What tempi to use
tempiDisplay lets you visualize the tempi already used in a project (entered manually or tapped in real time), along with divided and multiplied equivalents, and suggests new tempi chosen to be as far as possible from the existing ones.
(requires Processing)
What notes to use
affChroma displays the combined
chroma features of a collection of audio files.
This makes it easier to identify pitch classes that have been underused so far, and to focus future tracks on less represented harmonic areas.
(requires Python)