I’ve been working on a few projects for Adafruit using the Trellis M4, and thought people here may like to check it out. It’s an open source 8x4 button grid with RGB LEDs so, unlike the original Trellis, you aren’t stuck with just one color and loads of soldering anymore. Also, the microcontroller (ATSAMD51 M4) is built onboard, as well as an accelerometer (which I’ve been using for highly dramatic filter sweeps and pitch bends).
We’ve got Arduino and CircuitPython both running on it, sending USB MIDI and serial MIDI over the UART port.
To do synthesis or sample playback on it, we ported Paul Stofreggen’s amazing Audio library from Teensy over to it as well.
Here are the tutorials we’ve made so far, including a neat Arpeggiator Collin Cunningham just wrote inspired by Polygomé. I’d love to see what people here make of it/make with it.
I don’t have an Ansible yet, but I’m hoping to get one to see how I could better integrate Trellis M4 into my modular setup. Right now I’m using a Deopfer Dark Cloud to go Trellis M4 > DIN-5 MIDI > CV & Gate.
We’ll have another batch in stock pretty soon, I’m not sure of the exact date. There are also some AdaBox 010 subs still available, and without explicitly revealing the contents, it’s probably a good one to get if you want a Trellis M4…
Just grabbed one of these! It looks very promising. There’s a simple tutorial on integrating the pjrc audio library
The workflow reminds me a bit of Axoloti, with a few extra steps. The neo-pixels are extremely bright and very responsive. The conductive pads seem a bit finicky, sometimes activating rows.
I like it so far! Although I’ve only played around with some demos. I feel like you could easily elaborate on the platform too. A companion board with an OLED and encoder like the Zoia would be killer.
Good to hear – one tip I have on the buttons is to add another layer of laser cut acrylic on top and use longer screws to get the buttons more flush to the top surface. This seems to reduce the off-axis wobble of the elastomer pads and improves the feel. You could also add some spacers if you don’t have easy access to a laser.
The M4 Neotrellis is 8*4, so you’d need a cluster of 4 to recreate a 128 Monome grid. @jedgar the 5 pin fin connectors on the side means the M4 Neotrellis is expandable like the older trellis boards? I guess you would just have to desolder some of the jacks to get it mounted flat.
As far as tiling them goes, yes, that’s how the side connectors are intended to work. You can tile up to 32 4x4 NeoTrellis driver boards on the I2C bus of the NeoTrellis M4 (the 8x4 one that includes the microcontroller). Here’s a forum post of someone who added two of the 4x4 driver boards to a NeoTrellis M4: https://forums.adafruit.com/viewtopic.php?f=59&t=146778&hilit=neotrellis
Yes, great point – it seems the more direct approach so only one NeoTrellis library is needed is Feather M4 as microcontroller, and all the pads are w the 4x4 NeoTrellis driver boards.
Quick jam with the Arp Demo (sorry for quality) NeoTrellis script modified for hold mode which is a polygomé-esque sequencer. Swapped the Neo-Pixel colours around to match my Fates Using Passersby which is wonderful. Very neat combination!
Using Passersby which is wonderful. Very neat combination!