Edirol UA-4FX on ubuntu 10.04

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Pablo
Established Member
Posts: 1265
Joined: Thu Apr 17, 2008 9:57 pm

Re: Edirol UA-4FX on ubuntu 10.04

Postby Pablo » Wed Dec 07, 2011 5:42 pm

do you know how to connect Audacity to JACK? It doesn't show up in JACK's connection menus.


With jack started, in Audacity: Edit -> Preferences -> Devices: Select Jack Audio Connection Kit. Did you notice that JACK is an recursive acronym? :)

Well, this is not all. Audacity is not very jack friendly. Its ports (portaudio) appear/disappear when you press/unpress the play button. Use the pause button as a workaround. For example, to record: Press Record, then press pause, make jack audio connections and finally unpress pause.

I am glad I helped.

Cheers! Pablo

ubuntuuser
Established Member
Posts: 188
Joined: Mon Jan 02, 2017 9:46 am

Re: Edirol UA-4FX on ubuntu 10.04

Postby ubuntuuser » Wed May 30, 2018 8:08 am

Some of the old Edirol usb devices (EDIROL UA-1EX etc) seem to use a 3 byte 24 bit format S24_3LE in advanced mode (96000hz) and Alsa needs to be setup for it in ~/.asoundrc.

Advanced mode can't do 96000hz duplex, so only record or playback can be chosen at any one time.

Assuming the Edirol is hw:1 (cat /proc/asound/cards)

jackd --realtime -d alsa -d hw:1 -p256 -n2 -r96000

or (also for the M-Audio Transit btw)

jackd --realtime -d alsa -P -d hw:1 -p256 -n2 -r96000 // playback

jackd --realtime -d alsa -C -d hw:1 -p256 -n2 -r96000 // record


~/.asoundrc

pcm.!default
{
type plug
slave sl3
}

ctl.!default
{
type hw
card 1
}

pcm_slave.sl3
{
pcm "hw:1,0"
format S24_3LE
channels 2
rate 96000
}

pcm.96000
{
type plug
slave sl3
}


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