envelopes.lib
This library contains a collection of envelope generators. Its official prefix is en.
Functions Reference
(en.)smoothEnvelope
An envelope with an exponential attack and release.
smoothEnvelope is a standard Faust function.
Usage
smoothEnvelope(ar,t) : _
- ar: attack and release duration (s)
- t: trigger signal (attack is triggered when- t>0, release is triggered when- t=0)
(en.)ar
AR (Attack, Release) envelope generator (useful to create percussion envelopes).
ar is a standard Faust function.
Usage
ar(at,rt,t) : _
Where:
- at: attack (sec)
- rt: release (sec)
- t: trigger signal (attack is triggered when- t>0, release is triggered when- t=0)
(en.)arfe
ARFE (Attack and Release-to-Final-value Exponentially) envelope generator. Approximately equal to smoothEnvelope(Attack/6.91) when Attack == Release.
Usage
arfe(a,r,f,t) : _
Where:
- a,- r: attack (sec), release (sec)
- f: final value to approach upon release (such as 0)
- t: trigger signal (attack is triggered when- t>0, release is triggered when- t=0)
(en.)are
ARE (Attack, Release) envelope generator with Exponential segments. Approximately equal to smoothEnvelope(Attack/6.91) when Attack == Release.
Usage
are(a,r,g) : _
Where:
- a: attack (sec)
- r: release (sec)
- g: gate signal (attack is triggered when- g>0, release is triggered when- greturns to 0).
(en.)asr
ASR (Attack, Sustain, Release) envelope generator.
asr is a standard Faust function.
Usage
asr(at,sl,rt,t) : _
Where:
- at: attack (sec)
- sl: sustain level (between 0..1)
- r: release (sec)
- t: trigger signal (attack is triggered when- t>0, release is triggered when- t=0)
(en.)adsr
ADSR (Attack, Decay, Sustain, Release) envelope generator.
adsr is a standard Faust function.
Usage
adsr(at,dt,sl,rt,gate) : _
Where:
- at: attack time (sec)
- dt: decay time (sec)
- sl: sustain level (between 0..1)
- rt: release time (sec)
- gate: trigger signal (attack is triggered when- gate>0, release is triggered when- gate=0)
(en.)adsre
ADSRE (Attack, Decay, Sustain, Release) envelope generator with Exponential segments.
Usage
adsre(a,d,s,r,g) : _
Where:
- a: attack (sec)
- d: decay (sec)
- s: sustain (fraction of- t: 0-1)
- r: release (sec)
- g: gate signal: attack is triggered when- ggoes from zero to positive, release is triggered when- greturns to 0
(en.)asre
ASRE (Attack, Sustain, Release) envelope generator with Exponential segments.
Usage
asre(a,s,r,g) : _
Where:
- a: attack (sec)
- s: sustain (fraction of- t: 0-1)
- r: release (sec)
- t: trigger signal (attack is triggered when- t>0, release is triggered when- t=0)
(en.)dx7envelope
DX7 operator envelope generator with 4 independent rates and levels. It is essentially a 4 points BPF.
Usage
dx7_envelope(R1,R2,R3,R4,L1,L2,L3,L4,t) : _
Where:
- RN: rates in seconds
- LN: levels (0-1)
- t: trigger signal