Percussa Super Signal Processor


yeah, I can understand that as an initial impression…

however, I think for these kind of devices ‘UI’ is really important, so whilst the patching would not be unique to the SSP, the SSP larger display is still a real advantage for ‘performance use’ , as you don’t have to cram the information onto the smaller display.

I think this is where there is both a ‘danger’ and opportunity for Percussa in serving its SSP customers.

the danger is being tempted to resort to the lowest common denominator, by creating patches/software that works on both the SSP and mSSP, but not taking full advantage of the SSP.

however, this is also the opportunity - Percussa could really, push forward using the bigger SSPs display (and IO) - to demonstrate why the ‘upgrade’ is worth it, less ‘screen flipping’, scopes - use the screen real estate wisely.

generally, I think they are taking the right approach, these days its not viable to artificially limit one device, to ‘prop up’ another, rather you have to make the case for the premium model on its own merits.

I do think , if you have the budget (and HP), I think the SSP form factor will be much more comfortable, this is almost always true of multifunctional devices.

also lets not to forget, if Percussa can bring in more users, increase the size of the community then im sure that’s going to be beneficial for all customers.

all that said, they are quite a way off their goal, so that’s quite a big IF…


the big SSP has 16 inputs and 8 outputs, and the mSSP has 8 inputs and 4 outputs.

All inputs and outputs are DC coupled, -5V to +5V range, and use the same high quality audio converters supporting up to 192kHz sample rate and 32 bits of resolution. The inputs and outputs support any type of signal (audio, CV, triggers, gates, etc).

the SSP has 40 times the processing power of a cortex-M based eurorack module (a common type of CPU used for DSP). Besides that you have a lot of I/O. So it’s normal that it needs more power.

You can power the SSP off a $20 meanwell RT50B power supply if you need more power in your rack. It’s a really small supply that works well. I can recommend the LIBB bus board if you want a bus board to go with the meanwell.

there were only 3 early birds because doing this module for $549 in a kickstarter is extremely competitive and incredible value for money and we cannot afford to sell it for less. The module will be $799 after the kickstarter and we can only do this if the kickstarter gets funded. We have to buy large part quantities to do this.

the amount of work and engineering is substantial and we can’t do this module unless the project gets funded. By spreading the word we can get more backers on board :slight_smile:

I don’t know if this is clear but you get 50 patches with the mSSP. A lot of eurorack modules have maybe 5-10 modes (=patches) if they support multiple modes and are DSP modules. So you get a lot. But anyway, today we announced a Mac and Windows editor so you have full editing possibilities.

The mSSP will use the same processor as the SSP.

We’ve now announced a Mac/Windows editor so you can create and edit all the patches you want. That said, the mSSP will ship with a collection of 50 (!) patches, which I think is really generous.

there are still a lot of differences between both devices, including the I/O and screen, see the comparison table. The editor will work with the big SSP as well and on the big SSP you have full editing possibilities right on the device itself.

So with the mSSP campaign we were never going to “artificially” limit anything. The mSSP feature set was chosen carefully so we could realistically do the project. Developing software takes a lot of time and costs money, so we couldn’t simply rework the entire SSP software and make it run on the mSSP. We had to choose what we could do, we’re not some big company but a really small operation of just a few people. And besides software development the mSSP requires hardware engineering as well since the carrier boards and CPU board will be different from the SSP.

The mSSP was suggested / requested by the community. We’re working on more patches and demos and will be posting those while the campaign is ongoing.


just crossed the 25K, thanks to all backers :slight_smile:

for those who haven’t seen the editor mockup yet -

The past days we worked on more patches and videos for the Percussa mSSP kickstarter. Here is the first one in the series we’ll be posting: a subtractive synthesis patch featuring 32 modules running in parallel on the mSSP: each voice consists of 2 oscillators + SVF + 2 ENVs + MIDI. There is also an fx chain built into the patch and we apply external SVF cutoff and FM modulation in this video as well (using make noise function and intellijel dixie II modules).

read the full update at


a nice granular demo for the mSSP

more details in the KS update


glad you like the granular demo :slight_smile:

there was a question today from someone if there is an I2C bus on the mSSP and SSP. The answer is yes, the expansion connectors on the back have an I2C port you could use and access via the linux OS.

If there are any developers here in the forum who want to use it for hooking up monome or other devices we’re happy to help out.


Mid campaign progress appears slow, but steady. Fingers crossed for a last minute backer surge!

I saw ads on CDM and ModularGrid. Both placements make a lot of sense.


