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STK ADSR envelope class. More...
#include <ADSR.h>
Public Types | |
enum | { ATTACK, DECAY, SUSTAIN, RELEASE, DONE } |
ADSR envelope states. More... | |
Public Member Functions | |
ADSR (void) | |
Default constructor. | |
~ADSR (void) | |
Class destructor. | |
void | keyOn (void) |
Set target = 1, state = ADSR::ATTACK. | |
void | keyOff (void) |
Set target = 0, state = ADSR::RELEASE. | |
void | setAttackRate (StkFloat rate) |
Set the attack rate. | |
void | setDecayRate (StkFloat rate) |
Set the decay rate. | |
void | setSustainLevel (StkFloat level) |
Set the sustain level. | |
void | setReleaseRate (StkFloat rate) |
Set the release rate. | |
void | setAttackTime (StkFloat time) |
Set the attack rate based on a time duration. | |
void | setDecayTime (StkFloat time) |
Set the decay rate based on a time duration. | |
void | setReleaseTime (StkFloat time) |
Set the release rate based on a time duration. | |
void | setAllTimes (StkFloat aTime, StkFloat dTime, StkFloat sLevel, StkFloat rTime) |
Set sustain level and attack, decay, and release time durations. | |
void | setTarget (StkFloat target) |
Set the target value. | |
int | getState (void) const |
Return the current envelope state (ATTACK, DECAY, SUSTAIN, RELEASE, DONE). | |
void | setValue (StkFloat value) |
Set to state = ADSR::SUSTAIN with current and target values of value. | |
StkFloat | lastOut (void) const |
Return the last computed output value. | |
StkFloat | tick (void) |
Compute and return one output sample. | |
StkFrames & | tick (StkFrames &frames, unsigned int channel=0) |
Fill a channel of the StkFrames object with computed outputs. |
STK ADSR envelope class.
This class implements a traditional ADSR (Attack, Decay, Sustain, Release) envelope. It responds to simple keyOn and keyOff messages, keeping track of its state. The state = ADSR::DONE after the envelope value reaches 0.0 in the ADSR::RELEASE state.
by Perry R. Cook and Gary P. Scavone, 1995 - 2010.
anonymous enum |
ADSR envelope states.
Fill a channel of the StkFrames object with computed outputs.
The channel
argument must be less than the number of channels in the StkFrames argument (the first channel is specified by 0). However, range checking is only performed if _STK_DEBUG_ is defined during compilation, in which case an out-of-range value will trigger an StkError exception.
Implements stk::Generator.
The Synthesis ToolKit in C++ (STK) |
©1995-2010 Perry R. Cook and Gary P. Scavone. All Rights Reserved. |