Is there being work on library (variable playback without affecting pitch)

[charnjit]

I was searching library but not found...?? Is there someone working on audio library which allow variable playback Speed (without affecting pitch) & also allow variable pitch (without affecting playback Speed) . With Seamless loop mode/ low latency (for .wav files or raw store on sd card.i am excited to it, when such library will be in Arduino library manager to use ,,,, please share link if already here a library
Thank you

 

[Rezo]

A Phase Vocoder seems to be the best solution for this the keep the artifacts low, but the compute power needed for this is high.

@PaulStoffregen mentioned that he had development of this on his wish list.

It’s one thing to convert a sound track to play at a slower or faster rate while locking the key, but it’s even more challenging to do so in realtime.

Another option you could try is granular synth method, where you take a set of samples and put them into windows, then crossfade more/less windows together as you modify the tempo.

Either way, nothing available yet for the Teensy as far as I know

 

[charnjit]

A Phase Vocoder seems to be the best solution for this the keep the artifacts low, but the compute power needed for this is high.

@PaulStoffregen mentioned that he had development of this on his wish list.

It’s one thing to convert a sound track to play at a slower or faster rate while locking the key, but it’s even more challenging to do so in realtime.

Another option you could try is granular synth method, where you take a set of samples and put them into windows, then crossfade more/less windows together as you modify the tempo.

Either way, nothing available yet for the Teensy as far as I know

As I saw Teensy Play audio with variable playback rate, .. I seemed it also possible from our great developers on this forum in future,,,,,,Thank you...