Timestretching/Pitchshifting

[Christoph Hart]

@d-healey haha, I'm using a new tool within VisualStudio (Resharper C++) and I think I've pressed a wrong shortcut and it inserted this completely idiotic include statement. I also got the compilation errors but I thought it was a glitch so I removed the file locally...

I can't reproduce the BPM issue - is this Linux only?

And yes the timestretching algorithm can cope with extreme ratios (and it even starts to randomize the phase outside of the 0.5...2.0 range to get a PaulStretch-like sound. I've just added this limitation arbitrarily so I don't have to deal with buffers that get too big...

[d.healey]

@Christoph-Hart Yeah it could be a Linux thing, I haven't tested on other systems.

[audiolyf]

@Christoph-Hart Very cool! Where can we poke around to lower the limit? And is there a way to reach the stretch ratio of the Sampler module via scripting ?

[Christoph Hart]

And is there a way to reach the stretch ratio of the Sampler module via scripting ?

Sure:

Sampler.setTimestretchRatio(newRatio);

[Christoph Hart]

I've updated the docs to include a chapter about how it works:

HISE | Docs

(docs.hise.audio)

[d.healey]

@Lindon Need to update your VI thread :)

[ulrik]

@Christoph-Hart Much appreciated Christoph!

[audiolyf]

@Christoph-Hart Nice! Is getTimestretchOptions() not implemented yet?

[d.healey]

@audiolyf I can see it in the repo - https://github.com/christophhart/HISE/commit/3c8711f0713f445d197fa6b7d8f9e4819de114f6#diff-92b4316aaf5f04995603daa0550fbbb9156f53dbb5061d9608eacb18fb356d73

[Lumi283]

Thank you Christoph Hart for this feature. My project was stuck, but now the problem is solved! Don't you think @d-healey that it would be interesting to offer a tutorial on your YouTube channel to explain how to properly implement time stretching? It could help more than one person.
Thanks,
Remi Dufeu

[audiolyf]

@d-healey Pulled the branch yesterday and everything else is there but I'm getting function not found both with getSampler and getChildSynth

[d.healey]

@audiolyf Maybe you pulled before Christoph added it?

[Lindon]

@d-healey said in Timestretching/Pitchshifting:

@Lindon Need to update your VI thread :)

Done!

[d.healey]

@ABYSS_CO said in Timestretching/Pitchshifting:

Don't you think @d-healey that it would be interesting to offer a tutorial on your YouTube channel to explain how to properly implement time stretching?

Definitely, once it's a little more mature.

[Christoph Hart]

@d-healey there‘s not much to show in a tutorial - just turn on timestretching and set the ratio…

[d.healey]

@Christoph-Hart I think they'll want to know how to use the scripting functions and implement a UI.

[audiolyf]

@Christoph-Hart Sample start mod is not possible, right?

[Christoph Hart]

@audiolyf Actually I just have forgot to take that into account but that's fixed now (along with a lower stretch limit of 0.0625 instead of 0.5).

[audiolyf]

@Christoph-Hart mf king!

[Christoph Hart]

I'm thinking about adding this to the AudioLooper too (it's pretty obvious that this might be useful there). Is anybody using the tempo synced mode in a real project? It previously changed the pitch to match the tempo but I guess that is so totally useless that I can replace the functionality and enable timestretching by default when the tempo syncing is activated.