Functionality:

• it stores the recorded audio without asking where to save (desktop -> WhatDidISay -> recorded_*.wav)
• not only inputs but also the system audio output can be selected to be recorded
• next to clicking on the tray icon, a keyboard shortcut can be also used to trigger saving

Under the hood:

• .NET framework is updated to 4.8
• dependencies are updated to the latest versions
• a little bit of thread safety
• it seems that global hotkey doesn't work if the program is not visible in taskbar

All the below description is from the original repository

This software records n minutes of audio in the background without saving it on disk, so you can run it 24/7 without ruining your hard drive or SSD. Once you ask yourself "What did I say?", you can save the last n minutes to disk.

This software was requested on Software Recommendations but none of the answers were really suitable, so I thought I need to create it.

• Windows
• .NET framework 4.5

• -s: Sample rate. Default: 44.1 kHz (CD quality)
• -b: Bits. Default: 16 bit resolution (CD quality)
• -c: Channels. Default: 2 channels (stereo)
• -t: Buffer time. Default: 5 minutes

• CommandLineParser
• NAudio

• no integrated playback. Just saving as WAV is possible at the moment.
• no support for MP3 due to licensing issues.
• some options only available via command line, not via user interface (e.g. sample rate, bits per sample, channels)
• check the list of known issues
• not a commercial application, do not expect the best support