Nighthawk Tube: Binaural

River.io LLC

In-app purchases

About this app

Nighthawk Tube is a stereo oscillator meditation instrument.

One purchase, forever. No subscription, no account, no ads, and no data collected.

Two audio oscillators — one in each ear — meet inside a glowing vacuum tube rendered entirely in particles. Their waveforms pour across the glass floor, sum into a slowly rotating interference drum, and trace a live Lissajous figure in phosphor blue-green. What you see is exactly what you hear: the beat between the two tones embosses the drum, the figure turns with their phase, and a meditation figure deep in the tube shows which chakras the current frequencies traditionally touch.

TUBE — one base frequency, a balance knob to mix the pair, and a center-detented detune that shifts the left or right oscillator by up to an octave. The readout shows the difference tone and the brainwave band it would entrain: delta, theta, alpha, beta, gamma.

WAVES — morph each side independently from sine through triangle and saw to pulse; the dials wear their waveforms and colors.

PAN — hold the pair where you set it, or flip to ORBIT and let the two tones circle the stereo field in phase with the rotating scope.

TIMER — set a 1, 5, 10, 15 or 30 minute session; the sound fades to silence when time is up.

OUT — a master level knob and a mute switch, so you can drop the instrument to silence without losing your voicing.

The free version plays 1-minute sessions. A single purchase unlocks the full session timer, forever.

Headphones recommended.

What’s new

First Android release. The Nighthawk Tube oscillator-scope instrument, ported from iOS: two-oscillator stereo synth, particle VFD tube, live waterfall traces, interference drum, rotating Lissajous, the ghost meditation figure with its chakra readout, and the session timer.