A 0.5 Hz binaural rate at the floor of the delta band, used for the deepest night listening.
Limited research
Frequency Library
Every entry below is a sound experience. Frequencies are described using traditional, cultural and evidence-aware language — never as medical treatment.
Brainwave Range 0.5–14 Hz
Delta, theta and alpha rates. These are far below the range a speaker can reproduce, so GSS plays them as binaural beats — a 200 Hz carrier in one ear and a slightly offset tone in the other. Headphones are required.
A 0.5–4 Hz binaural rate traditionally paired with deep-sleep and night listening.
Limited research
A 4–8 Hz binaural rate commonly used for meditation and drifting states.
Limited research
An 8–14 Hz binaural rate often chosen for relaxed, alert focus.
Limited research
Low Frequencies 50–100 Hz
Deep, felt-more-than-heard tones often used as a grounding bed underneath other sound layers.
A very low, felt-more-than-heard hum used as a grounding bed.
Established audio/sound principle
A smooth low tone often chosen for quiet, steady background listening.
Established audio/sound principle
A warm low tone that reads slightly more present than 50–60 Hz.
Established audio/sound principle
A clearly audible low tone suited to grounding and breathing practice.
Traditional practice
A low tone quiet enough to sit under work or study without pulling focus.
Limited research
The top of the low band — clear, present, still deep.
Established audio/sound principle
Balanced / Foundational 111–444 Hz
Mid-range tones commonly used as the base note of relaxation, reflection and focus sessions.
A low-mid tone popular in sound-bath and tuning-fork work.
Traditional practice
A low-mid Solfeggio tone commonly used as a steady foundation for sound-bath sessions.
Traditional practice
A warm mid tone often used as a quiet, unobtrusive base for reflection and breathwork.
Traditional practice
A warm Solfeggio-family tone used in reflective and restorative sound practices.
Traditional practice
A warm mid tone associated in modern spiritual numerology with alignment and protection.
Traditional practice
A mid tone widely used in reflective and intention-setting practices.
Traditional practice
A bright, uncluttered mid tone often paired with study sessions.
Limited research
A solfeggio-family tone commonly used for grounding and letting go.
Traditional practice
A grounded mid tone that sits just below standard concert pitch.
Anecdotal / exploratory
A classic Solfeggio tone traditionally associated with change, renewal and fresh starts.
Traditional practice
The most widely requested GSS tone — the default base for calm sessions.
Limited research
A clear mid tone four hertz above standard concert A (440 Hz) — a bright, stable base.
Anecdotal / exploratory
Meditation / Spiritual Traditions 528–1111 Hz
Tones that appear widely in meditation, sound-bath and spiritual traditions.
A bright meditation tone frequently paired above 432 Hz.
Traditional practice
A high, shimmering tone for short, attentive sittings.
Anecdotal / exploratory
A bright Solfeggio tone traditionally used in practices centered on connection and harmony.
Traditional practice
A crisp Solfeggio tone traditionally associated with clarity and self-expression.
Traditional practice
A classic Solfeggio tone traditionally associated with awakening intuition and inner knowing.
Traditional practice
A bright upper tone used sparingly as a shimmer over a lower base.
Not established as medical treatment
The brightest GSS seed tone — best used sparingly as an accent.
Not established as medical treatment
A bright, airy tone used in Solfeggio practice as a closing or 'crown' pitch.
Traditional practice
The highest GSS seed tone — a brief, very bright accent.
Not established as medical treatment