From 67e087dcae35fa9f74a6dced588629fcdf075182 Mon Sep 17 00:00:00 2001 From: nanahi <130121847+na-na-hi@users.noreply.github.com> Date: Fri, 16 Aug 2024 23:55:05 -0400 Subject: [PATCH] DOCS/man/options.rst: add a note about the effective limit of --pitch --- DOCS/man/options.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst index 892398501a..acb0bae350 100644 --- a/DOCS/man/options.rst +++ b/DOCS/man/options.rst @@ -242,6 +242,11 @@ Playback Control affect playback speed. Playing with an altered pitch automatically inserts the ``scaletempo2`` audio filter. + Since pitch change is achieved by combining pitch-preserving speed change and + resampling, the range of pitch change is effectively limited by the + ``min-speed`` and ``max-speed`` parameters of ``scaletempo2``: for example, + a ``min-speed`` of 0.25 limits the highest pitch factor to 4 (1/0.25). + In a standard 12-tone scale system, octaves are separated by a factor of 2 whereas semitones are represented by a factor of 2^(1/12). This means pitches can easily be shifted up or down with a simple multiplier.