CsoundExpr.Opcodes.Sigmod.Standard

Standard Filters

Documentation

areson :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : areson
• syntax :

   ares areson asig, kcf, kbw [, iscl] [, iskip]

• description :

A notch filter whose transfer functions are the complements of the reson opcode.

• url : http://www.csounds.com/manual/html/areson.html

lowpass2 :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : lowpass2
• syntax :

   ares lowpass2 asig, kcf, kq [, iskip]

• description :

Implementation of a resonant second-order lowpass filter.

• url : http://www.csounds.com/manual/html/lowpass2.html

lowres :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : lowres
• syntax :

   ares lowres asig, kcutoff, kresonance [, iskip]

• description :

lowres is a resonant lowpass filter.

• url : http://www.csounds.com/manual/html/lowres.html

lowresx :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : lowresx
• syntax :

   ares lowresx asig, kcutoff, kresonance [, inumlayer] [, iskip]

• description :

lowresx is equivalent to more layers of lowres with the same arguments serially connected.

• url : http://www.csounds.com/manual/html/lowresx.html

lpf18 :: (K k0, K k1, K k2) => Arate -> k0 -> k1 -> k2 -> Arate

• opcode : lpf18
• syntax :

   ares lpf18 asig, kfco, kres, kdist

• description :

Implementation of a 3 pole sweepable resonant lowpass filter.

• url : http://www.csounds.com/manual/html/lpf18.html

moogvcf :: (X x0, X x1) => [Irate] -> Arate -> x0 -> x1 -> Arate

• opcode : moogvcf
• syntax :

   ares moogvcf asig, xfco, xres [,iscale, iskip]

• description :

A digital emulation of the Moog diode ladder filter configuration.

• url : http://www.csounds.com/manual/html/moogvcf.html

moogladder :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : moogladder
• syntax :

   asig moogladder ain, kcf, kres[, istor]

• description :

Moogladder is an new digital implementation of the Moog ladder filter based on the work of Antti Huovilainen, described in the paper Non-Linear Digital Implementation of the Moog Ladder Filter (Proceedings of DaFX04, Univ of Napoli). This implementation is probably a more accurate digital representation of the original analogue filter.

• url : http://www.csounds.com/manual/html/moogladder.html

reson :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : reson
• syntax :

   ares reson asig, kcf, kbw [, iscl] [, iskip]

• description :

A second-order resonant filter.

• url : http://www.csounds.com/manual/html/reson.html

resonr :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : resonr
• syntax :

   ares resonr asig, kcf, kbw [, iscl] [, iskip]

• description :

Implementations of a second-order, two-pole two-zero bandpass filter with variable frequency response.

• url : http://www.csounds.com/manual/html/resonr.html

resonx :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : resonx
• syntax :

   ares resonx asig, kcf, kbw [, inumlayer] [, iscl] [, iskip]

• description :

resonx is equivalent to a filters consisting of more layers of reson with the same arguments, serially connected. Using a stack of a larger number of filters allows a sharper cutoff. They are faster than using a larger number instances in a Csound orchestra of the old opcodes, because only one initialization and k- cycle are needed at time and the audio loop falls entirely inside the cache memory of processor.

• url : http://www.csounds.com/manual/html/resonx.html

resony :: (K k0, K k1, K k2) => [Irate] -> Arate -> k0 -> k1 -> Irate -> k2 -> Arate

• opcode : resony
• syntax :

   ares resony asig, kbf, kbw, inum, ksep [, isepmode] [, iscl] [, iskip]

• description :

A bank of second-order bandpass filters, connected in parallel.

• url : http://www.csounds.com/manual/html/resony.html

resonz :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : resonz
• syntax :

   ares resonz asig, kcf, kbw [, iscl] [, iskip]

• description :

Implementations of a second-order, two-pole two-zero bandpass filter with variable frequency response.

• url : http://www.csounds.com/manual/html/resonz.html

rezzy :: (X x0, X x1) => [Irate] -> Arate -> x0 -> x1 -> Arate

• opcode : rezzy
• syntax :

   ares rezzy asig, xfco, xres [, imode, iskip]

• description :

A resonant low-pass filter.

• url : http://www.csounds.com/manual/html/rezzy.html

statevar :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> MultiOut

• opcode : statevar
• syntax :

   ahp,alp,abp,abr statevar ain, kcf, kq [, iosamps, istor]

• description :

Statevar is a new digital implementation of the analogue state-variable filter. This filter has four simultaneous outputs: high-pass, low-pass, band-pass and band-reject. This filter uses oversampling for sharper resonance (default: 3 times oversampling). It includes a resonance limiter that prevents the filter from getting unstable.

• url : http://www.csounds.com/manual/html/statevar.html

svfilter :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> MultiOut

• opcode : svfilter
• syntax :

   alow, ahigh, aband svfilter asig, kcf, kq [, iscl]

• description :

Implementation of a resonant second order filter, with simultaneous lowpass, highpass and bandpass outputs.

