AUD · 104 tools
Audio
Convert and compress audio, edit timing, adjust level and tone, apply effects, measure loudness, tempo, key and stereo field, and generate test signals, click tracks, and waveform graphics.
01
2 tools General Audio Tools
001 Delay Time Calculator Turn a tempo into delay times. Reads every note division from 1/1 to 1/64 in straight, dotted, and triplet form, in milliseconds, in hertz for modulation rates, and in samples at 44.1 to 192 kHz. 002 Note to Frequency Converter Convert a note name to its frequency in hertz, or a frequency to the nearest note with its offset in cents. Set the A4 reference between 390 and 500 Hz, and read the MIDI number, the period, and the wavelength alongside it.
02
7 tools Format & Compression
003 Audio Compressor Shrink an audio file by re-encoding it to MP3, AAC, or Opus. Set a bitrate or a target size in megabytes, downsample or downmix to mono, and read the estimated output before the export runs. 004 Audio Converter Convert audio between WAV, MP3, M4A, Ogg Opus, and FLAC. Reads MP3, WAV, FLAC, M4A, AAC, Ogg, Opus, and WebM audio, and keeps the source sample rate and channel count. 005 Audio Sample Rate Converter Resample an audio file to 44.1, 48, 22.05, 16 kHz, or another delivery rate, downmix it to mono, and export it as WAV, FLAC, MP3, M4A, or Ogg Opus. 006 Audio to MIDI Turn a single-line recording into a MIDI file: the pitch track is segmented into notes you can see on a piano roll, then written as a format 0 .mid with the tempo, quantizing, and transposition you set. 007 Bit Depth Converter Requantise audio to 8, 16, or 24-bit PCM with triangular or rectangular dither and optional noise shaping, and write a WAV whose header carries the depth you chose. 008 Extract Audio from Video Pull the audio track out of an MP4, MOV, MKV, WebM, or MPEG-TS file. Copy it into a new container without re-encoding, or decode it to WAV, MP3, M4A, Ogg Opus, or FLAC. 009 MIDI to Audio Turn a .mid file into a WAV: the notes are synthesised in the browser with a waveform per General MIDI instrument family, a drum kit, and a stereo spread across channels.
03
13 tools Editing
010 Add Silence to Audio Pad an audio file with silence before it starts and after it ends, up to 30 seconds each, or drop silence in at the playhead. The source audio is copied through unaltered. 011 Audio Channel Tool Sum a stereo file to mono, swap left and right, send one side to both channels, isolate the difference between them, or flip the phase of a single channel, then write the result as stereo or as a single-channel file. 012 Audio Looper Repeat a range of an audio file up to 200 times into one file, with the loop length snapped to a whole number of bars at the detected tempo and an adjustable blend at each seam. 013 Audio Merger Join several audio files into one, in the order you set. Sources with different sample rates or channel counts are matched to the highest of the set, and each seam is faded so a join does not click. 014 Audio Mixer Layer up to 8 audio files into one, each with its own level, balance, and start time. Tracks play together rather than one after another, and the output takes the highest sample rate and channel count of the set. 015 Audio Reverser Play an audio file backwards and export it in the format it arrived in, either the whole file or a range dragged across the waveform. 016 Audio Silence Remover Find the silent gaps in a recording and cut them out, keeping a set amount of pause at each edit. Set the level that counts as silence, the shortest gap worth removing, and how much to leave behind. 017 Audio Speed Changer Play an audio file from 0.1x to 10x its original speed and keep the pitch where it was, or let pitch rise and fall with tempo the way a tape machine does. 018 Audio Splitter Cut one audio file into equal parts or into fixed-length pieces and download them as a ZIP. Every piece keeps the source format and is cut on an exact boundary. 019 Audio Tag Editor Edit the title, artist, album, track numbers, genre, date, comment, lyrics, and cover art on an MP3, M4A, FLAC, Ogg, or WAV file. The audio is copied across untouched, so nothing is re-encoded. 020 Audio Time Aligner Shift an audio file forward or back by whole samples, or measure the offset against a reference take and correct it. A delay is written as added silence and an advance as a trimmed head, so nothing is resampled. 021 Audio Trimmer Cut a section out of an audio file by dragging a range across the waveform, check the boundaries with looped playback, and export that range in the format the source arrived in. 022 Split Audio by Silence Cut a long recording into separate files at its silent gaps and download them as a ZIP. Set the level that counts as silence, how long a gap has to run before it splits, the padding kept at each edge, and the shortest piece worth writing.
