[ubuntu-studio-users] 14.04 Some sound app not work when jack is enabled

Kaj Ailomaa zequence at mousike.me
Thu Nov 27 03:03:11 UTC 2014

On Mon, Nov 24, 2014, at 01:41 PM, WMID wrote:
> On UbuntuStudio 14.04 when I turn on Jack (QjackCtl) some applications
> that
> working only with Pulseaudio, example kdenlive not working, here a
> snapshot:

When you start jack, it will grab the sound card, which means pulseaudio
can't use it anymore.
You can still make pulseaudio connect with jack, making pulseaudio a
jack client. Default settings in qjackctl make this possible. After
starting jack, you will still need to set pulseaudio to use jack as its
output in pulseaudio settings - also, sometimes you will need to
reinitialize or restart any running pulseaudio applications.

To give you a practical list of steps to take:
1. start jack with qjackctl
2. in pulseaudio settings, set jack as the output
3. now, start any jack or pulseaudio applications

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