AUD · 153 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.
Every effect here also runs as a track effect in Oxyd, the multitrack editor built on the same DSP: cut, mix, record, and export with chapters. Open Oxyd
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
11 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 Data Converter Read the raw samples of an audio file out as CSV, JSON or a C array, as floats or 8-bit and 16-bit integers, and turn a column of numbers back into a WAV at a chosen sample rate. For firmware, notebooks and tests. 006 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. 007 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. 008 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. 009 DTMF Tone Generator and Decoder Turn a keypad sequence into touch-tone audio as a WAV, or read the digits back out of a recording or live from the microphone. Tone and gap lengths, level, sample rate and bit depth are set per file. 010 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. 011 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. 012 Morse Code Audio Encoder and Decoder Key text as a Morse tone at a chosen speed, with Farnsworth spacing, pitch and level, and download it as a WAV. Or decode Morse audio back to text from a recording or live through the microphone, with the speed measured from the keying. 013 SSTV Encoder and Decoder Turn a picture into slow-scan TV audio in Robot 36, Martin M1, Scottie S1, PD 120, or PD 180, or decode SSTV back into a picture from a recording or live through the microphone, including ISS (ARISS) transmissions.
03
17 tools Editing
014 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. 015 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. 016 Audio Crossfade Joiner Join audio files so each one fades into the next. Set one overlap length or a different one per seam, trim silent ends before they fade, and listen to every seam before exporting. 017 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. 018 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. 019 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. 020 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. 021 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. 022 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. 023 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. 024 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. 025 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. 026 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. 027 CUE Splitter Split a single-file album rip (FLAC, WAV, MP3, M4A) into one file per track using its .cue sheet, with titles, artist, album and track numbers written as tags. 028 MIDI Editor Open a MIDI file in a piano roll, then draw, move, stretch, transpose, quantize, and delete notes, change the tempo and each channel's instrument, play it, and save it as MIDI or render it to WAV. 029 Sample Slicer Cut a drum loop or a phrase at its transients. Onsets are found by spectral flux, each slice starts a few milliseconds before its hit, and the slices download as a ZIP with their start times as CSV or JSON. 030 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
40 tools Level & Tone
031 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. 032 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. 033 Audio Auto-Leveler Ride the gain toward a target RMS level as the file plays, lifting quiet passages and holding loud ones back, with a gate that stops it from pulling up the noise floor. 034 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. 035 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. 036 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. 037 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. 038 Audio Denoiser Reduce steady background hiss, hum, and room tone with a noise floor that keeps adapting as the file plays. 039 Audio Enhancer Clean up a recording in one pass: rumble, background noise, sibilance, tone, and level, driven from five controls instead of twenty-four. 040 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. 041 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. 042 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. 043 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. 044 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. 045 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. 046 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. 047 Audio Mic Bleed Remover Turn down the other person's voice where it leaks into this microphone, from two separate recordings. The tool learns how far down the other voice sits and lowers it by up to 40 dB only where this person is not speaking. 048 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. 049 Audio Noise Reduction Learn what the background noise sounds like from a stretch of room tone, then subtract that noise profile from the whole recording. 050 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. 051 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. 052 Audio Room Tone Fill the silent gaps in a recording with its own room sound, learned from a quiet moment, so a cut never drops to nothing. Set the level under which a gap is filled, between -90 and -30 dBFS, and how fast the room fades in. 053 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. 054 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. 055 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. 056 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. 057 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. 058 Auto Ducker Drop the music under a voice track wherever it speaks: two files in, one mix out, with threshold, depth, attack, hold and release. 059 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. 060 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. 061 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. 062 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. 