SDTFilters.h File Reference

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Typedefs
typedef struct SDTOnePole	SDTOnePole
	Opaque data structure for a one pole filter object.
typedef struct SDTAllPass	SDTAllPass
	Opaque data structure for an allpass filter object.
typedef struct SDTEnvelope	SDTEnvelope
	Opaque data structure for an envelope tracker object.
typedef struct SDTTwoPoles	SDTTwoPoles
	Opaque data structure for a two poles filter object.
typedef struct SDTAverage	SDTAverage
	Opaque data structure for a moving average filter object.
typedef struct SDTDelay	SDTDelay
	Opaque data structure for a delay line object.
typedef struct SDTComb	SDTComb
	Opaque data structure representing a comb filter object.
typedef struct SDTWaveguide	SDTWaveguide
	Opaque data structure representing a digital waveguide object.

Functions
SDTOnePole *	SDTOnePole_new ()
	Object constructor. More...
void	SDTOnePole_free (SDTOnePole *x)
	Object destructor. More...
void	SDTOnePole_setFeedback (SDTOnePole *x, double f)
	Manually sets the alpha coefficient. More...
void	SDTOnePole_lowpass (SDTOnePole *x, double f)
	Puts the filter in lowpass mode, at the given cutoff frequency. More...
void	SDTOnePole_highpass (SDTOnePole *x, double f)
	Puts the filter in highpass mode, at the given cutoff frequency. More...
double	SDTOnePole_dsp (SDTOnePole *x, double in)
	Signal processing routine. Call this function at sample rate to compute the filtered signal. More...
SDTAllPass *	SDTAllPass_new ()
	Object constructor. More...
void	SDTAllPass_free (SDTAllPass *x)
	Object destructor. More...
void	SDTAllPass_setFeedback (SDTAllPass *x, double f)
	Sets the feedback coefficient. More...
double	SDTAllPass_dsp (SDTAllPass *x, double in)
	Signal processing routine. Call this function at sample rate to compute the filtered signal. More...
SDTEnvelope *	SDTEnvelope_new ()
	Object constructor. More...
void	SDTEnvelope_free (SDTEnvelope *x)
	Object destructor. More...
void	SDTEnvelope_setAttack (SDTEnvelope *x, double a)
	Sets the attack time. More...
void	SDTEnvelope_setRelease (SDTEnvelope *x, double r)
	Sets the release time. More...
double	SDTEnvelope_dsp (SDTEnvelope *x, double in)
	Signal processing routine. Call this function at sample rate to compute the filtered signal. More...
SDTTwoPoles *	SDTTwoPoles_new ()
	Object constructor. More...
void	SDTTwoPoles_free (SDTTwoPoles *x)
	Object destructor. More...
void	SDTTwoPoles_lowpass (SDTTwoPoles *x, double fc)
	Puts the filter in lowpass mode, at the given cutoff frequency. More...
void	SDTTwoPoles_highpass (SDTTwoPoles *x, double fc)
	Puts the filter in highpass mode, at the given cutoff frequency. More...
void	SDTTwoPoles_resonant (SDTTwoPoles *x, double fc, double q)
	Puts the filter in resonant bandpass mode, at the given center frequency and Q. More...
double	SDTTwoPoles_dsp (SDTTwoPoles *x, double in)
	Signal processing routine. Call this function at sample rate to compute the filtered signal. More...
SDTAverage *	SDTAverage_new (long size)
	Object constructor. More...
void	SDTAverage_free (SDTAverage *x)
	Object destructor. More...
void	SDTAverage_setWindow (SDTAverage *x, unsigned int i)
	Sets the averaging window. More...
double	SDTAverage_dsp (SDTAverage *x, double in)
	Signal processing routine. Call this function at sample rate to compute the filtered signal. More...
SDTDelay *	SDTDelay_new (long maxDelay)
	Object constructor. More...
void	SDTDelay_free (SDTDelay *x)
	Object destructor. More...
void	SDTDelay_clear (SDTDelay *x)
	Clears the buffer, therefore silencing the delayed signal.
void	SDTDelay_setDelay (SDTDelay *x, double f)
	Sets the delay time. Fractional values are allowed. The delay time can be continuously changed over time without audible glitches. More...
double	SDTDelay_dsp (SDTDelay *x, double in)
	Signal processing routine. Call this function at sample rate to output the delayed signal. More...
SDTComb *	SDTComb_new (long maxXDelay, long maxYDelay)
	Object constructor. More...
void	SDTComb_free (SDTComb *x)
	Object destructor. More...
void	SDTComb_setXDelay (SDTComb *x, double f)
	Sets the delay time for the feed forward section. More...
void	SDTComb_setYDelay (SDTComb *x, double f)
	Sets the delay time for the feedback section. More...
void	SDTComb_setXYDelay (SDTComb *x, double f)
	Sets the delay time for both sections. More...
void	SDTComb_setXGain (SDTComb *x, double f)
	Sets the gain for the feed forward section. More...
void	SDTComb_setYGain (SDTComb *x, double f)
	Sets the gain for the feedback section. More...
void	SDTComb_setXYGain (SDTComb *x, double f)
	Sets the gain for both sections. More...
double	SDTComb_dsp (SDTComb *x, double in)
	Signal processing routine. Call this function at sample rate to output the filtered signal. More...
SDTWaveguide *	SDTWaveguide_new (int maxDelay)
	Object constructor. More...
void	SDTWaveguide_free (SDTWaveguide *x)
	Object destructor. More...
double	SDTWaveguide_getFwdOut (SDTWaveguide *x)
	Reads the output signal coming from the right side of the waveguide. More...
double	SDTWaveguide_getRevOut (SDTWaveguide *x)
	Reads the output signal coming from the left side of the waveguide. More...
void	SDTWaveguide_setDelay (SDTWaveguide *x, double f)
	Sets the length of the waveguide, in samples. More...
void	SDTWaveguide_setFwdFeedback (SDTWaveguide *x, double f)
	Sets the feedback on the right side. Determines how much energy gets fed back into the system after the wave reaches the right side of the waveguide. Consequently, this value also determines how much attenuated is the output on the same side. More...
void	SDTWaveguide_setRevFeedback (SDTWaveguide *x, double f)
	Sets the feedback on the left side. Determines how much energy gets fed back into the system after the wave reaches the left side of the waveguide. Consequently, this value also determines how much attenuated is the output on the same side. More...
void	SDTWaveguide_setFwdDamping (SDTWaveguide *x, double f)
	Sets the frequency damping on the right side. More...
void	SDTWaveguide_setRevDamping (SDTWaveguide *x, double f)
	Sets the frequency damping on the left side. More...
void	SDTWaveguide_dsp (SDTWaveguide *x, double fwdIn, double revIn)
	Signal processing routine. Call this function at sample rate to compute the output samples. To read them, call the respective functions SDTWaveguide_getFwdOut() and SDTWaveguide_getRevOut(). More...