BPM to note-length delay times — triplet & dotted included — plus tempo-synced reverb sizes: pre-delay and decay from tight rooms to huge FX verbs.

Streaming loudness targets and true-peak ceilings — where your master should sit for Spotify, Apple, YouTube, Tidal and more.

Tap the spacebar. We average the last 8 hits and round to a sensible BPM.

Pick a root and scale to see its notes, the relative major/minor and neighbouring keys for harmonic mixing — with Camelot codes.

Build a chord from any root — triads to altered dominants — and see every tone spelled with its degree and tensions up to ♭9 / ♯11 / ♭13.

A4 = 440 Hz table, plus alternates: 432, 442, 444. MIDI numbers and wavelengths.

What each band of the spectrum feels like — sub to air — what lives there, and when to boost or cut.