063 EQ Match Copy the tonal balance of a reference track onto a recording. The long-term spectra of both are compared in 96 bands and the difference is applied as a smoothed curve, limited to the number of decibels you allow. 064 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. 065 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. 066 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. 067 Pitch Editor Move single notes of a vocal or an instrument line up or down. The recording is split into notes on a piano roll; drag one to a new semitone, or tune every note to its nearest, and the rest of the take keeps the pitch it was sung at. 068 Spectral Repair Draw a box over a cough, a creak, a chair or a phone on the spectrogram and have it filled from the texture just before it, or turned down by a set amount. Everything outside the boxes is left untouched. 069 Virtual Bass Make a bass line read on a phone or laptop speaker: the sub band the speaker cannot play is taken out and its harmonics are generated in a range it can, so the ear supplies the missing fundamental. 070 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
48 tools Effects
071 8D Audio Converter Turn a song into 8D audio: the sound circles your head on headphones, using interaural delay, level difference, and head shadow, with the orbit time, direction, and width under your control. 072 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. 073 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. 074 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. 075 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. 076 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. 077 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. 078 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. 079 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. 080 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. 081 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. 082 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. 083 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. 084 Audio Harmonizer Layer two pitch-shifted voices at musical intervals under or over an audio file to build harmony automatically. 085 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. 086 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. 087 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. 088 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. 089 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. 090 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. 091 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. 092 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. 093 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. 094 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. 095 Binaural Panner Place a sound at an angle and a height around the listener's head for headphones, using measured head-related transfer functions: azimuth from -180 to 180 degrees, elevation from -40 to 90, a stereo width, a distance, and the KEMAR dummy-head set behind it. 096 Convolution Reverb Put a recording in a real space using its impulse response: attach a recording of the room, or pick one of four synthesized rooms, then set pre-delay and mix. 097 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. 098 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. 099 Granular Synthesizer Rebuild a sound from grains of itself. Set the grain length, how many start per second, where in the source they read from and how fast that point moves, then pitch, spray and stereo spread, and render as long an output as you want. 100 Haas Stereo Widener Turn a mono recording into wide stereo by delaying one side 1 to 40 ms, the Haas effect, with the bass kept in the centre so it survives playback in mono. 101 Headphone Crossfeed Feed a little of each channel into the other, low-passed and a third of a millisecond late, so hard-panned stereo sits in front of you on headphones instead of inside your head. bs2b-style, baked into the file. 102 Lo-fi Audio Effect Make a clean recording sound like a cassette, a worn record, or a 12-bit sampler: wow and flutter, hiss and crackle, quantisation grit, and a narrowed frequency band from five controls. 103 Multitap Delay Lay up to eight repeats on an audio file at once in a pattern: evenly spaced, a bouncing ball that speeds up or slows down, dotted or triplet, each repeat quieter and darker than the last, alternating left and right, with feedback that repeats the whole shape. 104 Paulstretch Stretch audio up to 50 times longer with the Paulstretch algorithm, turning a song or a single chord into a slow, evolving drone. Set the window size and stereo linking, preview 20 seconds, and export in the format the file arrived in. 105 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. 106 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. 107 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. 108 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. 109 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. 110 Slowed + Reverb Maker Slow a song down with the pitch dropping alongside it, then put it in a large reverb, the slowed and reverb sound, or speed it up for a nightcore version. 111 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. 112 Spectral Delay Delay each frequency band of an audio file by its own time: set a delay for the lows, another for the highs and the frequency where the curve crosses, with feedback per band and a mirrored curve on the right channel for width. 113 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. 114 Tape Stop Effect Slow a track to a halt like a tape machine or turntable losing power, or spin it up from a standstill, at the end of the file or at any point, with the music back on time afterwards. 115 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. 116 Voice Changer Move a recorded voice to another speaker: pitch and throat size set separately, plus the colour that makes it a robot, a monster, or a radio. 117 Vowel Filter Run audio through the formants of a sung vowel and morph from A to U by hand, with an LFO, or with the signal's own level. Resonance sets how sharp the vowel is, and the mix blends it with the dry sound. 118 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
