How to test that the selected Midi device is active?

[goodweather]

Hi,
it is possible to check that the selected input/output Midi device is in the list of available devices BUT is there a way to test that the selected input/output Midi device is active (same as smiling smiley in the menu)?

[Puppeteer]

Probably the easiest way is to send a universal SYSEX ID request

0xF0 SysEx
0x7E Non-Realtime
0x7F The SysEx channel. Could be from 0x00 to 0x7F.
Here we set it to “disregard channel”.
0x06 Sub-ID — General Information
0x01 Sub-ID2 — Identity Request
0xF7 End of SysEx

Ref: http://www.blitter.com/~russtopia/MIDI/~jglatt/tech/midispec/identity.htm

All synths (with sysex) should return a response to this that features the manufacturer ID and the Product ID. If the response matches the module you are expecting, then you know the inputs and outputs are set correctly.

edit: accidentally posted the PC3’s response to the universal request, instead of the request itself. Now fixed.

• This reply was modified 7 years, 12 months ago by Puppeteer.

The Puppeteer
http://godlike.com.au

[goodweather]

Thx. I’ll try that.

For the moment, I did something similar by requesting a Global parameters dump of 55 bytes but using your method will be better as I can test that any time.

I was indeed looking for something more robust as one can have different cases:

• synth not switched on when Ctrlr is started
• synth switched on after ctrlr is started
• synth switched off while panel is still open

The list of devices is a source of info but the best way to secure good communication would be to test your universal sysex exchange before each program/bank communication with the synth (I will not do this at param level).

[atom]

There is a property that should say if the device is currently open, i’ll post the location of it in Lua asap.

[Author]

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