Select your Teensy USB Audio or audio interface input, or share computer audio. Audio is analyzed locally, without recording or speaker monitoring.
For YouTube, select its browser tab and enable “Share tab audio”. For PC audio, select Entire Screen and enable “Share system audio”, if offered. Screen sharing permission is required; PHOSPHOR only analyzes the audio and does not display, record, or upload your screen.
Direct USB: configure the Teensy with a USB type that includes Audio, and route your sketch’s signal to an AudioOutputUSB object. Alternatively, connect its audio output to a USB audio interface and select that interface here.
Computer audio: click Computer audio, choose a browser tab (such as YouTube), and enable Share tab audio. To capture PC audio, select Entire Screen and enable Share system audio when available. Audio-sharing options depend on your browser and operating system. The screen capture remains active until you stop sharing; no screen content is displayed, recorded, or uploaded.
OBS: use Window Capture with this page open in Chrome or Edge. To receive an OBS mix, configure a virtual audio input on your system; OBS Virtual Camera does not transmit audio.
Modes: WAVE displays the time-domain signal; XY uses left/right channels (a mono source produces a diagonal line). ORBIT and RIBBON transform the signal. MORPH gradually blends their geometries. FFT shows the relative spectrum without calibration.
Color & FX: select the rainbow swatch for multiple simultaneous hues along the curve. Drift cycles the whole curve through a single hue at a time. Color Speed controls the pace; selecting a solid color locks that hue. Drag the FX knob up/down, or use arrow keys, to blend layered elemental particles, frequency halos, tonal constellations and transient bursts. Each geometry has its own particle motion and forms. The engine responds to frequency bands, spectral note peaks, brightness, noise and attacks; it does not identify instruments. At zero, FX is off.
F: fullscreen · H: hide controls · Space: freeze the display. The demo is silent. This visual laboratory is not a calibrated measuring instrument.