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.