MATRIXSYNTH: New Analog Bytes tbDSP Eurorack Module with Knob Touch Detection

Monday, May 19, 2014

New Analog Bytes tbDSP Eurorack Module with Knob Touch Detection


"tbDSP is a modular synth that’s currently under development. It will be available in 2014. Here is a picture of the current prototype (remember, the front panel aesthetics and screen graphics aren’t finalized yet)"

"With tbDSP we set out to create not only the most powerful DSP synthesizer platform in Euro, but also a platform that could evolve over time. At the heart of this goal is the ability to add functionality and make improvements once the module has been released into the wild. To support this, we put a USB port on the module and developed PC and Mac applications so that when a new idea pops into our heads, we can share it with everyone that owns the module. Likewise, it will allow users to influence development.

HP: 26
Engine Control Knobs
Coarse/Fine Toggle Button for Engine Control Knobs
LCD (2.4” diagonal, 320x240)
Selection Knob
Selection Enter Button
USB Port
Navigation Buttons
Navigation Shift Button
Inputs (+/-10 V, Audio or CV)
Outputs (+/- 5 V, Audio or CV)
Engine Buttons

tbDSP features three chips that share the processing duties:

Altera FPGA - graphics, SD, and audio processing
Analog Devices SHARC - floating point audio processing, FFTs
Microchip PIC32 - USB, Firmware Update, and housekeeping

The FPGA processes audio at sampling rates as fast as 98MHz, and the SHARC can compute over 24,000 1024-point FFTs per second."

You can find additional details and follow progress at http://tbdsp.tumblr.com. The following are a couple of videos and audio demos.

"My appreciation of the old Atari POKEY sound chip compelled me to recreate its guts in a tbDSP engine. Some might argue that doing so is a waste of perfectly good DSP, but I saw an opportunity to make an engine with features that I wish the original chip included. The new engine is called POKE. I want to cover two of the new features here."


Published on May 18, 2014 tb DSP·1 video

tbDSP Spectrogram Example



"POKE engine modulating LPF CV alone, then processing rate CV alone, then both simultaneously"


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