Re: [LAU] open hw soundcard (was Re: status usb2 for sound)

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To: <linux-audio-user@...>
Date: Tuesday, November 10, 2009 - 11:35 am

Ken Restivo:

...
...

Yes, or maybe raw ADC ints.

> I don't know if any of the cheap microcontrollers out there-- or

My near future project will use AT91SAM9260 (arm9, 32bit, 200MHz),
and linux.

> But the thought of a hardware audio interface that talks NetJACK

I don't know netjack nor osc, but maybe someone else does, would they
be good, lightweigth, and easy to implement for this?

> Hmm. It'd be more than just a native Linux-supported audio

Why not, maybe not cheeper, but open and hacker friendly.

> The devil's in the details, though. Which DAC/ADC chip?

Well start from the top:

1, test netjack and osc if they are things to use
(someone else has to come with the expertise for that)

2, the same with dummy audio values from the microcontroller to see
if its performance holds, I have an evaluation board that one
could do that on

3, the same add any ADC and an ext. preamp to get real sound

4, refine the ADC part to satisfaction

5, add preamp part

6, add power-over-ethernet so its just ONE cable

7a, start to miniturize, possible makeing it small enought to sit
directly on the mic,

or...

7b, add channels

I could do steps 2, 3, possible 4, 6 and possible 7.

Nice, don't you think so?
And, since ethernet is driven through transformers we won't have any
ground loops, etc. On the negative side is that ethernet cables are
more stiff than microphone cables, they have the wrong color ... it
woun't look that good, and they are not that durable, same with its
connector, but there are industrial version ethernet connectors one
could possible use with more suitable cables.

Regards,
/Karl

-----------------------------------------------------------------------
Karl Hammar Asp

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Messages in current thread:
[LAU] status usb2 for sound, Hartmut Noack, (Thu Nov 5, 9:06 am)
Re: [LAU] status usb2 for sound, Paul Davis, (Thu Nov 5, 2:45 pm)
Re: [LAU] status usb2 for sound, Lorenzo, (Thu Nov 5, 3:07 pm)
Re: [LAU] status usb2 for sound, Jörn Nettingsmeier, (Thu Nov 5, 3:40 pm)
Re: [LAU] status usb2 for sound, Hartmut Noack, (Thu Nov 5, 10:40 pm)
Re: [LAU] status usb2 for sound, Jörn Nettingsmeier, (Fri Nov 6, 9:19 am)
Re: [LAU] status usb2 for sound, Florian Faber, (Fri Nov 6, 9:28 am)
Re: [LAU] status usb2 for sound, Arnold Krille, (Sat Nov 7, 10:05 am)
Re: [LAU] status usb2 for sound, Ken Restivo, (Sun Nov 8, 7:49 am)
Re: [LAU] status usb2 for sound, Karl Hammar, (Sun Nov 8, 12:02 pm)
Re: [LAU] status usb2 for sound, Folderol, (Sun Nov 8, 2:46 pm)
Re: [LAU] open hw soundcard, Karl Hammar, (Fri Nov 13, 5:10 pm)
Re: [LAU] open hw soundcard, Karl Hammar, (Fri Nov 13, 4:43 pm)
Re: [LAU] open hw soundcard (was Re: status usb2 for sound), Karl Hammar, (Tue Nov 10, 11:35 am)
Re: [LAU] status usb2 for sound, Patrick Shirkey, (Sun Nov 8, 8:13 am)
Re: [LAU] status usb2 for sound, Florian Faber, (Sat Nov 7, 9:15 pm)
Re: [LAU] status usb2 for sound, Hartmut Noack, (Sat Nov 7, 11:06 am)
Re: [LAU] status usb2 for sound, Paul Davis, (Sat Nov 7, 6:47 pm)
Re: [LAU] status usb2 for sound, Hartmut Noack, (Sat Nov 7, 11:40 pm)
Re: [LAU] status usb2 for sound, Arnold Krille, (Sat Nov 7, 2:14 pm)
Re: [LAU] status usb2 for sound, Clemens Ladisch, (Fri Nov 6, 7:53 am)
Re: [LAU] status usb2 for sound, Ivica Ico Bukvic, (Sat Nov 7, 3:08 am)
Re: [LAU] status usb2 for sound, Clemens Ladisch, (Tue Nov 10, 1:57 pm)
Re: [LAU] status usb2 for sound, Arnold Krille, (Thu Nov 5, 11:38 pm)
Re: [LAU] status usb2 for sound, Martin Homuth-Rosemann, (Fri Nov 6, 6:55 pm)
Re: [LAU] status usb2 for sound, Dominic , (Sat Nov 7, 5:48 pm)
Re: [LAU] status usb2 for sound, Martin Homuth-Rosemann, (Sun Nov 8, 3:54 pm)
Re: [LAU] status usb2 for sound, Dominic , (Mon Nov 9, 12:20 am)
Re: [LAU] status usb2 for sound, david, (Sat Nov 7, 9:11 pm)
Re: [LAU] status usb2 for sound, Giso Grimm, (Thu Nov 5, 3:01 pm)