Audio Processing

Transcribe audio into sheet music using the Basic Pitch neural network running in your browser. Handles humming, singing, solo instruments, piano, guitar, and full mixes; record straight from the mic or transcribe any section of a file. Beat-aligned quantization detects tempo, grid phase, and pickup bars; detection settings re-tune instantly without re-running the model, and an interactive piano roll lets you remove wrong notes by clicking. A/B playback compares the original audio with the quantized score (with a follow-along cursor), and exports cover MIDI, MusicXML, PDF, SVG, PNG, or print.

Ten-band graphic EQ that draws the real frequency response from the filter coefficients, matching the rendered audio to 0.03 dB. Clip-safe export, transparent bypass, per-band bandwidth control.

Fade in and out with five curve shapes: linear, exponential, logarithmic, S-curve and equal power. The graph, the preview and the exported file all come from the same function.

Convert between MP3, WAV, OGG, AAC, M4A and FLAC with a bitrate, sample rate, channel count and bit depth that all reach the encoder, and a panel that reports what was actually written.

Join clips end to end or stack them on one timeline, with an equal-power crossfade that holds the level through the join, BS.1770 loudness matching between files, and the merged result measured before you download it.

Shift pitch by semitones and cents with WSOLA, keeping the length or changing it like tape speed. Measures its own output and reports the error in cents: a perfect fifth lands within 0.5 cents.

Full-track spectrogram with a calibrated dBFS colour scale, labelled Hz axis, and log or linear frequency. Plus four live modes, microphone input, a peak-frequency and note readout, and PNG or WebM export.

Change tempo from 0.25x to 4x with WSOLA, holding pitch to within half a cent, or let pitch move with it like tape. Measures the output and shows how far the pitch actually went.

Cut a region out of any audio file, exact to the sample and measured at zero milliseconds of error. Waveform handles, real keyboard shortcuts, click-free cut fades, and WAV or MP3 output that matches its extension.

Normalize to real ITU-R BS.1770-4 loudness, within 0.04 LU of ffmpeg, with an enforced true peak ceiling. Measures the processed file and shows where it actually landed.

Turn audio into a waveform image in five styles, exported as PNG or real vector SVG. Reads every channel, shows true level in dBFS, and redraws correctly at any size.

Detect tempo from onset autocorrelation, within 0.20 BPM across thirteen known-tempo fixtures. Draws the beats it found and plays them back as a click so you can check by ear.

Attenuate everything below a threshold by a set number of dB, with hold, hysteresis and lookahead. Draws the gain reduction over the waveform and reports what it measured.

Record from a microphone with the browser's call processing off by default, a level meter in real dBFS with a clipping indicator, and a length taken from the audio rather than the clock.

Sample-accurate metronome from 20 to 400 BPM: no drift, tap tempo, subdivisions, swing, odd meters with correct accent groupings, a speed trainer, dropped bars, and WAV click-track export.

Convolution reverb with a reverberation time you set in seconds and the tool measures back off the response it built. Deterministic, so the download is the reverb you previewed; the impulse response is downloadable too.

Cut a ringtone, notification or alarm from any audio file, snap it to the beat so a repeat does not stutter, and set it to a loudness that holds up against the phone's own tones. Exports .m4r, .mp3 and WAV.

Find silent sections across every channel, not just the left. Threshold, hysteresis, minimum length, and cut padding all re-run instantly. Export a tightened WAV or MP3, split into clips as one ZIP, or save the timeline as CSV or JSON.

Read text aloud with any voice your system provides, with sentence-by-sentence progress that works even for voices that report no word boundaries, and a reading-time estimate calibrated from the voice you pick.

Generate band-limited test tones, sweeps and noise from 20 Hz to 20 kHz. Up to eight voices, note-name entry, binaural beats, and WAV export rendered from the same oscillators you hear.

Pull centred content out of a stereo mix by spectral masking or phase cancellation, with both stems from one pass and a measured report of how far the vocal moved and what it cost everything else.

Real pitch shifting in semitones that keeps the recording the same length, with speed as a separate control. Nine presets plus ring modulation, distortion, filters and echo.