Unable to Export Audio

#1

Hi all,

I’m running Ardour v 6.9 (latest download) on Ubuntu Studio 20.04. I’ve been working on a number of different sessions and, all of a sudden, find myself unable to export audio in any of them. Previously, this had worked without a hitch.

I’ve tried exporting to redbook, mp3, ogg and flac to no avail. The progress marker does not move through the file and the progress indicator does not progress past 0%.

If I tick the ‘realtime’ box, the session will ‘export’ successfully, but now gets stuck on the ‘encoding’ stage.

**EDIT. I am using JACK. If I switch to Pulseaudio, export works OK. Still, it’s odd that that suddenly stopped working under jack… **

Am I doing something daft?

Thanks for any and all help!

#2

And in fact, the pulse audio workaround is cumbersome because all tracks become disconnected from the master bus and have to be manually reconnected.

Am I the only one who’s encountered this?

#3

Check your version of Jack.

There were older versions of Jack that suffered from bugs that caused issues like this.

 Seablade
#4

Also recent versions of jack2 cannot properly switch from/to freewheel export in some cases. Some users reported issues when the jack/pulse bridge was loaded.

#5

Thanks! I shall. I did spot those posts from 2016 on the forum but assumed that it couldn’t still be an issue.

#6

Well it just depends on your version, what I was referring to was fixed since then but many distributions don’t update quickly if at all until their next version, but as @x42 mentioned there is a new bug in the most recent versions as well apparently.

  Seablade
#7

Thanks. I seem to be running 1.9.12~dfsg-2ubuntu2. I know that the latest is 1.9.17 but perhaps I’ll wait for the distro update rather than try to build it myself.

I really appreciate the help. Thanks!

#8

Is there a specific reason why you want or need JACK?

If not, you’re much better off without it, prefer to use Ardour’s ALSA backend directly.

#9

Great question. Selecting ALSA as the audio system under Audio/Midi Setup in Ardour and hitting start

a) crashes ardour if jack is not running and I select my focusrite 2i2 as the input/output device
b) gives a cannot start message if jack is running and I select my focusrite 2i2 as the input/output device
c) gives a different cannot start message if jack is not running and I select no input/output device.

I have not investigated this bug yet however.

#10

You need to stop jackd first.

Also make sure you use Audio System: ALSA (not Audio System JACK, with driver ALSA) .

#11

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