Let's sort out the APC LED feedback

[janosvitok]

Hi guys,

I'm trying to sort out the issue with led feedback to APC20, APC40, APC mini, APC40 mkII, Novation Launchpad and similar.

So far I've got this:
protocol descriptions:

APC40 : http://6be54c364949b623a3c0-4409a68c214 ... _rev_1.pdf
APC40 mkII: http://6be54c364949b623a3c0-4409a68c214 ... l_v1.2.pdf
APC20: similar to APC40
APC mini: ?
Launchpad mkII: http://global.novationmusic.com/sites/d ... uide_0.pdf
Launchpad S: http://global.novationmusic.com/sites/d ... -s-prm.pdf
Korg NanoKontrol2: http://www.korg.com/us/support/download ... /159/1913/

How to light the button is described quite well in the manuals. Now how to turn the light off? Which devices need Note off and which Note on with velocity 0
and which will do with either way?

There are templates for APC20, APC40 and APCmini. Do they need to be used for LED to work? What about APC40 mkII?

Anything else I've forgotten?

[mcallegari]

There are templates for APC20, APC40 and APCmini. Do they need to be used for LED to work?

I think so, cause it sets the device in Ableton mode 2, which is how Ableton controls the APC LEDs.

Anyway, I'm curious about this topic too.
I asked Windows users to test if the initalization templates now work in 4.10.0 for Windows and nobody replied

[nedmech]

I'm up and running on 4.10.0_TEST-20150925 on Win7 with a Korg NanoKontrol2 with no observed problems, if that helps. Although I've never gotten the feedback LED on the Mark SET button to work - all the other buttons seem to echo the feedback on the LEDs just fine.

If someone wants to buy me one of the APC units, I'd be happy to test them too!

[Ovis]

NOVATION LAUNCHPAD MIDI CONTROLLER MOVES TOWARD OPEN SOURCE
http://hackaday.com/2015/09/30/novation ... en-source/
Maybe You will find it usefull some way

[mcallegari]

Apparently there's also this
http://www.music-group.com/Categories/B ... 64/p/P0B3N
Looks like a Launchpad clone :S

[rudi]

Maybe this helps.

Regards,

Rudi

[adriankapka]

Hello

To Akai APC 40 and 20 send templates . I use mode 2 .

Unfortunately for AKAI APC mini is only a change in the file midiprotocol.cpp and compilation of GIT

[janosvitok]

Adrian,

what's the needed change (I know I suggested the change, but to make sure)? QLC+ needs to send Note on with velocity 0 to set the light off?

Is the change this? remove lines 140-142 https://github.com/mcallegari/qlcplus/b ... l.cpp#L140

+ change line 147 to send something else instead of 0?

[adriankapka]

to turn off the backlight buttons, send " 0".

attached a modified file that I use

[janosvitok]

https://github.com/mcallegari/qlcplus/c ... 1441812b9e this commit adds the change from Adrian's midiprotocol.cpp. It can be enabled in MIDI plugin settings.
I've not tested it, so please somebody with APC MIni test current GIT.

[janosvitok]

Adrian, Massimo, maybe others:

I've noticed that numbering in your MIDI templates does not match current MIDI templates for APC devices. Ttemplates from miditemplates.zip count from 0. Current templates names Mode 2 match Mode 1 from Adrian's templates.
Adrian's templates match manual, so I'd prefer those, but that would affect backward compatibility with current setups -- everybody would have to update settings.
Although, as I read the manual, those modes do not differ too much and both should work with QLC+ similarly so it may not be such a deal after all.

What do you think?

[adriankapka]

My templates done according to the documentation AKAI, unfortunately I can not now find the pdf to the APC20. From what I remember between modes 1 and 2 is the difference in the use of feedback, and the most that can be seen on the behavior of the LEDs with encoders. Mode 3 in the APC 20 added since the buttons "CLIP LAUNCH" generate quite different codes than in other modes.

[mcallegari]

APC templates have been initially provided by Joep Admiraal. Unfortunately he's not in this discussion and there's no way with this forum to send him a notification.
Anyway, I'm pretty sure he knew what he was doing, so I would say "Ableton Mode 2" templates are the ones to be used.

[adriankapka]

The current template is a mistake because 0x41 is variable according to the documentation Mode 1. Both the APC40 and 20 list of identifiers is compatible only APC20 also has Mode3 .

Information from the documentation APC40
Mode Identifier Name
0 0x40 Generic Mode
1 0x41 Ableton Live Mode
2 0x42 Alternate Ableton Live Mode



As for the mini APC is a template that is not necessary, since the device does not have a variable modes of operation.

[Ovis]

Hm, what about feedbacks from next page function? How they work? And maybe there is mistake with frame enable/disable buttons, because i can't get no feedback for them with akai apcmini
Another thing, if I use flash function. LED are always on to green (default for function ON feedback).