48 lines
1.6 KiB
Markdown
48 lines
1.6 KiB
Markdown
# terminal-oscilloscope
|
|
|
|
A terminal-based oscilloscope with CRT phosphor physics, written in Nim using [illwill](https://github.com/johnnovak/illwill).
|
|
|
|
|
|
|
|
## Features
|
|
|
|
- **CRT boot/shutdown animations** — phosphor ramp, beam sweep, vertical collapse, dot fade
|
|
- **Y-T and X-Y modes** — time-domain waveform or Lissajous figures
|
|
- **Phosphor persistence** — beam bloom, decay trails, intensity-based shading
|
|
- **Half-block rendering** — 2x vertical resolution using Unicode `▀▄█` characters
|
|
- **Live audio capture** — visualises system audio via ffmpeg/PulseAudio monitor
|
|
- **Demo mode** — built-in synthesised waveforms when no audio source is available
|
|
|
|
## Install
|
|
|
|
Requires [Nim](https://nim-lang.org/) 2.x.
|
|
|
|
```bash
|
|
git clone https://github.com/rolandnsharp/terminal-oscilloscope.git
|
|
cd terminal-oscilloscope
|
|
nimble build
|
|
./crt
|
|
```
|
|
|
|
## Controls
|
|
|
|
| Key | Action |
|
|
|-----|--------|
|
|
| `m` | Toggle Y-T / X-Y mode |
|
|
| `+` / `-` | Increase / decrease gain (amplitude) |
|
|
| `]` / `[` | Zoom in / out time axis |
|
|
| `g` | Cycle grid: full → crosshair → off |
|
|
| `space` | Freeze display |
|
|
| `d` | Cycle demo frequency presets |
|
|
| `q` | Quit (with CRT shutdown effect) |
|
|
|
|
## Audio
|
|
|
|
Captures system audio automatically using `ffmpeg` with the PulseAudio/PipeWire monitor of your default output sink. Falls back to `parec` if available, or a built-in demo signal.
|
|
|
|
No extra packages needed — just `ffmpeg` (pre-installed on most Linux systems).
|
|
|
|
## Credits
|
|
|
|
CRT turn-on/off animations inspired by [AetherTune](https://github.com/nevermore23274/AetherTune).
|