@greaterthanzero glad you like the mSSP, here is the latest video -

Multi-timbral / Multi-Voice FM and sampling demo on the Percussa mSSP

Layered FM and sampling multi-timbral demo, in which we tweak ratio/detuning parameters of FM operators of the FM part of the patch. Each voice in the patch consists of 2 sine oscillators with amplitude envelopes, as well as one sample player, looping a vocal sample. The voices go to an internal bus and reverb module. In the second part of the video we switch to a different FM patch without sample playback in the voices, where we tweak amplitude and modulation envelopes of the FM operators. All sound synthesized on the mSSP and recorded on the big SSP.

Back the Percussa mSSP at

Sample by elnaturel on, see

Also check out this video - Additive synthesis demo with sequencing


wow a really thorough walk through video now available.

only 2 days to go, and still a way off target - but definitely the rate of backers has increased over last few days,
now at $50k, and 87 backers … so needs a bit of a push now.

hopefully the last few videos will help new backers see what they are potentially missing out on. its a really powerful module for $550… I’ll be really disappointed if it doesn’t make it.


Last day, and a ways to go. It’s intimidating if you measure in dollars. Or percentage. But really, we just need 117 more people to buy a unit.

(yeah, I made a spreadsheet. what of it?)

117 people who held off 'til the last minute. Who needed to save a few dollars before they could commit. Who just need a friendly reminder that this is the time.

It’s a lot. But it’s actually sort of plausible.


I’ve been watching this for a bit, and it keeps getting more and more interesting. I didn’t realize today was the last day, so made a pledge, although it doesn’t look like it’s going to make it.


quite a few backers have joined today and yesterday. We’re 1 backer away from 50%. Europe will wake up in a bit. We can do this!

@sduck thanks for backing!

here is an interview I did a while ago on the history of the mSSP and SSP and why great sound matters in eurorack -


so whats going to happen now? Im now interested and will back it but your not gonna make it…
Can you have a second kickstarter? I guess why not?
Can you see the amount of interest since youve done videos Bert?


Kickstarter will generally allow you to restructure and try again, but trying again without changing anything, or even explaining why you expect to be twice as successful the next time around, they’re never too keen on.

I’d say wait a bit, and come back when you can…

  • Put the new editor front and center

  • Show the next hardware iteration, and highlight its changes (red cursor buttons for clarity, higher screen framerate for LFOs), just to quickly demonstrate that the product has improved since we’ve last seen it

  • Make a new “overview” video, and place that in the “campaign video” slot since many users don’t even scroll far enough into the description to where your videos were this time.

  • Demonstrate specific hardware integrations (MPE demos w/ roli, linnstrument, sensel morph, Jouee, maybe KMI) and coordinate with those manufacturers to have them share your demos before and during the next campaign.

That’s more or less all I can think of right now.

(Out of curiosity, would there be any interest in a self contained version, like a more affordable System 8? Something midi-centric, perhaps? That would potentially create extra pledge levels, and draw interest from different markets.)

Anyway, I’d be happy to help on the video front, and I can bring an assortment of MPE controllers by.

Plus, NAMM’s just around the corner. Who knows what opportunities might arise there?

So, yeah. Running theme: don’t give up yet.

I’m sure you’re exhausted right now, but maybe hold off on a “the project is dead” announcement until NAMM is behind you.


2 hours left… come on everyone … lets make this happen :slight_smile:

lets focus on the positive…
without doubt in the last few days Percussa have been doing the right things, thats positively shown by how many new backers have come on board in the last few days/hours.

I think anyone that wants this to happen, should back it now…

even IF it doesn’t make target, the more people that back it, the more Percussa will be able to see that their is the demand required, and will be much more likely to find a way to make it happen.

so… back it now, even if you think it might not make it :slight_smile:


Precisely! It is so easy to armchair quarterback the particulars here. This is a huge thing for the modular world, and for synthesis in general. DSP power to the masses!


Even the prototype is an amazing accomplishment, and I commend Bert for insisting on a harder path for himself to make the unit affordable for more of us. (That the armchair quarterbacks keep attacking this particular detail is frustrating, to say the least.)

I hope I haven’t crossed that line myself. It’s certainly possible. I’m trying to be constructive, and aim my comments squarely forward.

(Perhaps more important, my offer to help is real. We’re both in SoCal, and I’d make all of my skills and equipment available, if there’s a second rally to be had.)


Some follow-up on Facebook:

Just confirmed, no account is required to read that, though you will need one if you want to reply there.


happy new year, good health and success to all of you !