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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.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
I'm sure there are standalone Lua libraries for playing audio files in the background. A quick Internet search gave https://github.com/TheLinx/lao.
Finally, (self plug) I make a Lua terminal program, CraftOS-PC, that has an API for audio playback built-in, as well as a very robust library for audio loading, generation, modification & playback, and even a sound generator plugin to handle tones for you, so if all you want to do is play around with learning how low-level audio generation and mixing works, I highly recommend it - working on this stuff taught me everything I've learned about the mechanics of sound.
Finally, (self plug) I make a Lua terminal program, CraftOS-PC, that has an API for audio playback built-in, as well as a very robust library for audio loading, generation, modification & playback, and even a sound generator plugin to handle tones for you, so if all you want to do is play around with learning how low-level audio generation and mixing works, I highly recommend it - working on this stuff taught me everything I've learned about the mechanics of sound.
Finally, (self plug) I make a Lua terminal program, CraftOS-PC, that has an API for audio playback built-in, as well as a very robust library for audio loading, generation, modification & playback, and even a sound generator plugin to handle tones for you, so if all you want to do is play around with learning how low-level audio generation and mixing works, I highly recommend it - working on this stuff taught me everything I've learned about the mechanics of sound.