[LAU] using Jack an interface to ecasound

Chris Caudle chris at chriscaudle.org
Tue Jan 17 21:31:48 UTC 2017

On Tue, January 17, 2017 2:58 am, john gibby wrote:
>> I'm having trouble setting up Jack to interface between my digital piano
>> application (pianoteq) and the ecasound audio processing app.  I'm using
>> ecasound with Ladspa plugins to create a crossover network.  Ecasound
>> splits the 2 pianoteq channels into six (woofer, mid & tweeter), and
>> sends them to my analog outputs through alsa.

That is a very odd way to use jackd.  The usual way is that jackd controls
the audio interface.
How do you even configure ecasound to present a jack interface and also
connect to the ALSA hardware directly?  Most software supports using
either ALSA directly or jack, but not both simultaneously.

If you want to continue to use ecasound the more typical way would be
configure jackd to control the output hardware, configure ecasound to use
jack, and then use whatever connection configuration tool you want (e.g.
qjackctl or jack_connect) to connect the output of your audio applications
to the inputs of ecasound, and the outputs of ecasound to the sound card.

As others pointed out something like zita_lrx might fit into a jack setup
more easily, but if you already have ecasound configured and ecasound can
use jack then the setup I describe above might be the easiest way to
modify what you currently have.

Chris Caudle

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