• url : http://www.csounds.com/manual/html/svfilter.html

tbvcf :: (X x0, X x1, K k0, K k1) => [Irate] -> Arate -> x0 -> x1 -> k0 -> k1 -> Arate

• opcode : tbvcf
• syntax :

   ares tbvcf asig, xfco, xres, kdist, kasym [, iskip]

• description :

This opcode attempts to model some of the filter characteristics of a Roland TB303 voltage-controlled filter. Euler's method is used to approximate the system, rather than traditional filter methods. Cutoff frequency, Q, and distortion are all coupled. Empirical methods were used to try to unentwine, but frequency is only approximate as a result. Future fixes for some problems with this opcode may break existing orchestras relying on this version of tbvcf.

• url : http://www.csounds.com/manual/html/tbvcf.html

vlowres :: (K k0, K k1, K k2) => Arate -> k0 -> k1 -> Irate -> k2 -> Arate

• opcode : vlowres
• syntax :

   ares vlowres asig, kfco, kres, iord, ksep

• description :

A bank of filters in which the cutoff frequency can be separated under user control

• url : http://www.csounds.com/manual/html/vlowres.html

bqrez :: (X x0, X x1) => [Irate] -> Arate -> x0 -> x1 -> Arate

• opcode : bqrez
• syntax :

   ares bqrez asig, xfco, xres [, imode] [, iskip]

• description :

A second-order multi-mode filter.

• url : http://www.csounds.com/manual/html/bqrez.html

atone :: K k0 => [Irate] -> Arate -> k0 -> Arate

• opcode : atone
• syntax :

   ares atone asig, khp [, iskip]

• description :

A hi-pass filter whose transfer functions are the complements of the tone opcode.

• url : http://www.csounds.com/manual/html/atone.html

atonex :: K k0 => [Irate] -> Arate -> k0 -> Arate

• opcode : atonex
• syntax :

   ares atonex asig, khp [, inumlayer] [, iskip]

• description :

atonex is equivalent to a filter consisting of more layers of atone with the same arguments, serially connected. Using a stack of a larger number of filters allows a sharper cutoff. They are faster than using a larger number instances in a Csound orchestra of the old opcodes, because only one initialization and k- cycle are needed at time and the audio loop falls entirely inside the cache memory of processor.

• url : http://www.csounds.com/manual/html/atonex.html

tone :: K k0 => [Irate] -> Arate -> k0 -> Arate

• opcode : tone
• syntax :

   ares tone asig, khp [, iskip]

• description :

A first-order recursive low-pass filter with variable frequency response.

• url : http://www.csounds.com/manual/html/tone.html

tonex :: K k0 => [Irate] -> Arate -> k0 -> Arate

• opcode : tonex
• syntax :

   ares tonex asig, khp [, inumlayer] [, iskip]

• description :

tonex is equivalent to a filter consisting of more layers of tone with the same arguments, serially connected. Using a stack of a larger number of filters allows a sharper cutoff. They are faster than using a larger number instances in a Csound orchestra of the old opcodes, because only one initialization and k- cycle are needed at time and the audio loop falls entirely inside the cache memory of processor.

• url : http://www.csounds.com/manual/html/tonex.html

biquad :: (K k0, K k1, K k2, K k3, K k4, K k5) => [Irate] -> Arate -> k0 -> k1 -> k2 -> k3 -> k4 -> k5 -> Arate

• opcode : biquad
• syntax :

   ares biquad asig, kb0, kb1, kb2, ka0, ka1, ka2 [, iskip]

• description :

A sweepable general purpose biquadratic digital filter.

• url : http://www.csounds.com/manual/html/biquad.html

biquada :: [Irate] -> Arate -> Arate -> Arate -> Arate -> Arate -> Arate -> Arate -> Arate

• opcode : biquada
• syntax :

   ares biquada asig, ab0, ab1, ab2, aa0, aa1, aa2 [, iskip]

• description :

A sweepable general purpose biquadratic digital filter.

• url : http://www.csounds.com/manual/html/biquada.html

butterbp :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : butterbp
• syntax :

   ares butterbp asig, kfreq, kband [, iskip]

• description :

Implementation of a second-order band-pass Butterworth filter. This opcode can also be written as butbp.

• url : http://www.csounds.com/manual/html/butterbp.html

butterbr :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : butterbr
• syntax :

   ares butterbr asig, kfreq, kband [, iskip]

• description :

Implementation of a second-order band-reject Butterworth filter. This opcode can also be written as butbr.

• url : http://www.csounds.com/manual/html/butterbr.html

butterhp :: K k0 => [Irate] -> Arate -> k0 -> Arate

• opcode : butterhp
• syntax :

   ares butterhp asig, kfreq [, iskip]

• description :

Implementation of second-order high-pass Butterworth filter. This opcode can also be written as buthp.

