[linux-audio-user] ALSA/OSS Free supported sound card with 16input channels

Patrick Shirkey pshirkey at boosthardware.com
Mon Dec 1 10:50:51 EST 2003

jpo234 at netscape.net wrote:
> Patrick,
> thanks for your quick reply. I'm not quite sure whether your answer
> is really the answer on what I wanted to ask, so I'll clarify below.
> Patrick Shirkey <pshirkey at boosthardware.com> wrote:
>>Your be either one rme hammerfall + digital mixing desk with adat 
>>connectors. Otherwise you can use multiple cards but they need to be 
>>wordclock synced so you tracks stay in sample sync with each other. In 
>>that case you could use two rme hdsp multifaces, 2 midiman delta1010s 
>>and there are a couple of other 8 i/o cards with ALSA support.
> I think to make sure that this is really what we need I'll have to
> provide a better description of the problem. We are developing a
> testbed for wireless voice transmission. We will have up to 16 active
> phones, that are independently used to receive voice samples. We have
> to record each voice transmission to a .WAV file (because this is what
> the quality measurement tool understands).
> To do this we will have to connect the 16 phones to a Linux box (prefered)
> and need the ability to save the voice sample to a file. Each sample is
> completely independent of all the other samples. Basically we need the
> ability to do "sox /dev/phonespeakerX phoneXsample.wav" where 0 <= X <= 15.
>>>Will we have 16 /dev/dsp devices [e.g. /dev/dsp0 .. /dev/dsp16]?
>>If you use jack you will have an easy to understand interface for 
>>routing the i/o's.
> Following your suggestion I glanced at jack. I'm not quite sure whether
> this is really what we are looking for.

So you are talking about designing an app which allows multitrack 
recording from a digital source but doesn't have any requirement to 
connect to a sound cards inputs?

It should be relatively easy to design your own app/script which takes 
the raw data and writes it to multiple files.

IIRC ecasound can read raw data and write it to a multitrack file.


Patrick Shirkey - Boost Hardware Ltd.
Http://www.djcj.org - The Linux Audio Users guide

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