Audio & Music
7 toolsConvert between MP3, WAV, FLAC, AAC and Opus in your browser, and convert notes, frequencies, MIDI numbers, tempos, keys, decibels, pitch ratios and bitrates.
Audio files2
Music math5
- Note ↔ frequencyAny note, frequency or MIDI number to the other two — with cents, tuning and a piano table
- BPM ↔ msDelay and LFO times for every note value, tap tempo, bars ↔ seconds and tempo-change math
- Transpose chordsMove a chord sheet to any key, pick sharps or flats, add a capo, and see the scale and diatonic chords
- DecibelsdB to amplitude and power ratios, dBu/dBV/volts, bit-depth dynamic range and SPL over distance
- Semitones ↔ centsSemitones ↔ cents ↔ frequency ratio ↔ playback speed, interval names and sample-rate pitch shifts