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Jezar at Dreampoint's FreeVerb, implemented in STK. More...
#include <FreeVerb.h>
Public Member Functions | |
FreeVerb () | |
FreeVerb Constructor. | |
~FreeVerb () | |
Destructor. | |
void | setEffectMix (StkFloat mix) |
Set the effect mix [0 = mostly dry, 1 = mostly wet]. | |
void | setRoomSize (StkFloat value) |
Set the room size (comb filter feedback gain) parameter [0,1]. | |
StkFloat | getRoomSize (void) |
Get the room size (comb filter feedback gain) parameter. | |
void | setDamping (StkFloat value) |
Set the damping parameter [0=low damping, 1=higher damping]. | |
StkFloat | getDamping (void) |
Get the damping parameter. | |
void | setWidth (StkFloat value) |
Set the width (left-right mixing) parameter [0,1]. | |
StkFloat | getWidth (void) |
Get the width (left-right mixing) parameter. | |
void | setMode (bool isFrozen) |
Set the mode [frozen = 1, unfrozen = 0]. | |
StkFloat | getMode (void) |
Get the current freeze mode [frozen = 1, unfrozen = 0]. | |
void | clear (void) |
Clears delay lines, etc. | |
StkFloat | lastOut (unsigned int channel=0) |
Return the specified channel value of the last computed stereo frame. | |
StkFloat | tick (StkFloat inputL, StkFloat inputR=0.0, unsigned int channel=0) |
Input one or two samples to the effect and return the specified channel value of the computed stereo frame. | |
StkFrames & | tick (StkFrames &frames, unsigned int channel=0) |
Take two channels 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 one or two channels of the iFrames object as inputs to the effect and write stereo outputs to the oFrames object. | |
Protected Member Functions | |
void | update (void) |
Update interdependent parameters. |
Jezar at Dreampoint's FreeVerb, implemented in STK.
Freeverb is a free and open-source Schroeder reverberator originally implemented in C++. The parameters of the reverberation model are exceptionally well tuned. FreeVerb uses 8 lowpass-feedback-comb-filters in parallel, followed by 4 Schroeder allpass filters in series. The input signal can be either mono or stereo, and the output signal is stereo. The delay lengths are optimized for a sample rate of 44100 Hz.
Ported to STK by Gregory Burlet, 2012.
stk::FreeVerb::FreeVerb | ( | ) |
StkFloat stk::FreeVerb::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.
00166 { 00167 #if defined(_STK_DEBUG_) 00168 if ( channel > 1 ) { 00169 oStream_ << "FreeVerb::lastOut(): channel argument must be less than 2!"; 00170 handleError( StkError::FUNCTION_ARGUMENT ); 00171 } 00172 #endif 00173 00174 return lastFrame_[channel]; 00175 }
StkFloat stk::FreeVerb::tick | ( | StkFloat | inputL, | |
StkFloat | inputR = 0.0 , |
|||
unsigned int | channel = 0 | |||
) | [inline] |
Input one or two samples 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.
00178 { 00179 #if defined(_STK_DEBUG_) 00180 if ( channel > 1 ) { 00181 oStream_ << "FreeVerb::tick(): channel argument must be less than 2!"; 00182 handleError(StkError::FUNCTION_ARGUMENT); 00183 } 00184 #endif 00185 00186 if ( !inputR ) { 00187 inputR = inputL; 00188 } 00189 00190 StkFloat fInput = (inputL + inputR) * gain_; 00191 StkFloat outL = 0.0; 00192 StkFloat outR = 0.0; 00193 00194 // Parallel LBCF filters 00195 for ( int i = 0; i < nCombs; i++ ) { 00196 // Left channel 00197 //StkFloat yn = fInput + (roomSize_ * FreeVerb::undenormalize(combLPL_[i].tick(FreeVerb::undenormalize(combDelayL_[i].nextOut())))); 00198 StkFloat yn = fInput + (roomSize_ * combLPL_[i].tick( combDelayL_[i].nextOut() ) ); 00199 combDelayL_[i].tick(yn); 00200 outL += yn; 00201 00202 // Right channel 00203 //yn = fInput + (roomSize_ * FreeVerb::undenormalize(combLPR_[i].tick(FreeVerb::undenormalize(combDelayR_[i].nextOut())))); 00204 yn = fInput + (roomSize_ * combLPR_[i].tick( combDelayR_[i].nextOut() ) ); 00205 combDelayR_[i].tick(yn); 00206 outR += yn; 00207 } 00208 00209 // Series allpass filters 00210 for ( int i = 0; i < nAllpasses; i++ ) { 00211 // Left channel 00212 //StkFloat vn_m = FreeVerb::undenormalize(allPassDelayL_[i].nextOut()); 00213 StkFloat vn_m = allPassDelayL_[i].nextOut(); 00214 StkFloat vn = outL + (g_ * vn_m); 00215 allPassDelayL_[i].tick(vn); 00216 00217 // calculate output 00218 outL = -vn + (1.0 + g_)*vn_m; 00219 00220 // Right channel 00221 //vn_m = FreeVerb::undenormalize(allPassDelayR_[i].nextOut()); 00222 vn_m = allPassDelayR_[i].nextOut(); 00223 vn = outR + (g_ * vn_m); 00224 allPassDelayR_[i].tick(vn); 00225 00226 // calculate output 00227 outR = -vn + (1.0 + g_)*vn_m; 00228 } 00229 00230 // Mix output 00231 lastFrame_[0] = outL*wet1_ + outR*wet2_ + inputL*dry_; 00232 lastFrame_[1] = outR*wet1_ + outL*wet2_ + inputR*dry_; 00233 00234 /* 00235 // Hard limiter ... there's not much else we can do at this point 00236 if ( lastFrame_[0] >= 1.0 ) { 00237 lastFrame_[0] = 0.9999; 00238 } 00239 if ( lastFrame_[0] <= -1.0 ) { 00240 lastFrame_[0] = -0.9999; 00241 } 00242 if ( lastFrame_[1] >= 1.0 ) { 00243 lastFrame_[1] = 0.9999; 00244 } 00245 if ( lastFrame_[1] <= -1.0 ) { 00246 lastFrame_[1] = -0.9999; 00247 } 00248 */ 00249 00250 return lastFrame_[channel]; 00251 }
Take two channels of the StkFrames object as inputs to the effect and replace with stereo outputs.
The StkFrames argument reference is returned. The stereo inputs are taken from (and written back 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::FreeVerb::tick | ( | StkFrames & | iFrames, | |
StkFrames & | oFrames, | |||
unsigned int | iChannel = 0 , |
|||
unsigned int | oChannel = 0 | |||
) |
Take one or two channels 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). If more than one channel of data exists in iFrames
starting from iChannel
, stereo data is input to the effect. 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.
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