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Raspberry Pi Forum jack & full duplex possible
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Related

jack & full duplex possible

e14 Contributor
e14 Contributor over 12 years ago

Hi all,

 

I was wondering if it's possible to use Jack?

If yes, is full duplex (in & out) possible?

What can I expect for the latency (less than 20ms, more than 100 ms)?

 

If not, with Alsa is it possible to have analog in & analog out working at the same time?

 

Off-topic:

 

Some people are talking about this distribution that is featuring low latency / jack solution:

https://ccrma.stanford.edu/~eberdahl/Satellite/

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  • e14 Contributor
    e14 Contributor over 12 years ago in reply to e14 Contributor

    Hi Rob,

    it depends on what you want to do. If you want to develop your files on a stable kernel version (which you should do) you should make use of the precompiled image provided by wolfson. My version is an unofficial version for testing purposes only built upon an git snapshot. If you use my version you are ALONE! You will get no support from wolfson and from me. Sorry.

     

    -Georg

    "Happiness is lack of information"

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  • e14 Contributor
    e14 Contributor over 12 years ago in reply to e14 Contributor

    Hi Georg,

     

    Thank you so much for sharing the precompiled rt-kernel for raspbian! It works very well, but I do get a lots of:

    delay of 228987.000 usecs exceeds estimated spare time of 11549.000; restart ...

    ...

    I am wondering if you get the same output in the console (I am starting jackd1 headless). Here's the full story:

    Wolfson Audio Card for Raspberry Pi - linux.autostatic.com

     

    Do you have any idea how to fix this?

    Thanks again!

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