tur/envelope

stdlib/envelope.tur

defstruct

ADSRParams

(defstruct ADSRParams [attack :int decay :int sustain :int release :int])

parameters for an ADSR envelope.

defn

(adsr-fixed [params gate-duration])

piecewise-linear ADSR computed analytically for a single note.

Parameters

params		ADSRParams controlling shape
gate-duration		how long the gate stays on in seconds (float64)

Example

A Signal Function: sig -> (fn [t] envelope-value).

  ((adsr-fixed (ADSRParams 0.01 0.1 0.7 0.3) 0.5) (constant ()))

Internal definitions

__adsr_attack-- extract attack field from ADSRParams struct pointer.

__adsr_decay-- extract decay field from ADSRParams struct pointer.

__adsr_sustain-- extract sustain field from ADSRParams struct pointer.

__adsr_release-- extract release field from ADSRParams struct pointer.

__adsr_fixed_sample-- compute ADSR envelope value at time t.