04
31 tools Level & Tone
023 10-Band Graphic Equalizer Cut or boost ten fixed octave bands from 31 Hz to 16 kHz across ±12 dB, with a preamp to make room for the boosts. Every band is a peaking filter at one octave wide. 024 4-Band Parametric EQ Shape a recording with four independent EQ bands, each set to a bell, shelf, high-pass, low-pass, or notch, with its own frequency from 20 Hz to 20 kHz, up to 18 dB of boost or cut, and a Q from 0.1 to 18. 025 Audio Bass Booster Raise the low end of an audio file with a shelf between 40 and 250 Hz, remove everything under a chosen corner first so nothing subsonic gets amplified, and generate an octave below the band when the recording has nothing down there to raise. 026 Audio Clipper Flatten peaks against a fixed ceiling with soft, cubic, or hard curves, 8x oversampled, with threshold from -24 dB and a wet/dry mix. 027 Audio De-esser Compress only the sibilant band of a vocal recording. Set the crossover frequency between 2 and 14 kHz, a threshold, and how many dB the harsh band is allowed to fall, in split band or wideband mode. 028 Audio Declipper Rebuild peaks that a recorder flattened against full scale. Set the level that counts as clipped, the longest run to repair, how much of the reconstructed curve to apply, and an output gain that keeps the restored peaks under 0 dBFS. 029 Audio Denoiser Reduce steady background hiss, hum, and room tone with a noise floor that keeps adapting as the file plays. 030 Audio Enhancer Clean up a recording in one pass: rumble, background noise, sibilance, tone, and level, driven from five controls instead of twenty-four. 031 Audio Equalizer Three-band EQ with a low shelf from 30 to 250 Hz, a mid bell sweepable from 100 Hz to 10 kHz with adjustable width, and a high shelf from 2.5 to 16 kHz, each across ±18 dB. 032 Audio Exciter Generate harmonics from the band above a corner frequency and add them over the original signal. Set the frequency between 1 and 12 kHz, the amount, and whether the added harmonics are odd or even order. 033 Audio Expander Push quiet passages further down on a ratio up to 8:1, with threshold, soft knee, attack, release, and a range floor from -60 dB. 034 Audio Fade In and Out Add a fade-in at the start and a fade-out at the end of an audio file, with a linear, equal-power, or exponential curve and lengths up to 30 seconds each. 035 Audio Filter (Low-Pass and High-Pass) Run an audio file through a low-pass, high-pass, band-pass, or notch filter with a log cutoff sweep from 20 Hz to 20 kHz, adjustable resonance, 12 or 24 dB/octave, and a wet/dry mix. 036 Audio Hum Remover Notch out mains hum at 50 or 60 Hz along with up to four harmonics. Set the fundamental, how many harmonics to follow, the notch width, and how far each one drops. 037 Audio Limiter Raise the level of an audio file against a ceiling that peaks cannot cross, using 5 ms of lookahead, an input gain, and an adjustable release. 038 Audio Noise Gate Mute an audio file while it sits below a threshold, with hysteresis, hold, attack, release, and a range control that sets how far the closed gate attenuates. 039 Audio Normalizer Measure a file to ITU-R BS.1770-4, then apply the gain that lands it on a loudness target such as -14 LUFS or on a true peak ceiling, with an optional limiter holding the peaks. 040 Audio Reverb Remover Reduce room reverb on a recording by subtracting its own decaying tail. Set the room decay time, how much of the tail comes off, and a limit on the attenuation. 041 Audio Sidechain Compressor Duck an audio file's level on a rhythmic pulse, the pumping effect normally driven by a kick drum on a second track. 042 Audio Stereo Width Widen or narrow the stereo image of an audio file from 0 to 200%, pan it with constant-power gains, and fold the side channel to mono below a crossover you set. 043 Audio Tilt EQ Tilt the balance of an audio file across ±12 dB around a pivot between 200 Hz and 4 kHz, cutting one end by the same amount it lifts the other. 