Comprehensive Audio Toolkit
Edit, enhance, convert, and master audio tracks directly in your browser. Every tool runs 100% client-side in 32-bit float memory with instant preview and lossless export.
Combine multiple audio tracks sequentially into one file with custom silence gaps, automatic sample-rate synchronization, and lossless WAV/MP3 export.
Divide audio files into equal parts (2–6 parts) or fixed duration intervals (15s–120s) with instant individual or batch segment downloads.
Windowed-sinc resampling between 22.05, 32, 44.1, and 48 kHz with polyphase anti-aliasing filters that preserve audio pitch and duration.
Scale audio track volume mathematically so the loudest transient reaches -0.3 dBFS, -1.0 dBFS, or -3.0 dBFS without distortion.
Rhythmically modulates audio between left and right channels with a real StereoPanner LFO. Mono sources are widened to stereo first.
Sets a static stereo pan position with a StereoPanner node. 50% is center; lower values move left, higher values move right.
Mid/side stereo widening that boosts the difference signal. Mono sources pass through unchanged, and a wider side signal loses some mono compatibility when summed.
Psychoacoustic Haas effect (precedence delay) introduces a subtle 12–35 ms time offset between stereo channels to produce an expansive, immersive stereo field from narrow or centered audio.
Modulated delay line with sinusoidal LFO creates lush, shimmering stereo dimension and subtle comb-filter movement.
Custom multi-band parametric tone shaping: Low-Shelf (120 Hz), Peaking Mid (2.4 kHz), High-Shelf (9 kHz).
Shifts the whole mix down by 432/440 (−31.77 cents), assuming the source is tuned to A=440. Implemented as varispeed, so tempo also drops by about 1.8%.
Transposes musical pitch up or down by discrete semitones. Uses playback-rate resampling, so tempo shifts in parallel with pitch.
Adjusts playback speed from 30% to 180%. Because this is playback-rate resampling, pitch shifts together with tempo (no independent time-stretch).
Inverts sample buffers back-to-front for surreal backwards swells and reverse transitions.
Sample-rate decimation and word-length quantization for authentic vintage sampler, arcade, and chiptune degradation.
Steep 24 dB/oct cascaded high-pass filter clearing sub-audible DC offset and infrasonic rumble below 30 Hz without diminishing musical bass.
High-passes low-frequency microphone thumps, footstep rumble, and HVAC vibration. (Frequency-selective rumble cutting — not broadband hiss/noise removal.)
Subtle 2.5:1 dynamic control with a gentle knee that smooths out volume spikes transparently without pumping.
Fast-reacting vocal dynamics compressor paired with an 80 Hz rumble cut: tames plosives, catches peaks, and elevates quiet phrases.
Re-centers the audio waveform to true zero-crossing, removing asymmetric DC offset bias and infrasonic rumble to recover headroom.
Boosts or attenuates overall level from −18 dB to +12 dB. If peak protection is enabled in the export panel, the look-ahead limiter catches the resulting overs.
Crops and trims the audio start and end times to export only the selected segment.
Applies smooth, non-destructive linear amplitude fades to the start and finish of your audio to create clean song intros, transitions, and fadeouts without abrupt clicks.
Downmixes stereo multi-channel audio to a single coherent mono channel using 0.5 * (L+R).
Estimates tempo from transient-energy autocorrelation of the decoded PCM, then optionally shifts playback speed. (Statistical estimate — accuracy varies with sparse or syncopated material.)
Full-featured studio compressor: configurable threshold, ratio, attack, release, knee, makeup gain, and parallel wet/dry blending.
Mid/Side stereo processing isolates or removes centered audio (vocals and lead instruments) while preserving low-end kick and bass via a crossover filter.
Transcodes audio between WAV (16/24/32-bit float), MP3 (128–320 kbps), and AIFF directly in-browser. MP3 encodes only at 32, 44.1, or 48 kHz; WAV/AIFF can render up to 96 kHz.
Gentle finishing curve: 80 Hz sub shelf, 1 kHz glue, 12 kHz air, plus the engine's 5 ms look-ahead limiter at −0.3 dBFS sample peak (not LUFS loudness normalization).
Classic VCA-style master bus glue compression (2:1 ratio, moderate attack, smooth release) that unites mixed elements into a cohesive master.
Every tool runs locally using Web Audio API and 32-bit floating-point linear PCM buffers. No audio bytes are ever sent to external cloud servers, and buffers are wiped immediately when your tab closes.
