In Settings > Audio , increase the audio buffer size to 480 samples. Version 24.0.0.72 fixed the core issue, but high CPU usage can still cause drift.
vMix Pro 24.0.0.72 is a high-performance live production and streaming software designed for Windows, enabling users to create professional-quality broadcasts from a single computer. This specific version represents a mature iteration of the platform, offering a "Multilingual" interface and optimized x64 architecture to handle complex, high-resolution workflows including 4K. The Architecture of vMix Pro Vmix Pro 24.0.0.72 -x64- Multilingual