Keyframe Time Stretching Examples

Each example below is presented in three forms: first, the sparsified input played back at unity time and pitch; second, a time-stretched and compressed version; third, a pitch-shifted version (up and down). All recordings were captured under real-time control of the parameters and are meant to show the continuous nature of the algorithm across a wide range of settings.

Borderline

Tame Impala

Base

Borderline Base spectrogram

Stretch

Borderline Stretch spectrogram

Pitch

Borderline Pitch spectrogram

Ex-Factor

Lauryn Hill

Base

Ex-Factor Base spectrogram

Stretch

Ex-Factor Stretch spectrogram

Pitch

Ex-Factor Pitch spectrogram

Lithium

Nirvana

Base

Lithium Base spectrogram

Stretch

Lithium Stretch spectrogram

Pitch

Lithium Pitch spectrogram

Hide and Seek

Imogen Heap

Base

Hide and Seek Base spectrogram

Stretch

Hide and Seek Stretch spectrogram

Pitch

Hide and Seek Pitch spectrogram

Pink + White

Frank Ocean

Base

Pink + White Base spectrogram

Stretch

Pink + White Stretch spectrogram

Pitch

Pink + White Pitch spectrogram

You Know I'm No Good

Amy Winehouse

Base

You Know I'm No Good Base spectrogram

Stretch

You Know I'm No Good Stretch spectrogram

Pitch

You Know I'm No Good Pitch spectrogram