Vivid.UGens.Analysis

Analysis > Amplitude

ampComp :: Args '["freq", "root"] '["exponent"] a => a -> SDBody a Signal

"Implements the (optimized) formula:

compensationFactor = (root / freq) ** exp

Higher frequencies are normally perceived as louder, which AmpComp compensates."

"Note that for frequencies very much smaller than root the amplitudes can become very high. In this case limit the freq with freq.max(minval), or use AmpCompA."

Computed at AR, KR, or IR

amplitude :: Args '["in"] '["attackSecs", "releaseSecs"] a => a -> SDBody a Signal

"Higher frequencies are normally perceived as louder, which AmpCompA compensates. Following the measurings by Fletcher and Munson, the ANSI standard describes a function for loudness vs. frequency. Note that this curve is only valid for standardized amplitude."

_NOTE_ "Apart from freq, the values are not modulatable"

Analysis > Pitch

pitch :: Args '["in"] '["initFreq", "minFreq", "maxFreq", "execFreq", "maxBinsPerOctave", "median", "ampThreshold", "peakThreshold", "downSample", "clar"] a => a -> SDBody a (Signal, Signal)

"This is a better pitch follower than ZeroCrossing, but more costly of CPU. For most purposes the default settings can be used and only in needs to be supplied."

"[This function] returns two values [...], a freq which is the pitch estimate and hasFreq, which tells whether a pitch was found."

Note -- as this returns a 2-tuple of Signals -- that you may need to be careful not to accidentally use functions from the Foldable instance for (,) with the return value of pitch.

"Some vowels are still problematic, for instance a wide open mouth sound somewhere between a low pitched short a sound as in sat, and long i sound as in fire, contains enough overtone energy to confuse the algorithm."

"None of these settings are time variable."

Can only run at KR

Analysis