e1lama/stk
1
0
Fork 0
mirror of https://github.com/thestk/stk synced 2026-01-12 12:31:53 +00:00
Code Issues Packages Projects Releases Wiki Activity

Version 4.4.3

Browse Source
This commit is contained in:
Gary Scavone
2013-09-29 23:21:29 +02:00
committed by Stephen Sinclair
parent baca57040b
commit 0aec39260a
223 changed files with 26190 additions and 11130 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
src/TwoZero.cpp
View File

@@ -6,7 +6,7 @@
provided for creating a "notch" in the frequency response while
maintaining a constant filter gain.
by Perry R. Cook and Gary P. Scavone, 1995 - 2010.
by Perry R. Cook and Gary P. Scavone, 1995-2011.
*/
/***************************************************/
@@ -32,7 +32,7 @@ TwoZero :: ~TwoZero()
void TwoZero :: sampleRateChanged( StkFloat newRate, StkFloat oldRate )
{
if ( !ignoreSampleRateChange_ ) {
errorString_ << "TwoZero::sampleRateChanged: you may need to recompute filter coefficients!";
oStream_ << "TwoZero::sampleRateChanged: you may need to recompute filter coefficients!";
handleError( StkError::WARNING );
}
}
@@ -48,8 +48,19 @@ void TwoZero :: setCoefficients( StkFloat b0, StkFloat b1, StkFloat b2, bool cle
void TwoZero :: setNotch( StkFloat frequency, StkFloat radius )
{
#if defined(_STK_DEBUG_)
if ( frequency < 0.0 || frequency > 0.5 * Stk::sampleRate() ) {
oStream_ << "TwoZero::setNotch: frequency argument (" << frequency << ") is out of range!";
handleError( StkError::WARNING ); return;
}
if ( radius < 0.0 ) {
oStream_ << "TwoZero::setNotch: radius argument (" << radius << ") is negative!";
handleError( StkError::WARNING ); return;
}
#endif
b_[2] = radius * radius;
b_[1] = (StkFloat) -2.0 * radius * cos(TWO_PI * (double) frequency / Stk::sampleRate());
b_[1] = -2.0 * radius * cos(TWO_PI * frequency / Stk::sampleRate());
// Normalize the filter gain.
if ( b_[1] > 0.0 ) // Maximum at z = 0.