044 Audio Transient Shaper Raise or cut the attack and the sustain of a recording separately, with no threshold to set. Two envelope followers compare fast and slow level, and the difference between them drives the gain. 045 Audio Volume Changer Raise or lower the level of an audio file by a set number of decibels, compare the result against the original while it plays, and export it in the format the source arrived in. 046 Click and Pop Remover Find impulsive ticks, pops, and dropouts and interpolate across them, with controls for sensitivity, the longest click to repair, and how much of the repair to apply. 047 DC Offset Remover Recentre a waveform that sits above or below zero, with a corner frequency from 0 to 40 Hz, and export in the format the file arrived in. 048 Dynamic EQ Cut one band only while it gets too loud, or lift it only while it falls too quiet. Set the shape, frequency, Q, threshold, ratio, range, attack, and release, and hear the band move before exporting. 049 Dynamic Range Compressor Compress the dynamic range of an audio file with threshold, ratio, knee, attack, release, and makeup gain, and hear the result before exporting. 050 Gain Automation Draw a level curve over an audio file and export the ride. Points are set in seconds and decibels, the ramp between them is interpolated on the decibel scale, and the curve holds flat outside the first and last point. 051 Mid/Side Encoder and Decoder Convert a stereo file between left/right and mid/side, or set the level of the centre and the sides separately across ±24 dB. Encode writes M and S as the two channels of the output; decode reads them back as L and R. 052 Multiband Compressor Compress low, mid, and high bands on separate thresholds. Set the two crossover points, one threshold per band, then a shared ratio, attack, release, and makeup gain. 053 Vocal Remover Cancel the centre of a stereo mix to pull the lead vocal out, with a protected band below and above so the bass and the cymbals survive. Strength, band limits, and a wet/dry mix are all adjustable, and an isolate mode keeps the centre instead.
05
34 tools Effects
054 Amp Simulator Run a direct guitar or bass track through a preamp, a bass/middle/treble tone stack, and a speaker cabinet, with three channels and five cabinet voicings. 055 Audio Autopan Sweep an audio file's stereo image left and right at a set rate using constant-power panning, with sine, triangle, or square shapes. 056 Audio Beat Repeat Capture a slice on a tempo grid and loop it, for stutters and glitch fills. Set the tempo, the grid, the slice length, and how often a step repeats. 057 Audio Bitcrusher Reduce an audio file to between 1 and 16 bits and divide its sample rate by up to 64, with a wet/dry mix, for quantisation noise and aliasing. 058 Audio Chorus Add a chorus effect to an audio file with up to 3 modulated voices, a 0.05 to 5 Hz rate, depth in milliseconds, stereo spread, and a wet/dry mix. 059 Audio Comb Filter Ring a tuned delay against the signal for evenly spaced peaks or notches. Set the tuning in Hz, the resonance, the damping, and whether the harmonics are all present or odd only. 060 Audio Distortion Apply soft clip, hard clip, or foldback distortion to an audio file, with drive, a post-shaper tone filter from 400 Hz to 12 kHz, and wet/dry mix. 061 Audio Doubler Stack two drifting copies of a take either side of the original, with delays from 5 to 60 ms, adjustable spread, drift depth and rate, and stereo width. 062 Audio Echo Add delay-based echo to an audio file, with delay times from 10 ms to 2000 ms, adjustable feedback, wet/dry mix, and ping-pong bouncing between stereo channels. 063 Audio Flanger Add a flanger to an audio file with a sweeping sub-10 ms delay, positive or negative feedback up to 90%, adjustable base delay, stereo phase offset, and a wet/dry mix. 064 Audio Formant Shifter Move the resonances of a voice up or down by ±12 semitones and 50 cents while every partial stays at its original frequency, so the pitch does not change. 065 Audio Frequency Shifter Slide every partial in a file by the same number of hertz, from -1000 Hz to +1000 Hz, using single-sideband modulation with feedback and a stereo offset. 