CMT Documentation

# CMT Library Plugins

The following plugins are provided in the CMT library:

Plugin ID | Plugin Label | Description
--- | --- | ---
1051 | lpf | Low Pass Filter (One Pole).
1052 | hpf | High Pass Filter (One Pole).
1053 | delay_0.01s | Echo Delay Line. The delay time may be varied up to 0.01 seconds. No feedback is provided.
1054 | delay_0.1s | Echo Delay Line. The delay time may be varied up to 0.1 seconds. No feedback is provided.
1055 | delay_1s | Echo Delay Line. The delay time may be varied up to 1 second. No feedback is provided.
1056 | delay_5s | Echo Delay Line. The delay time may be varied up to 5 seconds. No feedback is provided.
1057 | delay_60s | Echo Delay Line. The delay time may be varied up to 60 seconds. No feedback is provided.
1058 | fbdelay_0.01s | Feedback Delay Line. The delay time may be varied up to 0.01 seconds.
1059 | fbdelay_0.1s | Feedback Delay Line. The delay time may be varied up to 0.1 seconds.
1060 | fbdelay_1s | Feedback Delay Line. The delay time may be varied up to 1 second.
1061 | fbdelay_5s | Feedback Delay Line. The delay time may be varied up to 5 seconds.
1062 | fbdelay_60s | Feedback Delay Line. The delay time may be varied up to 60 seconds.
1063 | sine_faaa | Sine Oscillator. Frequency input is audio, Amplitude input is audio.
1064 | sine_faac | Sine Oscillator. Frequency input is audio, Amplitude input is control.
1065 | sine_fcaa | Sine Oscillator. Frequency input is control, Amplitude input is audio.
1066 | sine_fcac | Sine Oscillator. Frequency input is control, Amplitude input is control.
1067 | amp_mono | Amplifier (Mono).
1068 | amp_stereo | Amplifier (Stereo).
1069 | noise_source_white | Noise Source (White).
1070 | am | Amplitude Modulator.
1071 | mixer | Mixer (Stereo to Mono).
1072 | compress_peak | Simple Compressor (Peak Envelope Tracking).
1073 | compress_rms | Simple Compressor (RMS Envelope Tracking).
1074 | expand_peak | Simple Expander (Peak Envelope Tracking).
1075 | expand_rms | Simple Expander (RMS Envelope Tracking).
1076 | limit_peak | Simple Limiter (Peak Envelope Tracking).
1077 | limit_rms | Simple Limiter (RMS Envelope Tracking).
1078 | track_peak | Envelope Tracker (Peak).
1079 | track_rms | Envelope Tracker (RMS).
1080 | track_max_peak | Envelope Tracker (Maximum Peak).
1081 | track_max_rms | Envelope Tracker (Maximum RMS).
1082 | peak | Peak Monitor.
1083 | null_ci | Null Plugin (Control Input).
1084 | null_ai | Null Plugin (Audio Input).
1085 | null_co | Null Plugin (Control Output).
1086 | null_ao | Null Plugin (Audio Output).
1087 | encode_bformat | B-Format Encoder. This plugin encodes ambisonic B-Format audio using the inverse square law but no filtering, reverb or delay.
1088 | encode_fmh | FMH-Format Encoder. This plugin encodes ambisonic FMH-Format audio using the inverse square law but no filtering, reverb or delay.
1089 | fmh2bf | FMH-Format to B-Format. This plugin simply discards the R, S, T, U and V channels but is included for clarity.
1090 | bf2stereo | B-Format to Stereo Ambisonic Decoder. This plugin only actually uses its W and Y input signals and does not use UHJ.
1091 | bf2quad | B-Format to Quad Ambisonic Decoder. This plugin only actually uses its W, Y and Z input signals.
1092 | bf2cube | B-Format to Cube Ambisonic Decoder.
1093 | bf2oct | FMH-Format to Octagon Ambisonic Decoder. This plugin only actually uses its W, X, Y, U and V inputs.
1094 | bf_rotate_z | B-Format Rotation (Horizontal). This plugin rotates an B-Format encoded soundfield around the Z-axis.
1095 | fmh_rotate_z | FMH-Format Rotation (Horizontal). This plugin rotates an FMH-Format encoded soundfield around the Z-axis.
1096 | grain_scatter | Granular Scattering Processor. This plugin generates an output audio stream by scattering short `grains' of sound from an input stream. It is possible to control the length and envelope of these grains, how far away from their source time grains may be scattered and the density (grains/sec) of the texture produced.
1097 | wsshape_sine | Wave Shaper (Sine-Based).
1098 | identity_audio | Identity (Audio).
1099 | identity_control | Identity (Control).
1123 | freeverb3 | Freeverb (Version 3). This reverb unit is a direct port of the free public domain source code available from Jezar at Dreampoint.