24 tools Analysis
119 ABX Blind Tester Tell two audio files apart under blind conditions. A and B are aligned and level-matched, X is one of them picked at random each trial, and the score reports how likely your hits are by guessing. 120 Audio Feature Extractor Measure an audio file frame by frame: RMS, zero-crossing rate, spectral centroid, spread, rolloff, flatness, flux and 13 MFCCs, as CSV or JSON with a time column, for notebooks, classifiers and plots. 121 Audio Latency Tester Measure the round-trip audio latency of this device: a click plays through the speakers, the microphone hears it, and the delay between the two is found by cross-correlation, over several trials, in milliseconds. 122 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. 123 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. 124 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. 125 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. 126 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. 127 BPM Detector Find the tempo of a song and its beat grid: every beat and bar line drawn on the waveform, the time signature and the one, a tempo curve that shows drift, and the grid exported as markers for Oxyd or Audacity, a click track aligned to the song, or a MIDI tempo map for a DAW. 128 Chord Detector Read the chords of a song from an audio file: a timeline of major and minor triads with their start times, the changes snapped to the beat, a chart by bars with the key on top, and the chords exported as markers for Oxyd or Audacity. Reads the chromagram, not a MIDI file. 129 Decibel Meter Measure sound level from the microphone with A, C, or Z weighting, Fast, Slow, or Impulse response, a running Leq, Lmax, Lmin, L10 and L90, and a calibration offset that turns the digital reading into a sound pressure level. 130 Dynamic Range Meter (DR Value) Measure the DR value of an audio file the way the TT dynamic range meter does: the loudest fifth of its 3-second blocks against the second-highest sample peak, per channel and as the integer the loudness-war database files a release under, next to its LUFS and loudness range. 131 Formant Analyzer Track the formants of a speech recording by linear prediction, Praat's method: F1 to F5 with their bandwidths every 10 ms, pitch and voicing on each frame, a vowel chart of F1 against F2 with reference vowels, and a CSV or JSON table for the notebook. 132 Impulse Response Capture Measure a room's impulse response with a sine sweep: a sweep plays through the speakers, the microphone records the answer, the recording is deconvolved to the room's response and saved as a WAV, with its decay, frequency response and mid-frequency reverberation time read on the spot. 133 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. 134 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. 135 Microphone Test Check a microphone before a call or a recording: live peak and RMS level in dBFS, per-channel meters, waveform and spectrum, clipping and DC offset checks, and a switch for the browser's voice processing. 136 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. 137 Reverb Time Analyzer (RT60) Measure a room's reverberation time from a recorded clap, balloon pop or impulse response: T20, T30 and EDT per octave band from 63 Hz to 8 kHz by backward integration, the ISO 3382 method, with the decay curve, the fit and how far each band sits above the noise floor. 138 Speaker and Headphone Test Check a stereo pair from the browser: left and right channel identification, a repeating 20 Hz to 20 kHz sweep, a steady tone at any frequency, and a polarity check that reveals a reversed speaker cable. 139 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. 140 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. 141 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. 142 Voice Quality Report (Jitter, Shimmer, HNR) Measure a sustained vowel the way Praat's voice report does: jitter local, RAP and PPQ5, shimmer local, APQ3, APQ5 and APQ11, the harmonics-to-noise ratio, pitch statistics and the fraction of unvoiced frames, as a table, JSON or CSV.
07
11 tools Generators
143 8-Bit Music Maker Write chiptune music on a step grid for the four voices of the NES sound chip, two pulse waves, a triangle, and a noise channel, loop it while you edit, and download it as a gap-free WAV loop or a four-channel MIDI file. 144 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. 145 Chord Progression Generator Type chords or pick a progression in any key, hear it loop with smooth voice leading on piano, strings, pad, or organ, and download it as a gap-free WAV loop or a MIDI file with chords and bass on separate channels. 146 Image to Spectrogram Turn a picture into a sound that draws the picture in a spectrogram: each row of the image becomes a sine wave at its own frequency, each column a slice of time. Set the length, frequency range, scale, and resolution, then download a WAV. 147 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. 148 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. 149 Online Drum Machine Program a sixteen-step drum pattern with kick, snare, clap, closed and open hats, and tom, loop it while you edit, then download it as a seamless WAV loop or a General MIDI drum file. 150 Online Synth Keyboard Play a two-octave synth keyboard with the mouse, a touchscreen, your computer keys, or a USB MIDI keyboard, with piano, organ, strings, pad, and eleven more voices, then record a take and download it as WAV or MIDI. 151 Retro SFX Generator Generate 8-bit style game sound effects from one oscillator, an envelope, and a frequency slide, then export them as WAV at 16, 24, or 32-bit. 152 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. 153 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.