Eurorack front end for the Pyramid: Polyend Poly 2

As both a longtime Pyramid and eurorack user, I wanted to put some light on what I am finding to be the best module for using my Pyramid with eurorack, the Polyend Poly 2. I’m certainly not trying to sway anyone from buying a Hermod, but as an already existing Pyramid user the Hermod has always struck me as overlapping too much with what I’d already have done with the Pyramid. Consequently, I’ve thus far used other midi to CV modules (MI Yarns and Hex Inverter Mutant Brain), but the Poly 2 renders all other options pointless with the Pyramid.

The main reason is that the Poly 2 will both power the Pyramid from your rack and allow up to 8 CV/gate pairs from it, allowing you to power the sequencer and use the USB midi tracks to sequence your modular, leaving the physical midi ports on the Pyramid free for other gear. Any of the outputs you’re not using for CV/gate can be used for midi CC<CV, leaving quite a bit of modulation options from your Pyramid.

I’ve been playing with this for the last week, and it’s really everything I’d hoped for when Squarp first announced that they were making a eurorack module. As a Pyramid user, I’m finding this really allows me to unleash the full power of the Pyramid in euro.

Arguably the only thing I’d want for are more outputs (which I believe the original Polyend Poly V1 has)…I’ve not yet actually found that to be an issue for me but I’d always prefer more, of course. The Expert Sleepers FH-2 could accommodate that with expanders to my knowledge, but would require both setup (the Poly 2 is literally plug and play from the Pyramid, and easy to adjust from the module), and I’m not sure that it would power the Pyramid like the Poly 2 does.

Anyhow, just wanted to throw this out there since I’m not sure anyone else has tried this combo, and it works so well that it shouldn’t be overlooked.


I agree. I use a Pyramid with the Poly 2 and it works quite well. No dis to the Hermod, but like Accent says, Hermod duplicates a lot of the functionality of the Pyramid. Poly 2 can do 5 channels of Gate, CV, Velocity, Mod and Aftertouch. Great combo.

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Have you had luck connecting the Poly 2 with the Pyramid via usb (for midi and power)?
My Poly freezes constantly if I try this setup (but works ok with regular MIDI cables).
I downloaded the latest firmware which should address some reliability issues of the usb host connection but to no avail.
(I’m powering the Poly with a Make Noise skiff).

No, I power the Pyramid from a wall wart and connect via MIDI cables. I don’t like to add extra load to my Eurorack power supply.

I see. I’ll probably end-up doing the same. Thanks for your input.

I think the Pyramid pulls quite a lot of power when it initially powers up, which can cause issues…

ive got the pyramid connected to an iConnectivity mioXM, and occasionally when starting up the pyramid, the mioXM will power it off again.
also I see endorphins with the shuttle control, seems to have some issues

shuttle control manual:

• Squarp Pyramid – works if Shuttle control and Pyramid are boot at the same time (via USB). Pyramid needs to be fully booted before the Shuttle Control finishes initializing, then it works fine. If the Pyramid gets unplugged or turned off, it no longer functions (working Pyramid cannot be hot-swapped in or turned on after the Shuttle Control has finished booting)

I haven’t had problems with powering it up (it never turned off again). Mine is more of an issue with how it communicates with the Poly 2. At some point I get some sort of freeze on the Poly 2 side while the Pyramid seems to continue working fine.
My Euro psu should handle 1A on the +5v rail (Pyramid apparently needs 500mA) which also points me to some usb-host related issue,I think?

in my experience, usb hosts issues are often power related :wink:
what could be interesting is to try with one of the USB Y cables, which allow you to take the power externally for a usb device.

are you sure the poly2 pulls from the 5v rail? I think its more likely it will be pulling from the 12v rail, and then use its own 5v regulator to pull it down. (this is more common)

not really an issue for me, as Id use the mioXM between pyramid and poly2.
Im just trying to decide now between the new KeyStep pro, poly2 or endorphin shuttle control… I think the poly2 currently has the edge.

I was now looking for the Poly 2 power specs in the manual and found out that it actually has a switch on the back of the unit to switch to 5v for “power hungry units”. Will report back if that solves my issues as soon as I’m back in the studio.
EDIT: it works!



I tried the Poly 2 and sent it back. I had clocking issues - wouldn’t clock at 24PPQN. I have an FH-2 + expander and it’s great. Powers the Pyramid and has a crazy amount of features.