Trellis M4 open source grid controller

jedgar · 2019-11-18T05:18:18.205Z

No worries, totally get what you’re saying. The Learn Guide examples for Untz and some of the NeoTrellis ones are a leaping off point only, and require concerted work to do things like slaving to MIDI clock or acting like a monome grid. This is the reason I’m excited that @okyeron and @TheTechnobear are interested : ]
As far as differences, yes the NeoTrellis boards are RGB (and use the ATSAMD09 “seesaw” chip to drive things), vs. original Trellis being a single color LED PWM’d w the HT16K33 LED driver. The Feather M4 is a great board, but I think the Leonardo would have been up to the task of acting like a solid grid controller, so really I think the biggest factor will be the software.
So, no pressure guys, but it would be amazing to get @TheTechnobear and @okyeron 's brains on this : ]

jedgar · 2019-11-18T05:21:19.815Z

Also, here are the vector files for both the 16x8 hellaUntz and the 4x4 & 8x8 NeoTrellis boards. Some mashup of these will help yield a 16x8 NeoTrellis + FeatherM4 enclosure.

thopa · 2019-11-19T08:37:21.660Z

Yes i was a little bit letdown by the very few Untz examples.

Overall i think its a great idea and controller, but to get the most out of it you need to dive deep into the arduino code. I though just a simple slaved clocked sequencer would have been great.

I guess i was wrong when i build them thinking they would just work tweaking the code, but my arduino knowledge is limited

There is some work going on at the moment by serveral people @beepboop @license apart from the people we have already mentioned, so the future is looking great!

outoftunewolf · 2020-01-08T20:32:32.328Z

So Trellis M4 I have is setup to do the ARP at the moment and it works with my DIY norns shield I put together but its limited. i’d like to make the thing more useful and versatile for the setup. any ideas or places i should start to investigate? Also, i use a mac.

Thanks!

jedgar · 2020-01-10T02:27:49.152Z

I’ve used the mine on Fates in pretty much the same way, with a modified version of the Arpy code. If you want to explore using it for other things in your setup it may be helpful to dig into the Arpy code in Arduino and try modifying it and the settings.h file. https://github.com/adafruit/Adafruit_NeoTrellisM4/tree/master/examples/arpeggiator_synth
@okyeron is working on a NeoTrellis grid, however it’s using multiple NeoTrellis driver boards and not the all-in-one NeoTrellis M4. But that code could serve as inspiration for doing more monome-like things with the one you have, depending on how much coding you’re up for.

okyeron · 2020-01-10T02:29:48.442Z

I’ll maybe do a version of the Monome code to work on the M4, but it’ll be a limited experience with most scripts on just a 8x4 button grid.

effiks · 2020-02-08T10:27:56.129Z

@okyeron

okyeron:

I’ll maybe do a version of the Monome code to work on the M4, but it’ll be a limited experience with most scripts on just a 8x4 button grid.

That would be awesome.

@outoftunewolf I created a version of the ARP script of the Neotrellis M4 to work with USB Midi clock. @jedgar removed the synth engine, so it’s Midi ARP now. If there is a Midi clock, the ARP is syncing to it. Maybe thats helpful? Works great with Orac.

okyeron · 2020-02-08T17:45:07.455Z

Oh cool.

I just “re-paneled” my M4 last night so maybe I’ll play with it a bit more today/tomorrow. (Need some longer screws now tho)

okyeron · 2020-02-10T03:18:35.281Z

M4 running my neo-monome code (proof of concept)

instagram.com

denki oto

130 Likes, 8 Comments - denki oto (@denki_oto) on Instagram: “Tiny Loom! #neotrellism4 hacked to #monome serial protocol with the Loom script running on…”

Would need to make a hex of this firmware for now. Requires a hacked tinyusb library, but im going to see if I can get changes submitted.

if someone wants to test this here’s a UF2 file. (Updated)
neotrellis_m4_monome.UF2 (1 MB)
Instruction-ish video here for flashing via our pal @jedgar

effiks · 2020-02-10T07:01:24.037Z

hi @okyeron, great news. I flashed the UF2 file on one of my Trellis M4 but Fates will not see it as Midi or Grid device (under System -> Devices). I use a normal (working) USB cable. Any idea?

okyeron · 2020-02-10T07:39:41.590Z

Right - you will need to do the diy device fix for Fates to see it as a grid. (with this firmware it’s grid only - no midi) Details here

effiks · 2020-02-10T07:58:07.439Z

Thanks @okyeron. With this firmware update it is now working and I slowly understand how Loom works.

Very cool. Now the Fates becomes even more useful and fun to play with.

instagram.com

@effiksmusic

4 Likes, 1 Comments - @effiksmusic on Instagram: “Thanks @denki_oto for the #trellism4 #diy hack for #fates and #grid.”

effiks · 2020-02-11T10:56:39.047Z

@okyeron would your code also work with the Adafruit 8x8 NeoTrellis Frather M4 Pack?

The Neotrellis M4 is great for travelling and mobile use. But now that I know what to do with a Grid I like a bigger on of cause for my “home studio“.

okyeron · 2020-02-11T16:06:21.552Z

Yeah it should, but I don’t have a feather M4 to compile against right now to make a UF2 file.

To compile yourself you would need to change a couple core Arduino files for TinyUSB. I may also need to update the repo

Maybe I’ll get an M4 this week to test

effiks · 2020-02-11T16:20:34.934Z

@okyeron no hurry, I have to order the Adafruit 8x8 NeoTrellis Feather M4 Kit Pack from overseas and it is not in stock at adafruit.com at the moment. I wanted to know if it is possible before ordering. It can take weeks before I have the kit. Or I have to order the different parts from different shops in Germany.

I don’t mind to compile it myself, if the modified core Arduino files for TinyUSB are available in future. Then I cloud change also the color of the LEDs, I like colorful light on black hardware .

okyeron · 2020-02-11T16:38:50.930Z

So far the small M4 is a proof of concept, so the others should work. But if you want to be sure before ordering, give me a week and I’ll do some testing.

effiks · 2020-02-11T16:42:47.090Z

Great. As I said, no hurry (there are other eurorack modules waiting to be purchased before. No I don’t have GAS, I can stop buying tech and modular gear any time, really).

jedgar · 2020-02-16T23:03:34.142Z

I’ve created CircuitPython code for triggering sequences and samples on the 1010 music blackbox using the Trellis M4: https://github.com/jedgarpark/JEP_NeoTrellis_Blackbox_Triggers (also a version there for a 4x4 NeoTrellis driver + Feather M4).

thynk · 2020-02-18T03:13:30.607Z

Happy to report mine works really well with Fates.

It’s SO portable!

Thanks again for all of your hard work @okyeron!

briangriffith · 2020-03-22T16:51:08.170Z

Can you do a the same thing for a Norns Shield?