How do I read the SysEx buttons in from my Artiria Minilab mkII?

bart · 2022-04-24 23:16:52 UTC

How do I read the SysEx buttons of my Arturia Minilab mkII ?

I would like to read the following SysEx messages

pad 1-8 / 9-16
In: F0 00 20 6B 7F 42 02 00 00 2F 7F F7 | Sysex
In: F0 00 20 6B 7F 42 02 00 00 2F 00 F7 | Sysex

shift
In: F0 00 20 6B 7F 42 02 00 00 2E 7F F7 | Sysex
In: F0 00 20 6B 7F 42 02 00 00 2E 00 F7 | Sysex

janvantomme · 2022-04-25 11:26:36 UTC

You'll need to write a custom object for that, since SysEx messages will vary depending on the manufacturer. There are some methods in the firmware that may be useful.

github.com

axoloti/axoloti/blob/46f6e4b383ce182da9dcca25b9d4b544fe20f990/firmware/midi_decoder.c

/*
 * midi_decoder.c
 *
 *      Author: jtaelman
 */

#include "ch.h"
#include "midi_decoder.h"


static const unsigned char StatusLengthLookup[16] = {0, 0, 0, 0, 0, 0, 0, 0, 3, // 0x80=note off, 3 bytes
                                               3, // 0x90=note on, 3 bytes
                                               3, // 0xa0=poly pressure, 3 bytes
                                               3, // 0xb0=control change, 3 bytes
                                               2, // 0xc0=program change, 2 bytes
                                               2, // 0xd0=channel pressure, 2 bytes
                                               3, // 0xe0=pitch bend, 3 bytes
                                               -1 // 0xf0=other things. may vary.
    };

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github.com

axoloti/axoloti/blob/46f6e4b383ce182da9dcca25b9d4b544fe20f990/firmware/midi.c

/**
 * Copyright (C) 2013 - 2017 Johannes Taelman
 *
 * This file is part of Axoloti.
 *
 * Axoloti is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * Axoloti is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * Axoloti. If not, see <http://www.gnu.org/licenses/>.
 */
#include "ch.h"
#include "hal.h"
#include "axoloti_board.h"

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trimardius · 2022-04-25 12:13:59 UTC

Maybe this thread could be useful?

bart · 2022-04-25 12:36:38 UTC

Ok, in that case I will try to use the two rotary knobs that have switches that send CC. I would love to work on a custom patch like you describe but I'm afraid I haven't time for that at the moment.Thanks for the reply. Bart

bart · 2022-04-25 12:39:31 UTC

Yes I managed to control the LEDS from Axoloti, but that is sending SysEx which is available in the api. To read the buttons I must be reading SysEx messages. Thanks for the reply, Bart

rook · 2022-06-02 04:33:21 UTC

Yeah, it looks like an object on its own can't implement SysEx reads, since the MIDI section doesn't have a signature that would support that. A separate MIDI SysEx section would be appropriate. If that SySex code is actually in the 1.x fw, then it might not be too big a leap to add such a section. I can't tell at a glance because this repo covers both 1.x and 2.x, but if the send code is known to be in there, that's encouraging.

I have a Korg padKontrol I wouldn't mind using in native mode w/ Axoloti, especially since it has a 3 character 7seg display. I even have the code ready to go from an earlier project.