MXMXMX

Wiki and BOM 

Original Github

Original O&C Build guide

Alternative firmware options for O&C

the Ornament & Crime firmware is a collaborative open-source 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: 

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• CopierMaschine is an enhanced version of the original quantising digital emulation of a four stageÊanalogue shift registerÊ(ASR).
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• Harrington 1200Êprovides basic neo-RiemannianÊTonnetz transformationsÊof triadic chords, triggered by the digital (gate/trigger) inputs.
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• AutomatonnetzÊcombines Tonnetz transforms with aÊÒvectorÓ sequencerÊ- it can be both a chord sequencer and a melody sequencer, but not of the usual kind.
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• QuantermainÊis aÊquad pitch quantiserÊfor 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.
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• Meta-QÊis a dual-channel quantiser, similar toÊQuantermain, but also offeringÊscale and note mask sequencing.
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• QuadraturiaÊis a wavetableÊquadrature LFO, based on the ÒEaster eggÓ in theÊMutable Instruments FramesÊmodule.
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• Low-rentsÊis a dualÊLorenz and RšsslerÊ(strange attractor) modulation generator, partially based on the ÒEaster eggÓ in theÊMutable Instruments StreamsÊmodule.
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• PiquedÊis a quad voltage-controlledÊenvelope generator, based on envelope generator code from theÊMutable Instruments PeaksÊmodule, but extending it with voltage control, additional envelope types, including re-triggering (looping) envelopes, additional segment shapes, adjustable trigger delays, and a unique Euclidean Òtrigger filterÓ which turns the app into a Euclidean rhythm generator which can output envelopes, not just gate or trigger pulses.
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• SequinsÊis a dual-channelÊstep sequencerÊoffering 4 ÒtracksÓ of up to 16 steps each; tracks can themselves be sequenced.
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• Dialectic Ping PongÊis a quad bouncing ballÊenvelope generator, based on a hidden mode of theÊMutable Instruments PeaksÊmodule.
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• Viznutcracker, sweet!Êis a quadÊÒbyte beatÓ 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 Òbyte beatÓ control voltage sequences. ÒByte beatsÓ were firstÊdescribedÊin 2011 by viznut (aka Ville-Matias HeikkilŠ).
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• Acid CurdsÊis both a chord quantiser (sometimes called a Òharmonic quantiserÓ for external pitch voltages), and aÊchord progression sequencer.
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• ReferencesÊis an utility app that outputs specificÊreference voltagesÊon each channel to help tune or calibrate VCOs and other modules. It also includes a high-precisionÊfrequency meterÊand note tuner, a high-precision BPM (beats per minute)Êtempo meter, and aÊclosed-loop calibrationÊmode.
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