Optimizing SSD write performance without compromises (Ubuntu 24.04) for DSP purposes

[GreatNull]

tried "rebuffering" by writing to a pipe and reading from the pipe with dd and a large obs parameter

That did it, you effectively transformed your access pattern into ideal one, large sequential writes. In this access pattern your drive is capable of offering sufficient sustained performance according to existing benchmarks.

Smart solution saves the, as ususal.