Re: [LAD] JACK on Gigaport HD+ at 4800kHz (reduced channel count)

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To: <linux-audio-dev@...>
Date: Tuesday, February 25, 2014 - 2:56 pm

On Tue, Feb 25, 2014 at 02:25:25PM +0100, Jörn Nettingsmeier wrote:

> If the maximum channel count is always fixed by the hardware, what

The -i and -o options probably work on 'plug' devices (and on aloop),
but AFAIK they are useless for hw: devices.

While developing zita-alsa-pcmi I wanted to add parameters to select
channels - this just never worked, only one value (all channels)
being accepted in all of the tests I did. So now it works the opposite
way: you open the device and then read the number of channels that are
available. When using the mmap access mode it's easy enough to read/write
only the channels you want and to ignore the rest without any overhead,
so in practice this not a problem.

Ciao,

--
FA

A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)

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Messages in current thread:
[LAD] JACK on Gigaport HD+ at 4800kHz (reduced channel count), Jörn Nettingsmeier, (Mon Feb 24, 10:35 pm)
Re: [LAD] JACK on Gigaport HD+ at 4800kHz (reduced channel c..., Jörn Nettingsmeier, (Tue Feb 25, 10:08 pm)
Re: [LAD] JACK on Gigaport HD+ at 4800kHz (reduced channel c..., Jörn Nettingsmeier, (Tue Feb 25, 1:25 pm)
Re: [LAD] JACK on Gigaport HD+ at 4800kHz (reduced channel c..., Fons Adriaensen, (Tue Feb 25, 2:56 pm)