066 Audio Harmonizer Layer two pitch-shifted voices at musical intervals under or over an audio file to build harmony automatically. 067 Audio Phaser Add a phaser to an audio file with 2 to 8 all-pass stages, a logarithmic sweep from 200 Hz, feedback up to 80%, and a wet/dry mix. 068 Audio Pitch Correction Snap a sung or played note to the nearest pitch in a key. Set the key and scale, then control how hard and how quickly each note is pulled into tune. 069 Audio Pitch Shifter Shift pitch by up to 12 semitones plus 50 cents of fine tune while the file keeps its exact length. Every partial moves by the same ratio, so the result lands under a cent from the target note. 070 Audio Reverb Add reverb to an audio file with controls for room size, damping, pre-delay, and wet/dry mix. The export continues past the end of the source so the decay finishes. 071 Audio Tape Saturation Run an audio file through a tape machine: up to 24 dB of drive, a head bump at 65 Hz, wow at 0.7 Hz, flutter at 7.3 Hz, and adjustable hiss. 072 Audio Tremolo Modulate the level of an audio file from 0.1 to 20 Hz with sine, triangle, or square shapes, adjustable depth, and a stereo phase offset for auto-pan. 073 Audio Vibrato Modulate the pitch of an audio file from 0.1 to 12 Hz with adjustable depth in milliseconds, a stereo phase offset, and a wet/dry mix. 074 Audio Vinyl Simulator Add turntable pitch wobble, surface crackle, and a rolled-off top end to an audio file for a lo-fi vinyl character. 075 Audio Vocoder Print the band-by-band level of an audio file onto a synthesized sawtooth, pulse, or noise carrier, across 8, 16, or 24 bands from 120 Hz to 7.5 kHz. 076 Auto-Wah Sweep a resonant band-pass filter with the level of the signal itself. Set sensitivity, the base frequency, how many octaves the sweep covers, resonance, release, and the wet/dry mix. 077 Gated Reverb Put a track in a large bright room and cut the room off with a gate keyed to the source, with controls for threshold, hold, and release. 078 Grain Delay Repeat short grains cut from the recent past instead of repeating the signal, with grain size, transposition, spray and feedback as separate controls. Each repeat is cut from the last one, so the texture drifts further from the source on every pass. 079 Plate Reverb Run audio through a modelled studio plate, with decay, damping, modulation and pre-delay. Dense from the first millisecond, with no audible individual reflections. 080 Reverse Delay Record audio in grains and play each one backwards, so every note is preceded by its own swell, with controls for grain length, feedback, and stereo spread. 081 Ring Modulator Multiply an audio file by a carrier tone from 5 Hz to 4 kHz with sine, triangle, or square shapes, a stereo phase offset, and a wet/dry mix. 082 Rotary Speaker Run audio through a spinning horn and drum cabinet with a shared rate from 0.1 to 8 Hz, a depth control for the pitch and level swing, stereo width, and a wet/dry mix. 083 Shimmer Reverb Add a reverb whose tail is transposed on every pass round the loop, so it climbs away from the source instead of decaying with it. Decay, shimmer amount, interval, damping and pre-delay are separate controls. 084 Spectral Blur Smear a sound across time and frequency until its edges are gone. Blur stretches every frequency band forward in time, Spread turns a pitch into a band, and Scatter disperses the waveform without moving any energy in frequency. 085 Spring Reverb Run audio through a modelled spring tank, with tension, decay and damping. The dispersive delay gives the chirped boing a room reverb cannot produce. 086 Trance Gate Chop audio into a sixteen-step rhythmic pattern locked to a tempo, with eight patterns, five note divisions, swing, and adjustable gate edges. 087 Wavefolder Fold a waveform back on itself instead of clipping it, so the harmonics move with the envelope. Fold depth, symmetry, one to three cascaded stages, and a sine or triangle folding curve.
