About ASIO buffer size, and I'm sure you know this, bigger is sometimes better but much bigger can be much worse. There is always a sweet spot for ASIO. In fact, there can be a sweet spot for buffer size during playback, but a larger one for mixing or recording. 1538 sounds well too high, but I don't know your soundcard's performance.
BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.
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