Rubberband Pitch Scale Adjust the audio pitch using the Rubberband library. Meltytech, LLC Pitch Scale The pitch scaling ratio. This is the ratio of target frequency to source frequency. For example, a ratio of 2.0 would shift up by one octave; 0.5 down by one octave; or 1.0 leave the pitch unaffected. To put this in musical terms, a pitch scaling ratio corresponding to a shift of o octaves (where o is positive for an upwards shift and negative for downwards) is: f = pow(2.0, o). Overrides octaveshift. Stretch Stretch the audio to fill the requested samples. This option will have no effect if the requested sample size is the same as the received sample size. Latency The amount of delay for each sample from the input to the output.