[LAD] FOSS Ethernet Soundcard

[Jörn Nettingsmeier]

On 12/01/2009 07:31 PM, Karl Hammar wrote:

>> The aim is to provide upto 8 audio i/o ports.
>
> I don't think we should set an upper limit, instead it would be
> interesting to see how many channels the system could support.
>
> I would say we try to make (input and output)
>
>   one desent channel, e.g. 16bits, 44.1/48kHz

if you are targetting the studio market (or anything other than basic 
consumer stuff, for that matter), this channel is inadequate. i think 
24bits at 48k is a sensible minimum. haven't looked at your intended 
cpu, but if it can do floats in hardware, 32bit float would be an even 
better choice.

>   one very good channel (if we manage), 24bits 192kHz, to try the limits

again, consider floats. the very nice advantage is that they can't 
overload, i.e. you only have to watch the very last meter in your signal 
chain, not every single stage.

>> The device will run Linux OS.
>> Audio data transfer will be via netjack using CELT compression.
>
> Ack.

does that mean it *can* use CELT (which is cool), or that it always uses 
CELT (which would be a severe limitation imho)?

>   It seems that my "archetectural" choises are
>   . a single board computer
>   . a stackable system like pc104, pico-itxe or arduino

i've heard arduino is quite popular, so if you that route, it might open 
up a wider user/contributor base.


best,

jörn