In the Preset Manager of our Generator, you'll find a long list of presets under the "Yuumi's Frequency Guide" category. These aren't just random settings; each one is a carefully designed soundscape built for a specific purpose, combining the science of brainwave entrainment with the art of sound design. Let's take a look at the philosophy behind a few of them.

Preset: "Blissful Sleep (Delta)"

• The Core: This preset uses a very slow **3.9 Hz Delta beat**. This frequency is deep in the Delta range, perfect for encouraging the brain to enter a state of restorative, dreamless sleep.
• The Ambience: The carrier is a warm **432 Hz**, and it's paired with deep **Brown Noise**. The noise is filtered with a steep Lowpass filter, removing all "hiss" and leaving only a gentle, womb-like rumble.
• The Movement: A very slow LFO gently modulates the noise volume, creating a subtle "breathing" effect that is deeply soothing and hypnotic.
• The Goal: To create a sound environment that is profoundly relaxing, non-distracting, and effective at masking external noises to help you fall and stay asleep.

Preset: "Zen Focus (Alpha)"

• The Core: This preset is built around a **10.0 Hz Alpha beat**, the classic frequency for achieving a "flow state" of relaxed, alert focus.
• The Ambience: It uses **Pink Noise**, which is more balanced than Brown or White noise, making it ideal for concentration. The filter is set to gently roll off the highest frequencies, making it easy on the ears for long study sessions.
• The Movement: There is very little movement in this preset by design. For deep focus, a steady, unchanging sound is often best, as it's easier for the conscious mind to ignore.
• The Goal: To provide a stable, predictable, and effective audio backdrop that filters out distractions and neurologically supports a state of sustained concentration.

Preset: "Spiritual Awakening (Theta)"

• The Core: This preset uses a **7.5 Hz Theta beat**. This frequency is on the Alpha-Theta border, associated with deep meditation, intuition, and creative insight.
• The Ambience: The carrier is a high **852 Hz** Solfeggio frequency, chosen for its spiritual association with "awakening intuition." The noise is filtered with a Bandpass filter to give it a more focused, "tonal" quality.
• The Movement: This preset makes heavy use of effects. A slow LFO gently modulates the carrier frequency (vibrato), while **Reverb** and **Delay** are used to create a vast, ethereal, and otherworldly space.
• The Goal: To create a soundscape that is not just relaxing, but actively encourages an expansive, introspective, and spiritual state of mind, perfect for deep meditation or journaling.

These presets are designed to be powerful starting points. We encourage you to load them up, see how they are built, and then tweak them to your own liking. Change the LFO speed, adjust the filter, or try a different carrier. Use them as templates to build your own perfect sound.