StudioWavePro — Online Audio Editor with 48+ Studio Tools

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A high pass filter is the most-used cleanup move in all of audio: it lets the highs through and turns down everything below the cutoff, which is where the junk lives — traffic rumble, air-conditioning, wind, mic handling thumps, and the general low-end mud that makes recordings sound amateur. StudioWavePro’s version has a cutoff from 20 Hz to 5 kHz (default 200 Hz) and a Resonance/Q control (0.1–10) for shaping the knee.

The built-in guidance matches studio practice: around 100 Hz removes rumble most voices never use; 200–300 Hz cleans up a muddy mix; pushing past 500 Hz starts audibly thinning vocals — sometimes exactly what you want for a telephone or radio voice effect. Everything responds live during preview, so finding the right cutoff is a ten-second sweep.

When to use

Remove traffic, air-conditioner, or building rumble from a location recording.
Clean up wind and handling noise on phone or field recordings.
Cut proximity-effect boominess from a close-miked voice.
De-mud a mix where bass and low-mids pile up.
Create the thin telephone/radio voice effect (high cutoff).
Prepare a voice track to sit over music without fighting the bass.

How to use

Click "Open High Pass Filter" below to launch the editor.
Drop in any audio file — MP3, WAV, OGG, M4A and FLAC are all supported.
Press "Play preview" and raise the Cutoff from 20 Hz until the rumble or mud disappears — for voice, 80–120 Hz is the standard zone.
Leave Resonance near 0.7 for transparent cleanup; raise it only for creative, synth-like effects.
Click Apply, then download as WAV or MP3.

Tips

Almost every voice recording benefits from a high pass at 80–100 Hz — male voices keep their fundamentals, and everything below that is just room and rumble.
Sweep up until the source starts thinning, then back off slightly — that finds the highest safe cutoff, which is where the most junk gets removed.
For mains hum specifically (a tonal 50/60 Hz buzz), the Hum Remover is more surgical — it notches the hum without touching the bass around it.
The telephone-voice trick: high pass at 300–400 Hz, then add a Low Pass at ~3 kHz. Instant phone call.
Music with intentional bass content needs gentle cutoffs (20–60 Hz, to remove only subsonic junk) — a 200 Hz cut would gut the kick and bass.

Frequently asked questions

How do I remove rumble from a recording?: Open the High Pass Filter, press Play preview, and raise the cutoff to around 100 Hz. Low rumble — traffic, ventilation, desk thumps — disappears while voices stay natural. Apply and download. It is the single most common cleanup move in audio production.
What cutoff frequency should I use for voice?: 80–120 Hz is the standard range: high enough to remove rumble and proximity boom, low enough to keep the natural weight of the voice. Use the live preview to find where your particular voice starts to thin and stay just below it.
What is the difference between a high pass filter and a low pass filter?: They are mirror images: a high pass keeps the highs and cuts the lows (rumble removal); a low pass keeps the lows and cuts the highs (harshness/hiss removal, muffling effects). The names describe what is allowed through.
Will a high pass filter remove 50/60 Hz hum?: A cutoff above 60 Hz does reduce mains hum, but it also removes all genuine bass below the cutoff, and hum harmonics at 100/120 Hz+ survive. The dedicated Hum Remover notches the hum frequencies specifically and is the better tool for that job.
What does the resonance (Q) setting do?: It shapes the corner at the cutoff. The 0.7 default is flat and natural — right for cleanup. Higher Q values add a resonant bump just above the cutoff, an effect borrowed from synthesizers that can add presence or sound deliberately electronic.
Why do my mixes sound muddy and can this fix it?: Mud is usually a 100–300 Hz pile-up of overlapping low-mids. A high pass on elements that don’t need bass (voice over music, guitars, ambience) clears that range. For a full mix, a gentle 20–40 Hz cut removes inaudible subsonics that waste headroom, and the EQ tools handle the rest.

StudioWavePro is a complete audio editor with 48+ studio-grade tools in one workspace. Trim, master, EQ, time-stretch, denoise, remove vocals, detect BPM and musical key, generate metronomes, and more. Editing tools

Audio Trimmer — crop a track to a selected region

Mute Section — silence a selected region

Reverse Audio — play the track backwards

Fade In/Out — ramp volume at start or end

Silence Trimmer — strip leading and trailing silence

Silence Gap Inserter — insert silence at a chosen position

Audio Looper — repeat a section N times

Audio Splitter — cut a track into multiple parts

Audio Merger — join multiple files end-to-end

Silence Splitter — auto-split at silent gaps

Crossfade Joiner — join clips with overlapping fades

Time and pitch

Speed Changer — speed up or slow down (with optional pitch preservation)

Pitch Shift — change pitch without changing tempo

Tempo Detector — estimate the BPM of a music track

Key Detector — estimate the musical key

Metronome Generator — create a click track at any BPM

Effects

Volume — make a track louder or quieter

Bass Boost — lift the low end

Treble Boost — lift the high end

Low Pass Filter — cut off high frequencies

High Pass Filter — cut off low frequencies (remove rumble)

Equalizer (3-band) — low / mid / high tonal shaping

Equalizer (10-band) — fine-grained tonal control

Echo — add repeating echoes / delay

Distortion — overdrive, fuzz, and lo-fi grit

Stereo Balance — shift the L/R center of a stereo mix

Stereo Widener — make stereo narrower or wider

Vocal Remover — karaoke (center-channel removal)

Hum Remover — strip 50/60 Hz mains hum

Mastering and analysis

Normalize — maximize volume without clipping

Compressor — even out loud and quiet parts

Loudness Meter — measure peak, RMS, and LUFS

Mono Converter — collapse stereo to mono

Channel Extractor — pull L, R, Mid, or Side

Sample Rate Converter — resample to 44.1, 48, or 96 kHz

Polarity Inverter — flip waveform for phase alignment

DC Offset Remover — center waveform around zero

Audio Visualizer — render an animated video from audio

StudioWavePro supports MP3, WAV, OGG, M4A, and FLAC files. Exports include WAV and MP3. This app requires JavaScript to run. Please enable JavaScript in your browser.