Turning filter knob on Launchkey with key down = board unresponsive

#1

Hey there, I created the lead synth based on something in the 'Getting started with Axoloti' book.

Very exciting... so I connect the Noveation Launch key, and it mostly works... Thing is, if I keep a key down while opening or closing the filter, it appears to becomes unusable...

If I turn the knob with the key down... I just get what ever tone was playing continuously, and I have disconnect the power supply from the axoloti to get it to stop...

At first I thought this was a hardware issue, but while writing this, I'm wondering if it's a problem with the patch....

Here's the patch (let me know if it's not cool to post patches from the book here

Pasted image1354x518 55.5 KB

What do you think?

#2

what do you mean by 'unusable' or crashes... does the board disconnect?
you need to be more specific, post a copy of the text from the console if there is an error....

theres nothing wrong with that patch, as posted, and really patches should not generally be able to 'crash' the board (though its not possible :wink:)

I seem to remember @johannes has fixed something since 1.0.11 (so will be in 1.0.12) that caused some instability when initially going live, and the board disconnects - its not something Ive encountered, but seen some reports here.

#3

basically what ever note was playing when i started turning the knob stays playing and the board is unresponsive to any and all other input from the board...

.... and the knob cc is connected to the filter

#4

so, for example you cant change the dials in the UI?

also is it just the CC you have mapped to the VCF, or any CC you send?
also if you try a demo patch, and add a CC modulation to one of the parameters to that, does it work ok?

also try the patch a different way, rather than use modulation CC, try using a filter with a modulation input, and then feed in midi/in/cc

do you have another midi controller you can try? does it work as expected?

basically we need to isolate if its a bug in the midi handling, and if its specific to the launchkey, or in the midi moduation code...

also, its a good idea to attach your patch when you have an issue, others are more likely to try it, then rather than try to recreate from a screenshot.

#5

very good, will try all those things, and see what I find...
Thanks Technobear!

#6

so, for example you cant change the dials in the UI?

If I change it in the ui with a midi-keyboard key pressed down, it works well...

If I keep the midi key pressed down, then turn the knob, I can see that the filter control on the ui doesn't move (as it was before without the key pressed down). It stays where it is.

Upon further testing I figured out that if you move the knob slowly there is no problem, it's only when moving the knob quickly that it freezes like this.

After this has happened, I untick the live button, then click it again - no response, only silence. Then I restart the axoloti software - same result. It's only when I disconnect and then re-connect the midi-controller from the board, that I get a response again.

After this I found that I don't need to restart the software at all, it's simply a disconnect, and re-connection of the midi controller along with an untick and retick of the live box, that gets it working again.

also is it just the CC you have mapped to the VCF, or any CC you send?
I have it mapped to a specific cc

#7

I have replicated with a Math/*c control (so not just the filter) on a different knob, but I guess all the knobs (there are 8 along the top of the launch key) are pretty much the same.

#8

Sorry I don't understand you, I guess by modulation CC, you mean something that isn't a knob? ...and the rest of the above, I daren't guess, are you able to clarify a little please?

do you have another midi controller you can try? does it work as expected?

I'm afraid I don't have another controller with knobs at the moment.

also, its a good idea to attach your patch when you have an issue, others are more likely to try it, then rather than try to recreate from a screenshot.

Cool, thanks for the tip, I've attached my patch...

LeadSynthMidiChrous.axp (5.7 KB)

#9

rather than use the CC modulation that your using, use midi/in/cc and connect it to the pitch inlet on the vcf3

what Im trying to determine, if its just any midi is causing an issue , or something related to the way the modulation sources work.

I suspect its an issue with the launch key, as your patch is working fine with my midi controller..

the other thing you could do which will prove this, is if you plug the launch pad into the computer (rather than axoloti) and then forward the launchpad midi on the computer to the axoloti, I suspect it will work fine.