What is Reddit's opinion of Goedrum Pack of 5 Prewired 35mm Piezo Disc and Double Sided Adhesive Foam Circle?

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I bought my replacement piezo triggers on Amazon! They’re GoEdrum triggers and they work (in my opinion) much better than the stock. I put the link but I think they are out of stock on Amazon.

Im no expert but I think any brand of piezo will work. It probably comes down to quality when choosing.

GoEdrum Piezo triggers

The Teensy 2.x and 3.x are excellent for this, already have MIDI code for them, and have been used in many MIDI controllers. The larger versions have plenty of input pins, both analog and digital, to cover what you want to do.

But signals loose definition and gain noise over long wire runs. Even the length of an arm might be enough to disrupt analog signals. Something like a 328P, or an even smaller ATTiny, on each hand could communicate to the Teensy in the middle.

If you decide to try simple first, use shielded cables. Both CAT 5e and CAT 6 come in shielded versions, but they're a little expensive. If you know someone in IT, see if they have some scraps you can use. If you only need one pair of wires, shielded microphone cable is much cheaper.

For drum-type sensors, everyone uses piezo disks. Even pro drum sensors use them, and they're cheap! You can just glue them to your shirt and they'll work. Some kind of solid base that holds it still and allows the piezo disk to 'flex' will increase sensitivity and give you better repeatability . A solid wood/plastic ring or a stiff rubber base would work well. It only needs to flex microscopically to generate a good signal.

When you get it running, post and let us know how it worked out.

Yep I ended up replacing the piezo with this:

Goedrum Pack of 5 Prewired 35mm Piezo Disc and Double Sided Adhesive Foam Circle https://www.amazon.com/dp/B01G8X1VX2/ref=cm_sw_r_cp_api_i_XAtSFbB18V1MP?_encoding=UTF8&psc=1

It was super easy but requires some soldering (and new solder).

Solved all my kick drum problems and now it works great.

Most affordable = DIY

Pack of 5 Prewired 35mm Piezo Disc and Double Sided Adhesive Foam Circle. Amazon: https://www.amazon.com/dp/B01G8X1VX2/

you'll need to solder a 1/4in TS patch cable to each piezzo, then double-side tape the piezzo to anything you'll be hitting with sticks (stick/dowel/tabletennisracket/

Alternatively, you can scavenge parts from a Playstation/Nintendo/... Rockband drumset (often found in thrift stores) and follow instructions like these (skipping the arduino2midi bit) basically only rewiring the piezzos already under the pads so they'll connect to your Alesis module https://www.instructables.com/id/Convert-Rockband-Controller-to-MIDI-Drums/

There's this, too:https://www.amazon.com/Goedrum-Prewired-Double-Adhesive-Circle/dp/B01G8X1VX2/

but you can probably get a single cheap piezo, too. 8" mesh heads are also available on ebay and amazon, just try finding a similar looking one. I tried Roland for my snare and they had a much wider rim. Simple Remo or Evans (black) heads are also sold in music stores. You might want to add a kick drum patch for extra protection and make sure not to use a felt beater.

No, but these work all the same. Is the other one functioning properly? Found this old manual btw: https://www.manualslib.com/manual/657091/Yamaha-Pcy65.html

It doesn't look like you have the dual zone one, so it should just choke. Since you wrote you tried a mono cable (which eliminates edge or choke), I didn't think that part can be the cause of the issue. It can be broken as a separate problem. Getting to it is probably trickier, since it's under the rubber. Have you looked at everything else inside?

It also has some level adjustment scew in the bottom.

Not sure what size this is, but you can by less piezos, e.g. five.