The library can be used since .NET 4.0 or .NET Standard 1.3. It's also CLS compliant to allow use in VB.NET. The Rationals library is an alternative to BigRational found in BCL. Its implementation is ...
Even with REAL, the osu's playback latency is still about 25ms. Anyway this is the easiest way to gain such improvement. Tools like osu-External-ASIO-Sound or AsioHookForOsu gives ASIO support, but ...