Digital oscillators – like the Mutable Instruments Braids, Synthesis Technologies Quad Morphing VCO & the Radikal Technologies Swarm Oscillator – have become some of the hottest modules in the Eurorack format.
Now AudioCubes creator Bert Schiettecatte of Percussa is teasing a Super Signal Processor (SSP) Euro module that’s sort of a futuristic take on the Moog Mother-32.
The planned module features a large screen, patch points on the right side of the module like the Mother-32, and controls that dynamically map to the module’s features. It will be able to be used as a Super Wavetable Oscillator and a variety of other DSP functions.
Here’s what Schiettecatte has to say about the module’s hardware:
This processing platform is one of the fastest ARM platforms available for synthesis. With its 4 cores running at 1.8GHz, it achieves about 28,800 DMIPS of processing power. Common processors in Eurorack modules are the single core Cortex M4 and M7 processors, which at their highest clock frequencies of around 200MHz stay below 500 DMIPS. Less common processors in Eurorack modules are the single core Cortex A8 at 1GHz, which offers around 2,000 DMIPS of processing power.
Because of the processing power it offers, this “super oscillator” will actually support running around 64 wavetable oscillators in parallel, and with sample rates up to 192kHz with 32 bit resolution. All processing is done using 32-bit floating point precision with 64-bit precision where necessary.
You will be able to chop up the samples you load to create different wavetables on the fly. The software will support scanning the wavetables in various ways with of course modulation possibilities using the CV jacks. In the mockup you can see that the encoders are mapped to coarse/fine pitch, scanning direction, position, keyboard tracking, position noise, and mod A and B which can be additional oscillator parameters depending on oscillator mode. The pushbuttons can be used to choose wavetables, step through the oscillators, change presets, etc.
The module will come with a 1600×480 pixel IPS display, full colour, and high-end AKM ADC and DAC (stereo in and 6 channel out). The display tells you what the push buttons and encoders of the module do. The modules have no printing on the jacks, buttons or rotary encoders because all that info is shown on the screen. The screen is NOT a touchscreen.
In addition to these high resolution/sample rate DAC/ADC chips there will be 16-bit ADCs to sample CV inputs (there are 24 connectors on the front site, 18 of which will be CV or gate inputs, configurable via the software to control pitch of oscillators or the various parameters of the oscillators). The stereo high resolution input can be used for sampling or to modulate parameters of the oscillators.
The module has high resolution endless and clickless rotary encoders (bourns) and high quality MEC switches (industrial type). The encoders have aluminium knobs on them, clear anodisation.
There will also be support for storing presets, and multiple oscillator modes. This way you can store many different routings between oscillators and input and output jacks and recall them with the press of a button.
The input signals will be routable to the oscillators however you want, and the output signals from the oscillators can be routed to other oscillators internally via software or sent out via the 6 output channels.
Schiettecatte also shared this preview of the 3D Morphing/modulation capabilities of the Percussa Engine Synthesizer’s Wavetable Oscillator. In the video you can see multiple wavetable oscillators (orange) modulated by multiple LFOs (green):
The module’s cloud feature will support up to 16 oscillator copies per WT oscillator, with controllable/modulatable spread,
Pricing and Availability
The Percussa Super Signal Processor (SSP) is still in the design stages, so pricing and availability are to be determined. Schiettecatte is planning a Kickstarter project to fund production of the module. You can follow the module’s development via Schiettecatte’s Facebook page.
Note: This post has been updated to reflect the current name for the planned module. The module was originally planned as a Super Wavetable Oscillator, but the module’s scope has been expanded to support a variety of functions and the name has been updated to reflect that.