class PF::Envelope

• PF::Envelope
• Reference
• Object

Overview

Enevelope represents an ADSR cycle to control the amplitude of a sound throughout its lifecycle

Defined in:

audio/envelope.cr

Constructors

• .new(attack : PF::Envelope::Stage, decay : PF::Envelope::Stage, sustain : PF::Envelope::Stage, release : PF::Envelope::Stage)
• .new

Instance Method Summary

• #amplitude(time : Float64, started_at : Float64, released_at : Float64 | Nil = nil)

  Givin an absolute time, along with when the envelope was started_at, and released_at? returns the current aplitude of the enveloped sound

• #attack : Stage
• #attack=(attack : Stage)
• #decay : Stage
• #decay=(decay : Stage)
• #duration

  The length of time this envelope should last for note: might be inifinite if sustain has an infinite duration

• #release : Stage
• #release=(release : Stage)
• #stage(relative_time : Float64)

  Given a relative_time to when the current stage of the envelope was started, returns the current stage (ADSR), along with the relative_time into that stage

• #sustain : Stage
• #sustain=(sustain : Stage)

Constructor Detail

Instance Method Detail