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BPM not changing via Carla

Posted: Fri Apr 10, 2020 10:09 pm
by hellocatfood
I'm using Giada 0.16.2-x86_64.AppImage on Ubuntu 19.10 with jack. I change the tempo using Carla but the tempo number in Giada doesn't change and the beat counter keeps going at the same speed. Is there somethign else I need to do to get it to sync?

Re: BPM not changing via Carla

Posted: Sun Apr 12, 2020 7:45 pm
by FFT
Hey hellocatfood, did you try the other way around, i.e. to change the tempo in Giada? Does it work that way?

Re: BPM not changing via Carla

Posted: Sun Apr 12, 2020 9:30 pm
by hellocatfood
I'm using Giada with Jack and so the BPM field is greyed out and it won't let me change it. I can change bpm if I use Alsa as the backend but I need to use Jack.

Re: BPM not changing via Carla

Posted: Thu Apr 16, 2020 7:49 am
by FFT
Oh yes, I forgot that Giada works in Jack "slave" tempo mode, my bad. So I have another question: does the BPM value change when using a different Jack-based software (e.g. Ardour)? Sometimes the jack bpm information is not sent correctly across jack clients.

Re: BPM not changing via Carla

Posted: Fri Apr 17, 2020 3:26 pm
by hellocatfood
I've tried using Ardour to change the BPM as well (it's using Jack) and it still doesn't update in Giada.

To be sure, opened Giada, Carla, Ardour, and Qjackctl. Changing the BPM in Ardour affected Qjackctl and Carla but not Giada.

Re: BPM not changing via Carla

Posted: Sat Apr 25, 2020 8:07 pm
by FFT
Alright, I was able to reproduce the problem by using Ardour + Giada through Jack. The bpm change signal is received correctly but interpreted the wrong way.

So thanks for the bug report, this will be fixed in the next (and upcoming) version 0.16.3.