Music & Audio

31 free music & audio tools in the Calculators & Converters collection — every one runs in your browser with no signup and no uploads.

BPM to Delay Time (ms) Calculator

Find the perfect delay time in milliseconds for any BPM and note value

BPM to Reverb Pre-Delay Calculator

Sync reverb pre-delay to tempo for rhythmically coherent wet sounds

Capo Chord Transposer

Find real chord names when using a capo at any fret position.

Chord Interval Finder

Identify the intervals and inversions present in any chord voicing

Compressor Attack & Release to BPM Calculator

Set musically synced compressor attack and release times from BPM

Guitar Fret Spacing Calculator

Calculate fret positions for any scale length using the rule of 18

Metronome Math Calculator

Turn BPM and a bar count into exact beat, bar and total durations.

Sample Chop BPM Grid Calculator

Find where to cut a sample loop to keep it in time at any BPM

Scale & Chord Builder

Generate the note list for any scale or chord in any root key.

Semitone & Cents Interval Calculator

Calculate frequency ratios, semitones, and cents between two pitches

Song Key Transposer

Transpose chord charts and key signatures up or down any number of semitones

Speaker Impedance Calculator

Work out the total load for any series or parallel speaker wiring.

Guitar String Tension Calculator

Calculate string tension for any gauge, scale length, and tuning.

Ported Subwoofer Box Volume & Port Calculator

Design a ported/bass-reflex subwoofer enclosure with a tuned port

Tap Tempo BPM Calculator

Tap a button to measure BPM and get delay times instantly

Tempo-to-Note-Grid Reference Table

Full table of note subdivision durations in ms for any BPM

Time Signature Note Value Converter

Find the exact duration of every note value at any tempo and meter.

BPM to Milliseconds Calculator

Turn any tempo into delay and note-length times in milliseconds.

Note Frequency Calculator

Find the exact frequency in Hz for any musical note and octave.

Speaker Impedance Calculator

Calculate total impedance for series, parallel and mixed speaker wiring in seconds.

BPM to Milliseconds Calculator

Convert any tempo to exact delay, echo and reverb times — straight, dotted and triplet.

Capo Transpose Calculator

Find the right capo fret and open chord shape for any key — instantly.

Cents to Frequency Calculator

Convert pitch intervals in cents to exact frequencies — and back.

Chord Finder

Build any chord by root and type, or identify a chord from its notes — with audio playback.

Guitar String Tension Calculator

Find the exact tension on every string — or the right gauge for a target feel.

Key Transpose Calculator

Transpose any song to a new key instantly — diatonic chords, scale notes and full chord charts.

Semitone Interval Calculator

Pick any two notes and instantly see the semitone distance, cents, frequency ratio and interval name.

Time Signature Calculator

Beat durations, bar lengths, compound vs simple meters, polyrhythm grids and tap tempo — all in one tool.

BPM Delay Calculator

Convert BPM to delay times, reverse-engineer tempo from a known delay, tap-detect tempo and model feedback decay — all in one tool.

Metronome & BPM Tapper

Tap the beat, measure your tempo, and hear a precise click-track with note-delay tables.

Scale Degree Calculator

Instantly see every note, Roman numeral and interval in any musical scale.