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CCRMA's NRev reverberator class. More...
#include <NRev.h>
Public Member Functions | |
NRev (StkFloat T60=1.0) | |
Class constructor taking a T60 decay time argument (one second default value). | |
void | clear (void) |
Reset and clear all internal state. | |
void | setT60 (StkFloat T60) |
Set the reverberation T60 decay time. | |
StkFloat | lastOut (unsigned int channel=0) |
Return the specified channel value of the last computed stereo frame. | |
StkFloat | tick (StkFloat input, unsigned int channel=0) |
Input one sample to the effect and return the specified channel value of the computed stereo frame. | |
StkFrames & | tick (StkFrames &frames, unsigned int channel=0) |
Take a channel of the StkFrames object as inputs to the effect and replace with stereo outputs. | |
StkFrames & | tick (StkFrames &iFrames, StkFrames &oFrames, unsigned int iChannel=0, unsigned int oChannel=0) |
Take a channel of the iFrames object as inputs to the effect and write stereo outputs to the oFrames object. |
CCRMA's NRev reverberator class.
This class takes a monophonic input signal and produces a stereo output signal. It is derived from the CLM NRev function, which is based on the use of networks of simple allpass and comb delay filters. This particular arrangement consists of 6 comb filters in parallel, followed by 3 allpass filters, a lowpass filter, and another allpass in series, followed by two allpass filters in parallel with corresponding right and left outputs.
by Perry R. Cook and Gary P. Scavone, 1995-2011.
StkFloat stk::NRev::lastOut | ( | unsigned int | channel = 0 |
) | [inline] |
Return the specified channel value of the last computed stereo frame.
Use the lastFrame() function to get both values of the last computed stereo frame. The channel
argument must be 0 or 1 (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.
00093 { 00094 #if defined(_STK_DEBUG_) 00095 if ( channel > 1 ) { 00096 oStream_ << "NRev::lastOut(): channel argument must be less than 2!"; 00097 handleError( StkError::FUNCTION_ARGUMENT ); 00098 } 00099 #endif 00100 00101 return lastFrame_[channel]; 00102 }
StkFloat stk::NRev::tick | ( | StkFloat | input, | |
unsigned int | channel = 0 | |||
) | [inline] |
Input one sample to the effect and return the specified channel
value of the computed stereo frame.
Use the lastFrame() function to get both values of the computed stereo output frame. The channel
argument must be 0 or 1 (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.
00105 { 00106 #if defined(_STK_DEBUG_) 00107 if ( channel > 1 ) { 00108 oStream_ << "NRev::tick(): channel argument must be less than 2!"; 00109 handleError( StkError::FUNCTION_ARGUMENT ); 00110 } 00111 #endif 00112 00113 StkFloat temp, temp0, temp1, temp2, temp3; 00114 int i; 00115 00116 temp0 = 0.0; 00117 for ( i=0; i<6; i++ ) { 00118 temp = input + (combCoefficient_[i] * combDelays_[i].lastOut()); 00119 temp0 += combDelays_[i].tick(temp); 00120 } 00121 00122 for ( i=0; i<3; i++ ) { 00123 temp = allpassDelays_[i].lastOut(); 00124 temp1 = allpassCoefficient_ * temp; 00125 temp1 += temp0; 00126 allpassDelays_[i].tick(temp1); 00127 temp0 = -(allpassCoefficient_ * temp1) + temp; 00128 } 00129 00130 // One-pole lowpass filter. 00131 lowpassState_ = 0.7 * lowpassState_ + 0.3 * temp0; 00132 temp = allpassDelays_[3].lastOut(); 00133 temp1 = allpassCoefficient_ * temp; 00134 temp1 += lowpassState_; 00135 allpassDelays_[3].tick( temp1 ); 00136 temp1 = -( allpassCoefficient_ * temp1 ) + temp; 00137 00138 temp = allpassDelays_[4].lastOut(); 00139 temp2 = allpassCoefficient_ * temp; 00140 temp2 += temp1; 00141 allpassDelays_[4].tick( temp2 ); 00142 lastFrame_[0] = effectMix_*( -( allpassCoefficient_ * temp2 ) + temp ); 00143 00144 temp = allpassDelays_[5].lastOut(); 00145 temp3 = allpassCoefficient_ * temp; 00146 temp3 += temp1; 00147 allpassDelays_[5].tick( temp3 ); 00148 lastFrame_[1] = effectMix_*( - ( allpassCoefficient_ * temp3 ) + temp ); 00149 00150 temp = ( 1.0 - effectMix_ ) * input; 00151 lastFrame_[0] += temp; 00152 lastFrame_[1] += temp; 00153 00154 return lastFrame_[channel]; 00155 }
Take a channel of the StkFrames object as inputs to the effect and replace with stereo outputs.
The StkFrames argument reference is returned. The stereo outputs are written to the StkFrames argument starting at the specified channel
. Therefore, the channel
argument must be less than ( channels() - 1 ) of 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.
StkFrames& stk::NRev::tick | ( | StkFrames & | iFrames, | |
StkFrames & | oFrames, | |||
unsigned int | iChannel = 0 , |
|||
unsigned int | oChannel = 0 | |||
) |
Take a channel of the iFrames
object as inputs to the effect and write stereo outputs to the oFrames
object.
The iFrames
object reference is returned. The iChannel
argument must be less than the number of channels in the iFrames
argument (the first channel is specified by 0). The oChannel
argument must be less than ( channels() - 1 ) of the oFrames
argument. 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.
The Synthesis ToolKit in C++ (STK) |
©1995-2011 Perry R. Cook and Gary P. Scavone. All Rights Reserved. |