Audio High-Pass Filter
Apply a high-pass filter to remove low frequencies from audio. Perfect for cleaning up rumble, removing bass, and reducing boominess in voice recordings and music.
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Complete Guide: Audio High-Pass Filter
Everything you need to know about using this tool effectively
The Audio High-Pass Filter removes low-frequency content below a chosen cutoff point from your audio files. It's the go-to fix for cleaning up rumble from air conditioning, traffic noise, handling bumps on a microphone, and electrical hum that sits in the low end of a recording. All processing runs locally in your browser using the Web Audio API, so your files stay on your device.
This tool uses the Web Audio API's BiquadFilter node to attenuate frequencies below a cutoff point you set. Everything below the cutoff is progressively reduced, letting only higher frequencies pass through unchanged.
Cleaning Up Vocal Recordings
Vocal recordings often pick up low-end rumble from nearby traffic, HVAC systems, or footsteps through the floor. A high-pass filter set around 80–100 Hz removes that mud without affecting the clarity of a speaking or singing voice.
Reducing Microphone Handling Noise
When a microphone gets bumped, tapped, or shifted during a take, it produces a deep thud that dominates the low frequencies. Filtering out everything below 60–80 Hz removes those handling artifacts while keeping the rest of the recording intact.
Fixing Outdoor Field Recordings
Wind hitting a microphone creates a low-frequency rumble that can overpower the sounds you actually want. A high-pass filter is the standard first step for cleaning up outdoor recordings from nature, events, or documentary shoots.
Eliminating Electrical Hum
Audio recorded near electrical equipment or with ungrounded cables can carry a persistent 50 Hz or 60 Hz hum. Setting the cutoff just above that frequency range removes the hum and makes the recording usable again.
Tightening Up a Music Mix
In a dense mix, instruments that don't need low-end energy like acoustic guitars, hi-hats, or backing vocals can clutter the bass range. Filtering them frees up space for kick drums and bass instruments to come through clearly.
Load Your Audio File
Click the upload area or drag and drop your audio file (MP3, WAV, OGG, FLAC, or other common formats) into the tool interface.
Set the Cutoff Frequency
Choose the frequency below which audio will be removed. A typical starting point is 80 Hz for voice or 40 Hz for music. Everything below this frequency gets progressively reduced.
Preview the Filtered Audio
Play back the processed audio using the built-in player. Compare it with the original to make sure you're removing the problem frequencies without cutting into the content you want to keep.
Adjust if Needed
If the result sounds thin, lower the cutoff frequency. If rumble is still audible, raise it. Small adjustments of 10–20 Hz can make a noticeable difference.
Download the Result
Once you're happy with how it sounds, download the filtered audio file to your device.
Start with a lower cutoff than you think you need, then gradually raise it until the rumble disappears - going too high makes audio sound thin
Male voices sit around 85–180 Hz and female voices around 165–255 Hz - set your cutoff below the speaker's fundamental
Apply the high-pass filter before compression or normalization so other tools get cleaner audio to work with
Be cautious with full music mixes as setting the cutoff above 40–50 Hz can strip out bass guitar and kick drum energy
Toggle between the original and filtered versions at the same volume to get an honest assessment of what changed
What frequencies does a high-pass filter remove?
A high-pass filter removes frequencies below its cutoff point. For example, setting the cutoff to 80 Hz will progressively reduce everything below 80 Hz the lower the frequency, the more it gets cut. Frequencies above the cutoff pass through unchanged.
What's a good cutoff frequency for voice recordings?
For most speech, 80–100 Hz works well. This removes rumble and room noise without affecting the natural tone of the voice. For deeper male voices, you might want to go as low as 60–70 Hz to preserve warmth.
Will this remove a constant background hum?
If the hum is in the low-frequency range (like 50 or 60 Hz electrical hum), setting the cutoff above that frequency will reduce or eliminate it. For hum with harmonics at higher frequencies, you may need additional tools like an equalizer for a complete fix.
Is my audio uploaded to a server?
No. The entire filtering process happens in your browser using the Web Audio API. Your audio files are never sent to any server, so your recordings stay completely private.
What audio file formats are supported?
The tool accepts formats your browser can decode, which typically includes MP3, WAV, OGG, FLAC, AAC, and WebM. If your browser can play the file, this tool can process it.
Can I undo the filter after downloading?
No. The filter permanently removes low-frequency content from the downloaded file. Always keep a copy of your original recording so you can go back and try different settings if needed.