Stopwatch with Sound Trigger

A dark-themed desktop stopwatch built with PySide6, replicating sqrt.ch/Buch/stopwatch. Supports manual start/stop/reset plus an optional microphone-triggered start/stop (e.g. clap or noise detection).

Features

• Start / Stop / Reset with millisecond display (HH:MM:SS.mmm)
• Keyboard shortcuts: Enter = Start/Stop, Esc = Reset
• Session log with timestamped entries, Select and Clear buttons
• Optional mic-trigger mode: loud sound toggles the stopwatch, with adjustable threshold and cooldown
• Device selector with refresh button for microphone input
• WASAPI exclusive-mode audio on Windows when available, with automatic fallback to shared mode

Requirements

• Python 3.9+
• See requirements.txt. The mic-trigger feature is optional — the app runs without sounddevice/numpy, just without that feature.

Installation

pip install -r requirements.txt

Usage

python stopwatch.py

Notes

• Device list refresh forces a PortAudio re-initialization (using sounddevice's private _terminate()/_initialize()), since PortAudio caches devices at first query and won't otherwise notice hardware changes (e.g. unplugging a mic).
• Tested primarily on Windows with WASAPI; shared-mode fallback should work cross-platform.

License

MIT License – More Information you find here LICENSE.