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Internal Crosstalk
Posted:
Sun Aug 19, 2012 7:46 pm
by bt430
I've got an internal crosstalk issue I can't seem to figure out. Here's what I'm doing. I've got a single piezo trigger which I'm plugging into each input to test my midi mapping. I've found that on 2 channels of the 8 I have programmed I'm triggering sounds on adjacent inputs. So 1 single mono trigger plugged into a MegaDrum trigger input is triggering sounds on 2 different channels. I've checked the programming, I've checked the source, I've messed around with crosstalk settings, fooled around with the thresholds but nothing seems to help. I'm hoping someone may be able to point me in the right direction!
Thanks!
Re: Internal Crosstalk
Posted:
Sun Aug 19, 2012 8:20 pm
by dmitri
Tapping bare piezos can trigger very high voltages and can cause false triggering on 2 adjacent inputs due to electromagnetic interference. Either disable unused inputs by setting Note to 0 or connect two piezos to both inputs.
Re: Internal Crosstalk
Posted:
Sun Aug 19, 2012 8:59 pm
by bt430
Dimitri it's not a bare trigger. It's an acoustic snare with a quartz cone trigger. At the jack I've got a 47K resistor across the leads to cool it off. I had set all the other parameters to 0 when I was troubleshooting.
Re: Internal Crosstalk
Posted:
Sun Aug 19, 2012 10:38 pm
by dmitri
Is it a dual piezo pad? If not, disable the Rim input.
Re: Internal Crosstalk
Posted:
Sun Aug 19, 2012 10:56 pm
by bt430
No it's not. All my drums are acoustic with one piezo trigger per drum. I don't run multiple piezos. I use real brass so I'm not running hihat or cymbal inputs. I set all the rim input notes on all the channels to 0. Is that the right way to disable them? My sound source is on MIDI channel 10 so I set the midi channel to 9 on all the unused megadrum inputs hoping maybe that would help. Don't know if this is a clue but the channels triggering are aux channels.
Re: Internal Crosstalk
Posted:
Mon Aug 20, 2012 11:23 am
by dmitri
bt430 wrote:No it's not. All my drums are acoustic with one piezo trigger per drum. I don't run multiple piezos. I use real brass so I'm not running hihat or cymbal inputs. I set all the rim input notes on all the channels to 0. Is that the right way to disable them? My sound source is on MIDI channel 10 so I set the midi channel to 9 on all the unused megadrum inputs hoping maybe that would help. Don't know if this is a clue but the channels triggering are aux channels.
You can disable any input by setting the Note to 0. Are you saying that even setting Note to 0 on Aux inputs doesn't disable them and they still trigger?
Re: Internal Crosstalk
Posted:
Mon Aug 20, 2012 11:05 pm
by bt430
No if I set them to 0 then nothing triggers.
Re: Internal Crosstalk
Posted:
Tue Aug 21, 2012 8:54 am
by dmitri
Then if nothing is connected to them, just disable them.