1221 | analogue | Analogue Synthesizer Voice. Contains two audio oscillators, one LFO, and three ADSRs. There are five waveforms available for the DCOs: Sine, Triangle, Square, Sawtooth, and Fullwave rectified sine. The DCOs may be frequency modulated and/or pulse width modulated by the LFO.
1222 | organ | Organ Voice with Configurable Harmonics. The user may control the loudness of the harmonics. There are three additional tones that may be enabled and combined: brass, flute, and reed. Two ADSRs control the envelope for the upper and lower harmonics.
1223 | syndrum | Drum Synthesizer.
1224 | vcf303 | VCF 303. A TB-303 resonant filter clone.
1225 | canyon_delay | Canyon Delay. A deep stereo crossdelay with built-in low pass filters.
1226 | phasemod | Phase Modulated Synthesizer Voice. Contains six audio oscillators, each oscillator phase modulates the next. If a modulation coefficient is zero, then the former oscillator's output is summed with the module's output. DCO1's phase modulation parameter specifies an offset not a coefficient. Example modulation parameters {1.0, 0.5, 0.0, 0.5, 0.2, 0.0} for all six oscillators results in the output function: DCO2 (phase = DCO1 (phase = 1.0) * 0.5) + DCO5 (phase = DCO4 (phase = DCO3 (phase = 0.0) * 0.5) * 0.2) + DCO6 (phase = 0.0). Each oscillator's output is bounded by -1.0 and 1.0, or -360o and 360o.
1227 | lofi | Lo Fi. Simulates old audio equipment. Adds distortion, bandwidth limiting, compression, and crackling to audio.
1841 | pink_interpolated_audio | Interpolated pink noise. Pink noise is a kind of random one-dimensional fractal. This plugin approximates the effect of an extreme low pass filter on a pink noise signal. It is useful as a natural-sounding continuously varying control signal with long-term trends as well as short-term variation. If you use it to control the pitch of a sine wave it can sound a bit like wind blowing. Notice that the average value tends to gradually drift over long periods of time. This is in the nature of pink noise, and so can't be helped.
1843 | pink_sh | Sample and hold pink noise. Similar to pink, but with stepped instead of interpolated output.
1844 | pink_full_frequency | Pink noise simulation with a full frequency range. You can low pass filter this to get a similar effect to the interpolated pink noise generator.
1845 | hard_gate | Hard noise gate. If the absolute value of the signal falls below "threshold", it is set to zero. There is no antialiasing.
1846 | disintegrator | Amplifies random half-cycles of it's input by multiplier. Set multiplier to 0 and vary probability for a weird fade effect, or set multiplier to -1 and probability to 0.5 to turn pitched sounds into noise.
1848 | sledgehammer | A Dynamic Sledgehammer, which you can use to bash your signals into shape. It's basically a very simple and heavy compressor with a sidechain. Try it with a pad sound as the carrier and a drum loop as the modulator. Also, you can get some nice "Satan Maximiser"-style distortion by not connecting the modulator (set it's influence to 0) and putting the rate up to around 0.1.
1849 | logistic | Logistic Map chaotic stepped control generator. The logistic map is a classic example from chaos theory. It can be summarised by the formula
    x := r*x*(1-x).
With r<3, x just converges to a constant value. With r just greater than 3 it oscillates with period 2. at about 3.45 the period doubles again to 4. These period doublings occur at smaller and smaller increments of r, until at about 3.5699 there have been an infinite number and the signal never repeates. Between this value and 4 the system exhibits chaotic behaviour (although there are regions of periodicity). Papers are still being published today on the subject of this system's behaviour. This plugin iterates this map at a given frequency to produce a stepped signal, which is scaled to lie in the range (-1,1). When this signal is used as a frequency control it can sometimes sound quite musical.

"Ambisonics" is a registered trademark of Nimbus Communications International.

# CMT Index

- Overview
- Download
- Installation
- License (LGPL)
- Plugins in the Library
- Adding Plugins to the Library
- Change History
- Bugs

## Other Links

- The LADSPA Software Development Kit