Percussa Super Signal Processor

Audio I/O  

• 8 outputs via high end AKM DAC with 32 bit resolution / 192kHz sample rate (AK4458)   
• 2 inputs via high end AKM ADC with 32 bit resolution / 192kHz sample rate (AK5552) 
• Support for eurorack DC voltage level ranges on inputs and outputs (-5V to +5V) 
• Low-noise power supplies and op-amp stages, featuring 0.1% resistors 

Control Voltage I/O 

•  14 inputs via industrial ADCs or via AKM audio ADCs (see “status of project” section) 
• Support for eurorack DC voltage level range (-5V to +5V) 

DSP Processing 

• Quad core processor running at 1.8 GHz per core 32-bit SIMD and 64-bit floating point arithmetic 
• 32-bit floating point ADC/DAC input / output 
• Capable of running multiple software modules in parallel on multiple cores 

Synthesis Engine 

• Supports recording audio inputs and outputs directly to SD card for instant wavetable / sample creation or recording of live performances without the need for external software 
• Supports loading your own WAV files into the Wavetable Oscillator and Sampler software modules, via the SD card (limited only by SD card size / RAM size) 
• Coarse and Fine frequency controls on all Oscillators 
• Comes with a set of 100+ pre-recorded samples / wavetables 
• Storage and Recall of Presets and Settings with the press of a button 
• Rule-based fast 2D patching 
• Supports routing / mixing multiple inputs to multiple software modules 
• Supports routing / mixing multiple software modules to multiple outputs 

Included DSP modules (see stretch goals for additional modules)

• Wavetable Oscillator with true 3D morphing (XYZ) and cloud features
• Sampler with Layering features
• LFO with multiple waveforms (sine, saw, square, triangle)
• Variable Frequency Noise
• DC generator
• Enveloped Generator with Exponential A and DR
• Waveshaper
• Comb Filter
• State Variable Filter
• Step Sequencer  

Development Kit 

• SDK with examples for writing your own modules in C++   
• Support on the SSP to load your modules from the SD Card 

Display, Graphics and User Interface 

• 1600x480 pixel wide format full colour LVDS IPS display 
• 2D & 3D Graphics acceleration support (see stretch goals) 
• 4x High quality Aluminium Machined Knobs 
• 4x Bourns Endless and Click-less Encoders 
• 18x Industrial Temperature MEC Switches 
• User interface design featuring shallow menus (no menu diving), large fonts for readability and signal input / output Oscilloscope features 

Connectivity 

• 1 USB device port with USB Audio Class 2.0 support 
• 1 USB host port with USB MIDI class and USB ethernet adapter support 
• Serial (header) connector on PCB to access linux serial console 

Storage 

• 1 microSD card slot 16 GB professional microSD card (not included in DIY pledge) with FAT partition for easy sharing of presets and samples and for software updates (OS agnostic) 
• 2GB onboard RAM 

Dimensions and Front Panel 

• 60HP width, 3U in height (eurorack compatible, see pledges for customization options) 
• 50mm depth behind front panel (estimated) 
• 2mm thick CNC machined / laser cut aluminium front panel, sandblasted and black anodized (see pledges for customization options) 

Power 

• 350mA @ +12V and 50mA @ -12V consumption (estimated) 
• Standard 16-pin eurorack power connector