Drum-tec Diabolo snare rim triggers too easily

[thijstriemstra]

I'm testing the Drum-tec Diabolo snare with an ESP32 and this snare config:

Pad	Type	MIDI note	GPIO
Drum-tec Diabolo	Snare	38, 40	36, 35

and it seems the rim is being triggered way too easily.

Here's a video and below that a screenshot with the associated Ableton midi notes, where you can see the velocities. The notes in blue are rim.

IMG_3478.mp4

[corrados]

See my following comment to adjust the Edrumulus pad parameters correctly.

[thijstriemstra]

I adjust the pad parameters like this:

  // SNARE (Drum-tec Diabolo)
  edrumulus.set_pad_type           ( 0, Edrumulus::PD120 );
  edrumulus.set_rim_shot_is_used   ( 0, true );
  edrumulus.set_pos_sense_is_used  ( 0, true );
  edrumulus.set_pos_threshold      ( 0, 4 );
  edrumulus.set_pos_sensitivity    ( 0, 17 );
  edrumulus.set_rim_shot_treshold  ( 0, 25 );

And this is the result (ps. im not a drummer! [yet]):

IMG_3485.mp4

As you can hear the rimshot is quite bad and I wasn't able to find the good parameters for it. It sometimes even does double hits and overall it's just really noisy/sensitive. I can simply disable it, I think this would fix a lot of issues with it randomly triggering, not triggering at all etc.

edrumulus.set_rim_shot_is_used   ( 0, false );

Also, I couldn't get the start of positional sensing MIDI note 16 to get really close to the middle after trying many combinations of params. The closest to the center I could get was a few cm under the logo on the mesh, and from there that area goes from 1 towards 127 at the edge of mesh. Having it even closer to the middle, and making the range larger would also be nice.

[corrados]

I assume it is a 12 inch Diabolo pad, right?

I have added experimental support for this pad now: 0300ec6

I see a strong "hot spot" effect and the positional sensing does not really work with the current algorithm. Would be interesting to know if the eDRUMin has correct support for positional sensing for this pad type.

BTW: I noticed in your videos that you have a high latency. For real-time usage I recommend to set the audio buffer in your DAW to a very low value like 64 or 32.

[thijstriemstra]

I assume it is a 12 inch Diabolo pad, right?

Think so.

I have added experimental support for this pad now

Nice! Anything I can test and how?

Would be interesting to know if the eDRUMin has correct support for positional sensing for this pad type.

I don't own one but I can check their documentation perhaps.

I noticed in your videos that you have a high latency. For real-time usage I recommend to set the audio buffer in your DAW to a very low value like 64 or 32.

I hardly experience any latency, quite the opposite. The video is recorded with an iphone 12, a couple of studio monitors for AD2 in the background, and the hits on the pads are quite loud, hard to say from a video if there's latency imo. Nevertheless, I am using 512, you're right and should try a buffer size of 64 and 32 samples as well. Drums we make here is always quantized, the latency is less of an issue then, and my drummer friend is very happy with results at 512. Also, jamming along (multiple) [live] midi vst instruments (e.g. serum, anything native instruments or izotope for example) requires > 64 to avoid popping.. But will give it a try!

SoI'll keep supplying any.wav files at 512 if that makes sense?

[thijstriemstra]

I don't own one but I can check their documentation perhaps.

From their forum:

drum-tec 13” Diabolo Hand Hammered Snare Pad works 100%, with Positional Sensing.

These are listed in the manual so considered officially supported but users have provided configurations that have worked... so good information to have.

Presumably the same pos. sensing tech?

[corrados]

I have added experimental support for this pad now

Nice! Anything I can test and how?

Yes, you can merge from main if you like.

SoI'll keep supplying any.wav files at 512 if that makes sense?

For the recordings you should has a large buffer size. Just for real-time usage, a smaller buffer should be used.

drum-tec 13” Diabolo Hand Hammered Snare Pad works 100%, with Positional Sensing

Your Diabolo wodden snare looks like this in the inside. But the Hammered Snare looks different when it comes to the piezo construction as you can see here. I am pretty sure they have different resonance behavior when it comes to triggering since the Hammered Snare piezo construction looks much more solid.

[thijstriemstra]

For the recordings you should has a large buffer size.

Ok.

Yes, you can merge from main if you like.

See #37