• url : http://www.csounds.com/manual/html/butterhp.html

butterlp :: K k0 => [Irate] -> Arate -> k0 -> Arate

• opcode : butterlp
• syntax :

   ares butterlp asig, kfreq [, iskip]

• description :

Implementation of a second-order low-pass Butterworth filter. This opcode can also be written as butlp.

• url : http://www.csounds.com/manual/html/butterlp.html

butbp :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : butbp
• syntax :

   ares butbp asig, kfreq, kband [, iskip]

• description :

Same as the butterbp opcode.

• url : http://www.csounds.com/manual/html/butbp.html

butbr :: (K k0, K k1) => [Irate] -> Arate -> k0 -> k1 -> Arate

• opcode : butbr
• syntax :

   ares butbr asig, kfreq, kband [, iskip]

• description :

Same as the butterbr opcode.

• url : http://www.csounds.com/manual/html/butbr.html

buthp :: K k0 => [Irate] -> Arate -> k0 -> Arate

• opcode : buthp
• syntax :

   ares buthp asig, kfreq [, iskip]

• description :

Same as the butterhp opcode.

• url : http://www.csounds.com/manual/html/buthp.html

butlp :: K k0 => [Irate] -> Arate -> k0 -> Arate

• opcode : butlp
• syntax :

   ares butlp asig, kfreq [, iskip]

• description :

Same as the butterlp opcode.

• url : http://www.csounds.com/manual/html/butlp.html

clfilt :: K k0 => [Irate] -> Arate -> k0 -> Irate -> Irate -> Arate

• opcode : clfilt
• syntax :

   ares clfilt asig, kfreq, itype, inpol [, ikind] [, ipbr] [, isba] [, iskip]

• description :

Implements the classical standard analog filter types: low-pass and high-pass. They are implemented with the four classical kinds of filters: Butterworth, Chebyshev Type I, Chebyshev Type II, and Elliptical. The number of poles may be any even number from 2 to 80.

• url : http://www.csounds.com/manual/html/clfilt.html

aresonk :: (K k0, K k1, K k2) => [Irate] -> k0 -> k1 -> k2 -> Krate

• opcode : aresonk
• syntax :

   kres aresonk ksig, kcf, kbw [, iscl] [, iskip]

• description :

A notch filter whose transfer functions are the complements of the reson opcode.

• url : http://www.csounds.com/manual/html/aresonk.html

atonek :: (K k0, K k1) => [Irate] -> k0 -> k1 -> Krate

• opcode : atonek
• syntax :

   kres atonek ksig, khp [, iskip]

• description :

A hi-pass filter whose transfer functions are the complements of the tonek opcode.

• url : http://www.csounds.com/manual/html/atonek.html

lineto :: (K k0, K k1) => k0 -> k1 -> Krate

• opcode : lineto
• syntax :

   kres lineto ksig, ktime

• description :

Generate glissandos starting from a control signal.

• url : http://www.csounds.com/manual/html/lineto.html

port :: K k0 => [Irate] -> k0 -> Irate -> Krate

• opcode : port
• syntax :

   kres port ksig, ihtim [, isig]

• description :

Applies portamento to a step-valued control signal.

• url : http://www.csounds.com/manual/html/port.html

portk :: (K k0, K k1) => [Irate] -> k0 -> k1 -> Krate

• opcode : portk
• syntax :

   kres portk ksig, khtim [, isig]

• description :

Applies portamento to a step-valued control signal.

• url : http://www.csounds.com/manual/html/portk.html

resonk :: (K k0, K k1, K k2) => [Irate] -> k0 -> k1 -> k2 -> Krate

• opcode : resonk
• syntax :

   kres resonk ksig, kcf, kbw [, iscl] [, iskip]

• description :

A second-order resonant filter.

• url : http://www.csounds.com/manual/html/resonk.html

resonxk :: (K k0, K k1, K k2) => [Irate] -> k0 -> k1 -> k2 -> Krate

• opcode : resonxk
• syntax :

   kres resonxk ksig, kcf, kbw[, inumlayer, iscl, istor]

• description :

resonxk is equivalent to a group of resonk filters, with the same arguments, serially connected. Using a stack of a larger number of filters allows a sharper cutoff.

• url : http://www.csounds.com/manual/html/resonxk.html

tlineto :: (K k0, K k1, K k2) => k0 -> k1 -> k2 -> Krate

• opcode : tlineto
• syntax :

   kres tlineto ksig, ktime, ktrig

• description :

Generate glissandos starting from a control signal with a trigger.

• url : http://www.csounds.com/manual/html/tlineto.html

tonek :: (K k0, K k1) => [Irate] -> k0 -> k1 -> Krate

• opcode : tonek
• syntax :

   kres tonek ksig, khp [, iskip]

• description :

A first-order recursive low-pass filter with variable frequency response.

• url : http://www.csounds.com/manual/html/tonek.html