Re: New FreeBSD port ALSA to JACK MIDI, a2jmidid

From: Florian Walpen <>
Date: Sun, 27 Feb 2022 20:45:56 UTC
On Sunday, February 27, 2022 9:29:48 PM CET Hans Petter Selasky wrote:
> On 2/27/22 18:45, Florian Walpen wrote:
> > @HPS: Any ideas about the latency introduced by alsa-seq-server / CUSE?
> Hi,
> What tools did you use to test?

Just jack_midi_latency_test from audio/jack-example-tools, and the whole stack 
of JACK server, a2jmidid and alsa-seq-server from current ports.

> You might want to ktrace the applications in question to see what is
> going on.

I thought it's probably introduced by processing blocks of MIDI data, isn't 
that the case for alsa-seq-server / CUSE? Maybe a2jmidid?

> Is this something I could test on my computer?

Easy, see above. You need to loop the MIDI out -> in on your audio interface.

> --HPS