User talk:149.167.151.4

Pitch shifting vs scaling
The terms "pitch scaling" and "pitch shifting" are often (incorrectly) used interchangeably by writers.

This article is an excellent resource, except for the widespread misuse of the term "pitch scaling" (instead of "pitch shifting" or "frequency scaling").

Pitch is a logarithmic function of frequency, so frequency scaling is equivalent to pitch shifting.

"Pitch scaling" would require an arbitrary assignment of "zero" (i.e. the note that will not be changed by the scaling process), and would produce a very non-musical result, each inter-note interval being compressed or expanded differently, with intervals further from the zero note being more affected. Frequency shifting (which IS practical and has been used) also produces non-musical but nonetheless sometimes useful results; in that case the intervals between lower notes are more affected. In both those cases harmonic relationships are destroyed.

The techniques discussed in the article generally refer to "pitch shifting" or "frequency scaling".

149.167.151.4 (talk) 23:04, 21 December 2020 (UTC)