ACE-Step Studio 3.8.3

Every engine runs on any x86-64 processor, with or without AVX2. The vocal separator (BSRoformer.cpp), recognition for karaoke (transcribe.cpp), the audio.cpp server, and the HOT-Step tools (the MIDI transcriber, the trainer and the style captioner) now ship a processor build for every instruction level and load the one this processor runs best, instead of the AVX2 build alone; earlier versions could refuse or crash on a processor without AVX2. The new builds are downloaded once after the update.

The ACE-Step engine (CUDA 13, CUDA 12.9, Vulkan, the processor), the CUDA runtime and the other paths are unchanged. The Linux .deb and AppImage are built on Ubuntu 22.04.