MICHIGAN SYNTH WORKS UO_C ORNAMENT AND CRIME BLACK : USED : [DETROIT MODULAR]

Description

•  (Freescale MK20DX256 / 32-bit ARM Cortex M4).
• 4x precision CV outputs, 16-bit (TI ).
• output range: -3v/+6v, “in-the-loop” compensated, for proper DC accuracy (+ 9 calibration points per channel, settable in firmware); +/- 0.2mV error across a 9 octave pitch CV range is achievable.
• 4x CV inputs, -3.5v/+6.5v, 12bit, 100k input impedance.
• 4x trigger/gate inputs, threshold ~ 2.5v, > 100k input impedance.
• two rotary encoders, with built-in push switches.
• two push buttons.
• 128 x 64 pixel 1.3” OLED display (SPI / SH1106 driver chip).
• trigger-to-quantised-output latency < 100 microseconds.
• 16.67kHz internal timer (CPU overclocked to 120MHz), which is also the DAC update rate. the ADC is also read at 16.67kHz but in several of the o_C “apps”, 16 values are averaged to remove noise, meaning that the effective sample rate for CV inputs is about 1 kHz. Digital (gate/trigger) inputs are read at 16.67 KHz — this ensures very low latency.
• +/-12V power only, ca. 85mA power draw on +12V bus, < 10mA on -12V bus)

• the Ornament & Crime firmware is a collaborative  project by Patrick Dowling (aka pld), Max Stadler (aka mxmxmx) and Tim Churches (aka bennelong.bicyclist). It (considerably) extends the original firmware for the Ornament & Crime (o_C) DIY eurorack module, designed by mxmxmx.
• the original o_C module was designed to perform a single function: a digital, quantising version of the classic analogue shift register (ASR).
• there is still a quantising ASR (analogue shift register) function in the current Ornament & Crime firmware, now named CopierMaschine, but several other “apps” have been added, incl. quantisers, sequencers, LFOs, random/chaotic CV generators, and so on. These apps are selectable on-the-fly, without having to reboot the module or toggle the power.
• the o_C module, and the firmware for it, break new ground as a polymorphic module: a generic set of inputs and outputs are provided, and the textual OLED display is used to permit re-mapping of these inputs and outputs for each app, and in some cases, for each of the four channels within each app. The o_C module does not purport to be the paradigmatic pinnacle of polypurpose — in fact, as noted above, it was originally designed to fulfil just one purpose (ASR) — but together with the much-expanded firmware for it, we hope it provides an interesting and useful early step in the evolution of such multi-purpose modules.

The apps currently available in Ornaments & Crimes are:

•  is an enhanced version of the original quantising digital emulation of a four stage analogue shift register (ASR).
•  provides basic neo-Riemannian Tonnetz transformations of triadic chords, triggered by the digital (gate/trigger) inputs.
•  combines Tonnetz transforms with a “vector” sequencer - it can be both a chord sequencer and a melody sequencer, but not of the usual kind.
•  is a quad pitch quantiser for external voltages, with editable scales; it can do clocked (trigger-driven) quantising, or continuous quantising, with a latency of under 100 microseconds; it also features quad Turing Machines, May-Verhulst logistic maps or byte beats as optional, semi-random, internally generated CV sources.
•  is a dual-channel quantiser, similar to Quantermain, but also offering scale and note mask sequencing.
•  is a wavetable quadrature LFO, based on the “Easter egg” in the  module.
•  is a dual Lorenz and Rössler (strange attractor) modulation generator, partially based on the “Easter egg” in the  module.
•  is a quad voltage-controlled envelope generator, based on envelope generator code from the  module, but extending it with voltage control, additional envelope types, including re-triggering (looping) envelopes, additional segment shapes, adjustable trigger delays, and a unique Euclidean “trigger filter” which turns the app into a Euclidean rhythm generator which can output envelopes, not just gate or trigger pulses.
•  is a dual-channel step sequencer offering 4 “tracks” of up to 16 steps each; tracks can themselves be sequenced.
•  is a quad bouncing ball envelope generator, based on a hidden mode of the  module.
•  is a quad “byte beat” equation generator, which can be used as an audio source to generate curious but often interesting 8-bit noises and tunes, or which can be clocked by an external source to produce “byte beat” control voltage sequences. “Byte beats” were first  in 2011 by viznut (aka Ville-Matias Heikkilä).
•  is both a chord quantiser (sometimes called a “harmonic quantiser” for external pitch voltages), and a chord progression sequencer.
•  is an utility app that outputs specific reference voltages on each channel to help tune or calibrate VCOs and other modules. It also includes a high-precision frequency meter and note tuner, a high-precision BPM (beats per minute) tempo meter, and a closed-loop calibration mode.