[Hydrogen-devel] Swing factor and advances in the humanizer

[Philipp M. <the...@go...>]

Hey everyone,


Could someone explain to me the meaning behind the so-called *swing* 
factor in the humanizer?

In line 1281 of ///src/core/src/hydrogen.cpp/ it is implemented as a 
*constant shift* forward (backward? haven't had time to delve into the 
audio engine that much yet) in time.

I would like to implement some additional sources of noise in the 
humanizer. I don't really see how the little errors we human make a 
completely independent and could we described by Gaussian white noise.

Instead I want to introduce

- Pink noise, since analysis of fluctuations in music claim this to be 
the most likely type of noise since the 80s 
http://mlab.uiah.fi/~eye/mediaculture/noise.html

- State dependent noise. The variance of the generated noise should in 
my opinion (but I'm not a drummer myself, please correct me if I'm wrong 
:)) dependent of the velocity of the hit. Or to put it simple: the 
stronger you hit the drums, the bigger the fluctuations of the amplitudes.

- Long-range correlated noise. There have been some new findings by 
indicating that long-range correlated noise is indeed the best to 
describe the fluctuations in  rhythms. 
https://www.researchgate.net/profile/Holger_Hennig3/publication/257020003_Musical_rhythms_The_science_of_being_slightly_off/links/56b3a0f408ae1f8aa45350dc/Musical-rhythms-The-science-of-being-slightly-off.pdf 
I wrote some mails to the main author Holger Hennig since there is a 
patent on the algorithm. But for a free and open source project like 
Hydrogen there is nothing to worry and he is happy if we spread the word 
of correlations.

But before building on top of the current humanizer I would like to 
understand all its components.

Cheers,

Phil