User-Defined Opcode Database

Edited by

Steven Yi

This is a repository of User-Defined Opcodes for the Csound music synthesis software. User-Defined Opcodes are opcodes for Csound created using Csound orchestra text. More information about User-Defined Opcodes can be found here.

Opcodes

Signal Generators

footarray - Interface for a foot array which outputs program change MIDI messages. Can be used with any MIDI program change capable device.

msrOsc - Simple Generator

p5glove - Unit generator for P5 data glove

PartikkelSimpA - A simplified version of the Partikkel opcode, but with some additional parameters

pgmin - Read program change messages from MIDI input.

RandomWalkA - Generate random walk at a-rate

RandomWalkK - Generate random walk at k-rate

rbatonPercPad - Senses trigger/whack strength as well as X and Y coordinates of the two batons in a Max Mathew's Radio Baton system.

rbatonPot - Implements a sensor for the 4 pots, 2 footswitches and B15+ button on the Max Mathew's Radio Baton unit.

rbatonXYZ - polls X, Y, and Z coordinates of a Max Mathew's Radio Baton.

SamplePlay1 - Plays a mono sample from a GEN01 (non-normalized) function table (with poscil3)

SamplePlay2 - Plays a stereo sample from two GEN01 (non-normalized) function tables (with poscil3)

SamplePlay4 - Plays a four channel sample from four GEN01 (non-normalized) function tables (with poscil3)

SamplePlay8 - Plays an eight channel sample from eight GEN01 (non-normalized) function tables (with poscil3)

stereoGrain - Granular synthesis similar to granule but in stereo with control rate parameters and unlimited transpositions.

vowgen - fof-based vocal generator with morfable vowels

Signal Modifiers

Effects

decimator - Sample rate / Bit depth reduce. Based on the work of Steven Cook. k-rate parameters.

ensembleChorus - A stereo chorus opcode with multiple voices.

freqShift - Detunes an audio signal

SCReverb - 8 delay line stereo FDN reverb

SigRec - A table-based signal recorder (looping sampler), with pitch control

SigReverse - A table-based reversing opcode.

Filters

Fofilter - A formant filter version of the FOF opcode.

Moogladder - An improved implementation of the Moog ladder filter

Statevar - A digital version of the analogue state variable filter.

tap_tubewarmth - tap_tubewarmth - A port of Tom Szilagyi's TAP TubeWarmth LADSPA plugin to a Csound User-Defined Opcode

Vocoder - channel vocoder with user-specified number of bands

vowel - vowel filter with morfable vowels

Panning and Spatialization

bformatQuad - Converts quadrophonic to b-format.

bformatStereo - Converts stereo to b-format ambisonics.

pan_delay_and_filtered - Pan using delay and filters

pan_equal_power - Equal Power Panning

pan_gm2 - Equal Power Panning scheme defined by MIDI Association for GM2 in RP-036

pan_simple - Simple Linear Pan

pan_sin - Pan using Sin/Cos to create more even power between channels

pan_sqrt - sqrt method for panning

quadBformat - Converts b-format to quadrophonic.

stereoBformat - Converts b-format ambisonics to uhj stereo.

stereoMS - Converts Stereo to MS and MS to Stereo.

stereoRotate - The proper way to do stereo 'panning'.

declick - removes clicks from signal start and end

Residual - extracts stochastic components (transients etc) from a sound (using csound 5 opcodes)

Utilities

ampdbN - Normalized conversion from db to amplitude.

ampSlider - Converts a scaled (0-1) value to a value resembling a hardware mixer slider.

cpsmid - Converts MIDI Note Number to Cycles per second (Hz)

deflutter - deflutter k-rate input (data smoothing)

ExpCurve - Normalised exponential curve with variable steepness.

FileToPvsBuf - Writes an audio file to a pvs buffer

findPowerOfTwo - Given a value in seconds, finds a power of two size equal to or greater than it in samples

flip - Flips an incoming floating point value at k-rate.

ftreverse - reverses an ftable's contents in place at k-rate

gainslider - Logarithmic gain slider

getFrequency - Returns frequency whether being passed in pch or frequency

hysteresis - Implements classic 2-threshold hysteresis. Useful for performance controllers.

LogCurve - Normalised logarithmic curve with variable steepness.

lowpass - A k-rate smoothing UDO that is useful for averaging performance controller data.

midiMonitor - Displays midi channel and control number information

PfieldsToTable - Transfers score parameter fields to a function table

scale - Scales incoming value to user-definable range. Similar to scale object found in popular dataflow languages.

TableDump - Prints a function table with formatting options.

TableToFile - Writes a function table to a file with formatting options.

TabPermRand_i - permutes the values of a function table randomly

tieStatus - Returns the status of a note in a group of tied notes

Uncategorized

boomerangPointer - Pointer to read a function table forwards then backwards or vice versa.

filterBank - Defines a bank of bandpass filters in parallel whose outputs can be scaled using a function table.

linearPointer - Pointer to read a function table linearly, forwards or backwards.

pvshift - Pitch shifting and spectral stretching with pvs streams

RecursiveDiskin - Alters kpitch and iskiptime each time it calls itself to create a little bit of texture.

sampleSlicer - Reads a function table in incremental slices.

sittinginaroom - A simple,recursive opcode that has pleasant effects. The name pretty much describes what it does.