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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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Silk.NET
The high-speed OpenGL, OpenCL, OpenAL, OpenXR, GLFW, SDL, Vulkan, Assimp, WebGPU, and DirectX bindings library your mother warned you about.
You can always try LibVLCSharp. I don't know if it will give you all that you need but it is cross platform and can be integrated into an Avalonia project.
Not tried it but there is also NAudio (https://github.com/naudio/NAudio)
To check out an implemented solution of this you can browse https://github.com/tanjera/infirmary-integrated
NOTE:
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Hence, a higher number means a more popular project.