PureData (en)

Name	Library/Path	Function
Audio Math
Vanilla Objects
+~ -~ *~ /~		operators on audio signals
max~ min~		maximum or minimum of 2 inputs
clip~		restrict a signal to lie between two limits
q8_rsqrt~		signal reciprocal square root
q8_sqrt~		signal square root
wrap~		remainder modulo 1
fft~ ifft~		forward and inverse complex FFT
rfft~ rifft~		forward and inverse real FFT
framp~		estimate frequency and amplitude of FFT components
mtof~ ftom~ rmstodb~ dbtorms~ rmstopow~ powtorms~		conversions for audio signals
pow~ log~ exp~ abs~		math
Extended Objects
# >~, <~, ==~, &&~, \|\|~		logical operators
abs~	cyclone flatspace markex zexy	absolute value of a signal
absgn~	flatspace zexy	absolute value + signum
addl~	iemlib	signal addition with line~
amp~	hcs	smooth amplitude control
atan2~	cyclone flatspace ggee	get the phase from a imaginary value of the fft
avg~	cyclone flatspace zexy	arithmetic mean of 1 signal-vector
Clip~	cyclone	limit numbers to a range
divl~	iemlib	signal divison with line~
exp~ log~		signal math
expr~ fexpr~	vanilla	expression evaluation
ln~	flatspace motex	log~
m2f~	flatspace iemlib	convert MIDI pitch to frequency (obsolete)
mull~	iemlib	signal multiplication with line~
multiline~	flatspace zexy	line~d multiplication of multiple signals
pol2rec~	flatspace motex	inverse of rec2pol~
rec2pol~	flatspace motex	convert rectangular coordinates to polar
round~	iemlib	round signal float to nearest integer
sgn~	flatspace zexy	signum of a signal
sin_phase~	flatspace iemlib	calculate phase difference between 2 sine-waves, in samples
subl~	iemlib	signal subtraction with line~
t3_sig~		convert numbers to signal with sample accuracy
bfft~	creb flatspace	reordered fft
bitsplit~	creb	convert signal to binary vector
blocknorm~	creb	normalize a (set of) dsp block(s) (i.e. for spectral processing)
dwt~	creb flatspace	discrete wavelet transform
idwt~	creb flatspace	discrete inverse wavelet transform
delta~	cxc cyclone flatspace	difference between this and last sample
acos~ asin~atan~	cyclone	arc functions
acosh~	cyclone
asinh~	cyclone
atanh~	cyclone
average~	cyclone
cosh~ sinh~ tanh~	cyclone	hyperbolic functions
cosx~ sinx~ tanx~	cyclone
log~	cyclone
cartopol~ poltocar~	cyclone	cartesian to polar conversion
pow~	cyclone
framescore~ framespect~	ekext flatspace	calculates weighted similarity value for 2 signal vectors
hssc~	ekext flatspace	highest significant spectral component
mandelbrot~	ext13 flatspace	z=z*z+c
bwin~	flatspace	multiplies a signal block with a window
bmax~	flib	gives block max
irreg~	flib	irregularity
melf~	flib	creates a mel spaced filterbank to generate mel frequency cepstral coefficients
mspec~	flib	get amplitude or power spectrum from fft
peak~	flib	get spectral peaks from magnitudes / estimate frequency
pspec~	flib	get phase spectrum from fft
sc~	flib	spectral centroid
scm~	flib	spectral flatness measure
ss~	flib	spectral smoothness
trist~	flib	tristimulus x, y, z

Name

Library/Path

Function

Audio Math