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BackgroundMusic
Background Music, a macOS audio utility: automatically pause your music, set individual apps' volumes and record system audio.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Thanks for the comment. I checked out Rogue Amoeba's SoundSource, and BackgroundMusic. I think they're using some sort of virtual audio device or something to intercept applications' audio data, control each application's volume, and then send it to the speakers (or another output device).
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