Pure Frequencies Clean sine, any Hz

Pure frequencies are single sine-wave tones played at a precise, unchanging frequency. They're the simplest possible audio signal — no beating, no pulsing, no modulation. Just one tone, held steady, at whatever Hz you choose.

That simplicity is their strength. Pure tones are used in research laboratories, hearing tests, scientific entrainment experiments, and traditional meditation practices where the purity of the sound matters more than entrainment effect. If you want to listen to exactly 432 Hz — or 528 Hz, or 40 Hz — without any beating pattern or combined carriers, pure frequencies are what you need.

Pure tones fill specific needs that beat-based entrainment can't. For chakra meditation practices that associate specific frequencies with specific energy centers, the beat pattern is a distraction — the pure tone is the point. For researchers testing a hypothesis about 40 Hz gamma entrainment, a clean sine wave removes confounding variables. For tinnitus management protocols, precisely matched pure tones are sometimes recommended.

Pure tones are also the closest audio analog to the singing-bowl tradition. A singing bowl played at resonance produces a tone that's close to pure — one dominant frequency with small harmonics. Digital pure tones remove the harmonics entirely, giving you the cleanest possible signal at the frequency you want.

Arkhitec includes 27 presets in the combined solfeggio and pure-frequency category. All nine classical solfeggio frequencies (174, 285, 396, 417, 528, 639, 741, 852, 963 Hz) are available as both clean pure tones and as solfeggio presets layered into soundscapes. Plus pure sine presets at 40 Hz (gamma entrainment research), 432 Hz (alternative tuning), and other research-grade frequencies.

For the cleanest possible signal, use the pure tone presets without layering. For a richer experience, stack a pure tone beneath singing bowls, rain, or ambient audio in the 7-layer mixer. Save the combinations you like as custom presets. Whether you're running a frequency-specific meditation, testing your own response to gamma audio, or just want 528 Hz without any modulation, pure frequencies give you the signal you asked for — nothing more, nothing less.