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Subject: Re: jack_umidi : Can't send MIDI to audio interface
To: Marcel Bonnet <marcelbonnet@gmail.com>
Cc: FreeBSD multimedia <freebsd-multimedia@freebsd.org>
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From: Hans Petter Selasky <hps@selasky.org>
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Date: Thu, 10 May 2018 15:54:46 +0200
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On 05/10/18 15:50, Marcel Bonnet wrote:
> I think the synth is listening : I set up Jack Keyboard to the same channel
> on the synth. And what really worries me about is the fact of USB Interface
> not blinking the MIDI output status light. So it seems the interface is not
> receiving any data from the computer.

You can test /dev/umidi0.0 and see if the led is blinking if you echo 
some 0xff characters there.

--HPS