In the "Background Noise" panel, you'll see "Filter Type" and "Filter Frequency." This is a powerful sound-shaping tool that lets you sculpt your White, Pink, or Brown noise.
A filter works by "passing" (allowing) some frequencies and "cutting" (blocking) others.
The 4 Filter Types Explained
1. Allpass (The Default)
This is not really a filter. It lets *all* frequencies pass through. If you select "Pink Noise," you hear 100% of the Pink Noise.
2. Lowpass Filter (The "Muffler")
This is the most useful filter. A Lowpass filter lets low frequencies pass and cuts high frequencies.
- What it does: It "muffles" the sound, removing the "hiss" and making it sound "warmer" or "darker."
- How to use it: Set "Noise Type" to Pink Noise. Set "Filter Type" to Lowpass. Set "Filter Frequency" to 2000 Hz. Now, you'll only hear the parts of the Pink Noise *below* 2000 Hz. This is *perfect* for sleep or focus, as it removes the harsh, hissy top end.
3. Highpass Filter (The "Thinner")
This is the opposite of a Lowpass. It lets high frequencies pass and cuts low frequencies.
- What it does: It "thins out" the sound, removing the "rumble" and "bass."
- How to use it: Set "Noise Type" to Brown Noise (which is very rumbly). Set "Filter Type" to Highpass. Set "Filter Frequency" to 500 Hz. You'll hear the "rumble" disappear, leaving only the "mid-range" part of the noise.
4. Bandpass Filter (The "Isolator")
This is a combination of the two. It cuts *both* the low and the high frequencies, letting only a "band" in the middle pass through.
- What it does: It makes the noise sound "thin" and "telephonic."
- How to use it: Set "Noise Type" to Pink Noise. Set "Filter Type" to Bandpass. Set "Filter Frequency" to 1000 Hz. You will now hear a very narrow "slice" of the noise centered at 1000 Hz. This is great for creating sci-fi or atmospheric effects.
Pro-Tip: The Lowpass filter is your best friend. 90% of the time, a Lowpass set between 1000 Hz and 4000 Hz will make your background noise more pleasant and less distracting.