Does Audio Low-Pass upload my file or text to Tool-You servers?

No. Audio Low-Pass runs in this browser tab. Files stay on the device. Limit note: Audio only. Low-pass 1000–8000 Hz. Output MP3. Max 100 MB.

Should I use Audio High-Pass instead of Audio Low-Pass?

Use Audio Low-Pass when you need Cut high frequencies and export MP3. Use Audio High-Pass when you need Cut low frequencies and export MP3. They share a category (Audio) but not the same job.

Audio Low-Pass

Cut high frequencies and export MP3.

Applies ffmpeg lowpass 1000–8000 Hz, then MP3. Unlike Audio High-Pass this removes treble, not rumble. Unlike Audio Volume the loudness curve is not a single gain. First run downloads the engine.

What Audio Low-Pass does

Applies ffmpeg lowpass 1000–8000 Hz, then MP3. Unlike Audio High-Pass this removes treble, not rumble. Unlike Audio Volume the loudness curve is not a single gain. First run downloads the engine.

Practical limit for Audio Low-Pass: Audio only. Low-pass 1000–8000 Hz. Output MP3. Max 100 MB. That is why output can differ from heavy desktop Audio software. Read the tool-specific note again: Applies ffmpeg lowpass 1000–8000 Hz, then MP3. Unlike Audio High-Pass this removes treble, not rumble. Unlike Audio Volume the loudness curve is not a single gain. First run downloads the engine.

How to use Audio Low-Pass

Stay on this Audio Low-Pass page (/audio/lowpass-audio). Do not switch to Audio High-Pass unless you actually want Cut low frequencies and export MP3..
Add the file type Audio Low-Pass accepts. Hint from the path: audio · lowpass audio. Cut high frequencies and export MP3.
Set only the options that match Audio Low-Pass. Neighbor Audio Volume does something else (Raise or lower loudness and export MP3.). Tool note: Applies ffmpeg lowpass 1000–8000 Hz, then MP3. Unlike Audio High-Pass this removes treble, not rumble. Unlike Audio Volume the loudness curve is not a single gain. First run downloads the engine.
Run Audio Low-Pass in this tab. Browser memory still applies: Audio only. Low-pass 1000–8000 Hz. Output MP3. Max 100 MB.
Download or copy the result from Audio Low-Pass. If it is the wrong job, open Audio High-Pass instead.

When not to use Audio Low-Pass

Skip Audio Low-Pass when a neighbor tool matches better — start with Audio High-Pass or Audio Volume — or when the description already warns the job will fail. In the tool’s own words: Applies ffmpeg lowpass 1000–8000 Hz, then MP3. Unlike Audio High-Pass this removes treble, not rumble. Unlike Audio Volume the loudness curve is not a single gain. First run downloads the engine.

Questions about Audio Low-Pass

What does Audio Low-Pass do that other Audio pages on this site do not?: Applies ffmpeg lowpass 1000–8000 Hz, then MP3. Unlike Audio High-Pass this removes treble, not rumble. Unlike Audio Volume the loudness curve is not a single gain. First run downloads the engine. Short version: Cut high frequencies and export MP3.
Does Audio Low-Pass upload my file or text to Tool-You servers?: No. Audio Low-Pass runs in this browser tab. Files stay on the device. Limit note: Audio only. Low-pass 1000–8000 Hz. Output MP3. Max 100 MB.
Should I use Audio High-Pass instead of Audio Low-Pass?: Use Audio Low-Pass when you need Cut high frequencies and export MP3. Use Audio High-Pass when you need Cut low frequencies and export MP3. They share a category (Audio) but not the same job.
What are the limits of Audio Low-Pass?: Audio only. Low-pass 1000–8000 Hz. Output MP3. Max 100 MB. Also: Applies ffmpeg lowpass 1000–8000 Hz, then MP3. Unlike Audio High-Pass this removes treble, not rumble. Unlike Audio Volume the loudness curve is not a single gain. First run downloads the engine.