Tweet
I've been trying to troubleshoot my current drum mis-triggers. What I get is when hitting the head and reviewing the recorded MIDI data I see one nice solid hit at the intended velocity, then, on the toms usually one extra extremely low-velocity mis-trigger immediately afterwards. On the snare it's multiples. They're nearly impossible to hear while playing. Cymbals all work flawlessly using the same physical piezos and I only noticed it affected all of my drums while reviewing the MIDI data for my 16" floor tom which is the single drum that does audibly mis-trigger.
Someone else suggested I plug the piezo directly into an analog input to view the raw waveform. It should always be a decaying sine wave. Any significant gaps in the wave will cause the module (Alesis Trigger IO in my case) to see that gap as indicating a new hit/event. I haven't pursued that much yet as I lack a decent waveform tool. Reaper is the host I use and it can record but it's tedious to zoom and view the waveform directly in Reaper, and even then doesn't provide the clearest view of the raw wave.
But I can clearly see the mis-triggers when reviewing the MIDI data. Here's an example. Mis-triggers appear to only occur during quiet/soft hits on TOM1/2, but occur all the time on TOM3 (floor tom) and the snare. I've eliminated mis-trggers on the kick with aggressive retrigger settings, but that doesn't impact playability as it's a single pedal and I'm not doing rolls on my kick.
TOM1 quiet, followed by mistriggers/ghosts
TOME LOUD, no mistriggers/ghosts
So, does someone have some particular tools to suggest to help me better analyze the piezo-output cause of the problem? I can then systematically start from the bottom (bare piezo) and work my way up (completed drum) to see at what point the problem starts.
If you want 3 pages of run-on text to read about my DIY build you can do so by reading this gem of a thread.
Someone else suggested I plug the piezo directly into an analog input to view the raw waveform. It should always be a decaying sine wave. Any significant gaps in the wave will cause the module (Alesis Trigger IO in my case) to see that gap as indicating a new hit/event. I haven't pursued that much yet as I lack a decent waveform tool. Reaper is the host I use and it can record but it's tedious to zoom and view the waveform directly in Reaper, and even then doesn't provide the clearest view of the raw wave.
But I can clearly see the mis-triggers when reviewing the MIDI data. Here's an example. Mis-triggers appear to only occur during quiet/soft hits on TOM1/2, but occur all the time on TOM3 (floor tom) and the snare. I've eliminated mis-trggers on the kick with aggressive retrigger settings, but that doesn't impact playability as it's a single pedal and I'm not doing rolls on my kick.
TOM1 quiet, followed by mistriggers/ghosts
TOME LOUD, no mistriggers/ghosts
So, does someone have some particular tools to suggest to help me better analyze the piezo-output cause of the problem? I can then systematically start from the bottom (bare piezo) and work my way up (completed drum) to see at what point the problem starts.
If you want 3 pages of run-on text to read about my DIY build you can do so by reading this gem of a thread.
Comment