Mic

Hardware Test page 2 key: 1 (main menu h → [/] to page 2 → 1)

Live oscilloscope waveform + VU meter + gain control. From v1.0.0, TF recording is no longer supported.

Screenshots

Shortcuts

Key	Action
- = or , .	Gain − / +
h	Help (opens Help and mutes the mic; closing Help resumes)

Usage

1. Opening starts the mic and draws the waveform; watch ambient noise and gain to avoid clipping.
2. On exit, Speaker / I2S are released quietly to reduce hum.
3. Recording features are removed; use this App for levels and waveform only.
4. From a Hardware Test child, ESC / GO returns to the Test shelf.