06
12 tools Analysis
088 Audio Loudness Meter Measure integrated LUFS, short-term and momentary maxima, loudness range, and true peak to ITU-R BS.1770-4, then compare the result against the delivery targets for streaming, podcast, and broadcast. 089 Audio Metadata Viewer Read the container, codec, sample rate, channel count, duration, average bitrate, and embedded title, artist, and album tags of an audio file, and copy the whole report as JSON. 090 Audio Null Test Subtract one audio file from another and read how far the difference sits under the source. The offset between the two is found by cross correlation first, so takes that start a few samples apart still cancel. 091 Audio Quality Analyzer Read an audio file's spectral cutoff, clipped sample runs, DC offset, noise floor, and true peak in one pass, and compare the cutoff against the frequency each encoder usually stops at. 092 Audio Spectrum Analyzer Plot the average magnitude spectrum of an audio file with peak hold, on a log or linear frequency axis. Set the FFT size from 1024 to 16384 samples and read the level of any band in dBFS. 093 BPM Detector Find the tempo of an audio file from its onset pattern, with a confidence figure, the half and double time candidates, and the beat lengths in milliseconds for setting a delay or a modulation rate. 094 Instrument Tuner Tune a guitar, bass, ukulele, violin, viola, or cello from the microphone, with a cents meter, per-string targets, and a concert pitch you can move between 415 and 466 Hz. 095 Key Detector Find the musical key of an audio file from its chromagram, with the Camelot code, the confidence, the relative and parallel alternatives, and the full 24-key score table. 096 Pitch Detector Track the fundamental frequency of a recording over time with the YIN difference function, and read the median pitch as a note name, a MIDI number, and its deviation in cents. 097 Spectrogram Plot how an audio file's spectrum changes over time, with an FFT size from 512 to 8192, a log or linear frequency axis, an adjustable floor, and a PNG export. 098 Stereo Field Analyzer Read an audio file's phase correlation, mid and side levels, left-right balance, and per-band correlation, with a goniometer scatter and the level a mono sum would cost. 099 Tap Tempo Tap along to find the BPM of a track, with a rolling average, the spread across your taps, and every note length in milliseconds for setting a delay or an LFO.
07
5 tools Generators
100 Audio Recorder Record from a microphone straight to WAV, MP3, M4A, Ogg, or FLAC, with a level meter before you start and a choice of sample rate, channels, and bit depth. Echo cancellation, noise suppression, and automatic gain are all off. 101 Metronome Write a click track as a WAV: tempo from 20 to 300 BPM, 2/4 to 6/8, quarters through sixteenths, three click sounds, an adjustable accent, and a length set in bars. 102 Noise Generator Write white, pink, or brown noise as a WAV file. Set the level in dBFS, duration, mono or stereo, sample rate, and 16, 24, or 32-bit PCM, with each channel generated separately. 103 Tone Generator Write a sine, square, triangle, or sawtooth tone, or a linear or logarithmic sweep, as a WAV file. Set frequency, level in dBFS, duration, channels, sample rate, and 16, 24, or 32-bit PCM. 104 Waveform Image Generator Draw an audio file's waveform as a PNG or SVG at any size, with bar, filled, or line styles, adjustable bar width and gap, a transparent or solid background, and a peaks JSON export.