You've mastered the noise filter, but what about that mysterious "Filter Q" slider? This is an advanced control that unlocks a new level of creative sound design, allowing you to go from simple background noise to complex, evolving atmospheric effects.
What is Filter Q?
In audio terms, "Q" stands for "Quality Factor," but it's easier to think of it as **Resonance**. While the "Filter Frequency" slider sets the cutoff point for your filter, the "Filter Q" slider creates a sharp, resonant **boost** right at that cutoff point.
- A **low Q** value (e.g., 1.0) results in a smooth, gentle filter cutoff.
- A **high Q** value (e.g., 15.0) creates a narrow, sharp peak that sounds like a "whistle" or a focused hum.
Essentially, it lets you emphasize a specific frequency in your noise, making it sound more tonal and less like simple static.
How to Use It: The "Sci-Fi Wind" Technique
The best way to understand Filter Q is to hear it in action, especially when combined with LFO modulation. Let's create a classic sci-fi "sweeping wind" effect.
- In the Generator, turn your "Tone Volume" to 0% so we only hear the noise.
- Set **Noise Type** to **Pink Noise** and turn its volume up to 50%.
- Set **Filter Type** to **Bandpass**. This isolates a narrow frequency band.
- Set **Filter Frequency** to around 500 Hz.
- Now, slowly increase the **Filter Q** slider. As you go past 10, you'll hear the noise transform from a "hiss" into a distinct, whistling tone. Set it to around **15**.
- Finally, let's make it move. Go to the "Modulation (LFO)" panel and enable it.
- Set the LFO **Target** to **Noise Filter Freq (Sweep)**.
- Set the LFO **Frequency** to a slow value, like **0.1 Hz**.
Listen now. You should hear that resonant whistle sweeping slowly up and down, creating a sound reminiscent of wind howling or a futuristic machine. This effect is impossible to create without a high Filter Q.
Filter Q is your key to creative sound sculpting. While a low Q is best for making noise sound "natural," a high Q is for creating unique, dynamic textures. Use it to design your own otherworldly soundscapes for meditation or creative focus.