libsyi - Library of Csound UDO code

by Steven Yi

Files

• tdf2.udo - Implementations of Transposed Direct Form II Biquad filter (users are directed to use Csound's rbjeq for better performance)
• waveseq.udo - Wave sequencing oscillator in the spirit of Korg Wavestation
• adsr140.udo - Gated, Retriggerable envelope generator based on Doepfer A-140 module
• ringmod.udo - Implementation of Julian Parker's digital model of a Ring Modulator
• unirect.udo - Generates a unipolar rectangular signal suitable for use as an audio-rate gate signal
• audaciouseq.udo - Implementation of a 10-band EQ filter based on code from Audacious Media Player
• solina.udo - Chorus effect based on chorus module of Solina String Ensemble
• gatesig.udo - reads a-rate trigger signal (e.g., from mpulse) and outputs gate signal that holds for given time in seconds
• seqsig.udo - reads a-rate trigger signal (e.g., from mpulse) and outputs a value from a k-rate array, cycling through the items
• clock_div.udo - reads a-rate trigger signal (e.g., from mpulse) and emits a slower rate trigger determined by the k-rate division value
• pattern_sequencer.udo - 128 pattern sequencer with 8 sequences per pattern, inspired by the Doepfer Schaltwerk; contains additional utility opcodes for creating and manipulating patterns and sequences
• shimmer_reverb.udo - stereo effect with reverb and spectrally processed pitch-shifted feedback

Deprecated

These have been converted to C and added to core Csound. These files are left here if anyone is interested to study the user-defined code versions.

• k35.udo - low-pass and high-pass filters based on Korg 35 module (found in MS-10 and MS-20)
• zdf_svf.udo - Zero Delay State Variable Filter
• zdf.udo - Zero Delay Feedback Filters (zdf_1pole...)