pyFDN.td.GranularPitchShift

class pyFDN.td.GranularPitchShift(channels, max_delay_samps, grain_dur_samps, transpose_cents, active_channels, fade_ratio=0.25, seed=None)

Stateful, controllable granular pitch shifter.

Two grains, triggered half a grain apart, read a shared per-channel circular buffer at a rate set by transpose_cents. Each grain is windowed by a raised-cosine envelope and, on reaching grain_dur_samps, restarts at a new random position inside the buffer – trading the continuous read-head wraparound of PitchShift for grain-boundary clicks disguised by the envelope. Only active_channels are shifted; the rest pass through unchanged.

__init__(channels, max_delay_samps, grain_dur_samps, transpose_cents, active_channels, fade_ratio=0.25, seed=None)

Methods

__init__(channels, max_delay_samps, ...[, ...])
filter(block)	Filter one block and advance internal state.
process(signal, *[, squeeze])	Filter a whole signal in one call, from the current state.
reset()	Clear internal state (no-op for stateless operators).
set_transpose_cents(cents)

Attributes

in_channels
out_channels

filter(block)

Filter one block and advance internal state.

Return type:

ndarray

reset()

Clear internal state (no-op for stateless operators).

Return type:

None

set_transpose_cents(cents)

Return type:

None