be some
demand for it :-)

On Sun, 6 Jan 2013 14:57:52 +0100
Johannes Kroll wrote:

> Hi all!

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Messages in current thread:
[LAU] [OT] Open Source Portable Recorder?, Johannes Kroll, (Sun Jan 6, 1:58 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, Johannes Kroll, (Wed Jan 9, 8:47 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, Karl Hammar, (Thu Jan 10, 12:29 am)
Re: [LAU] [OT] Open Source Portable Recorder?, Len Ovens, (Sun Jan 6, 4:48 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, Johannes Kroll, (Mon Jan 7, 5:42 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, Len Ovens, (Wed Jan 9, 4:46 am)
Re: [LAU] [OT] Open Source Portable Recorder?, Alf Haakon Lund, (Wed Jan 9, 5:39 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, Len Ovens, (Wed Jan 9, 9:24 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, david, (Thu Jan 10, 6:51 am)
Re: [LAU] [OT] Open Source Portable Recorder?, Burkhard Woelfel, (Tue Jan 8, 1:16 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, wes schreiner, (Tue Jan 8, 9:36 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, Burkhard Woelfel, (Wed Jan 9, 8:27 am)
Re: [LAU] [OT] Open Source Portable Recorder?, Folderol, (Tue Jan 8, 9:54 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, wes schreiner, (Tue Jan 8, 10:10 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, Folderol, (Tue Jan 8, 10:30 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, Len Ovens, (Mon Jan 7, 10:14 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, mark hadman, (Mon Jan 7, 11:33 pm)
Re: [LAU] [OT] Open Source Portable Recorder?, Alf Haakon Lund, (Tue Jan 8, 5:22 pm)