richbass
Posts: 3
Joined: Fri Oct 26, 2018 8:35 am

Midi - strip out all channels except channel 1

Thu Nov 08, 2018 1:22 pm

Hi All,

I’m trying to run QLC+ on my raspberry pi, but I’m hitting midi channel issues.

QLC+ is multi-platform software for controlling DMX lights; a custom image has been created by the developer(s) based on raspian stretch.

I have found what I ‘think’ is a bug, and I’m wondering if there exists terminal based software that can get me around the problem.

The issue...
I have a midi controller which is sending midi data on three separate channels (1, 2 and 3) simultaneously to three separate pieces of hardware. Channel 1 is data for QLC+, channels 2 and 3 are for hardware on my bass guitar pedal board.
When running on my Win10 laptop everything works fine.
When running on my RPi it’s as though the QLC+ software is set to omni channel mode (even though I’ve been through all settings I can find), which obviously gives weird results as it’s reaponding to messages intended for the other hardware.

My ideal solution...
Assuming I can’t find a proper fix within QLC+, the next best solution is to have software running on the RPi which acts as an interface between the midi data arriving at the usb port and the midi data read by QLC+. I’d like this software to take the data, strip out only midi channel 1 data, and make that available by appearing to be a midi device. This will need to be done via terminal based software, as the custom QLC+ image doesn’t have xwindows.

Is anyone able to help?

Thanks,
Rich

Andyroo
Posts: 434
Joined: Sat Jun 16, 2018 12:49 am
Location: Side of the hill in Lincolnshire

Re: Midi - strip out all channels except channel 1

Thu Nov 08, 2018 10:30 pm

There is this on IOT - but that would need another Pi I your situation https://solutions.sigmagine.com/ShowApp ... eLink.html

Maybe you’ll have more luck on their forum https://www.qlcplus.org/forum/ though this may be a similar problem that is due for a fx release https://www.qlcplus.org/forum/viewtopic ... a1d#p54139. Have to say the forum gets a bit worked up unlike the polite folks here :lol:
Need Pi spray - these things are breeding in my house...

richbass
Posts: 3
Joined: Fri Oct 26, 2018 8:35 am

Re: Midi - strip out all channels except channel 1

Thu Nov 08, 2018 10:38 pm

Hey Andyroo,

Thanks for this. I’ll check out the IOT link. Maybe there’s a way to make it work all on one pi 🤔

Massimo from QLC+ says he has identified the problem in the code now and that it’ll be fixed in the next release (out in a few days). So (fingers crossed) that’ll sort it and I won’t have to do anything else 🤞🏻

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