Stay with 3 triggers per drum, or drop to one for Positional Sensing?

[dreinmann]

Looking for more thoughts here (I love crowdsourcing and learning from what others have experience on).

In reading about eDRUMin's superior setup for positional sensing, I'm thinking about reducing my setup from 3 head / 3 rim triggers to 1head/1rim to allow for positional sensing.

Prior to this, I wasn't impressed with POS on my TD12, and got more out of this 3 trigger setup as far as eliminating hotspots and great triggering.

Any input from previous experiences here, or cool ideas?

[dsteinschneider]

I don't think many of us here have tried multi-cone head sensor setups and that's why no replies yet. The hotspot suppression algorithm works very well so a single center mounted sensor works very well with the eDRUMin plus you can experiment with positional sensing which works well with my center mounted piezos. I have an idea for you. You could build a disc that mounts to the three existing mounts and has the piezo in the center.

BTW, nice clean installation!

[Ronyd]

Hi

I have same setup. Did you dial in your setup ? What did use for pad preset? Settings?
Thankx

[djbclark]

Would be interesting to compare the performance of these layouts to the one Roland uses on their PD-140 snare - that is, one cone in the center and then 3 cones surrounding it approx 2/3 toward the rim. For a total of 4 piezos. (It also has an electrostatic sensor I'm going to start a thread about in a sec)

Here's someone playing with that:
https://www.vdrums.com/forum/advanced/d ... ired-build

1009942_Roland-head-trigger-basket-for-PD-140DS_2_800x800.jpg (32.88 KiB) Viewed 4119 times

[djbclark]

Oh and FYI from another thread:

Hotspot suppression only works with a single cone in the center of the pad. You can probably reduce the amount of hotspotting a bit by adding a 30k resistor in series with the piezo, but the eDRUMin hostspot suppression feature is not compatible with those pads.

viewtopic.php?f=34&t=951

[djbclark]

Another interesting thought from another thread:

For example, when I said I moved the rim trigger, I actually replaced it with a length of piezoelectric cable running the whole circumference of the snare drum, sandwiched between the hoop and the head's rim. Night and day improvement. Extremely consistent in all zones.

viewtopic.php?p=10947#p10947

[Luckymethod]

Another interesting thought from another thread:

For example, when I said I moved the rim trigger, I actually replaced it with a length of piezoelectric cable running the whole circumference of the snare drum, sandwiched between the hoop and the head's rim. Night and day improvement. Extremely consistent in all zones.

viewtopic.php?p=10947#p10947

that's interesting. The only issue I see is I believe positional sensing exploits the fact that the rim sensor is in one spot only to do the difference between the center and the rim sensor to understand if the hit is in the "close side" (Close to the rim sensor) or "far side" so to speak.

Having a sensor all around would make it impossible to perceive the full head, just the distance from the center which I guess is not much of a loss. Now that I think about it, it might not actually make any real difference cause hitting on the far side is still gonna reflect on the sensor as MAX 1 radius of delay.

[Luckymethod]

Another interesting thought from another thread:

For example, when I said I moved the rim trigger, I actually replaced it with a length of piezoelectric cable running the whole circumference of the snare drum, sandwiched between the hoop and the head's rim. Night and day improvement. Extremely consistent in all zones.

viewtopic.php?p=10947#p10947

can we see a picture of the build?

[Mr_Bluesguy]

hey guys- I made the post about the rim sensor piezo cable back in April. I was actually surprised to see it pop back up again. I went back and re-read it and I can definitely see where I caused some confusion. My poor wording indicated that there is consistency in all zones, which of course can't be true in this kind of set up. Sincere apologies for the confusion. I meant to indicate that RIM triggering is very consistent 360 degrees around the drum and there is complete isolation between rim and head. No third zone. Lesson learned- no tequila while posting!

[Mr_Bluesguy]

In response to requests for pictures of the build, here ya go.
Sorry, the pics are out of sequence, but you get the drift.
More pics in the next post

You can see where the piezo cable enters the shell under the 1/4" output connector for connection to the terminal strip.

Piezo electrical connection.jpg (114.82 KiB) Viewed 4061 times

I spliced the piezo cable to regular co-ax cable for full shielding. No really necessary, you can splice to individual leads. The inner core, which is wrapped with piezo film attaches to red lead, shield goes to black lead.

Piezo cable under rim_2.jpg (90.22 KiB) Viewed 4061 times

You have to get the cable to the outside of the rim. I used a grommet in a drilled hole.

piezo cable rim feedthrough.jpg (60.28 KiB) Viewed 4061 times