One of the reasons veteran DAW designers Wolfgang Kundrus and Matthias Juwan jumped at the chance to create a new program was because they could totally start fresh, instead of having to deal with old code that wasn’t compatible with a next-generation audio engine.
For Studio One, they designed a highly optimized and streamlined codebase that makes minimal demands on your CPU. Studio One Pro’s 64-bit, double-precision, floating-point audio engine produces fidelity that is equal to or better than that of the other leading DAWs. And with the ability to automatically switch between 64- and 32-bit operation on the fly, Studio One Pro can accommodate any combination of 32- and 64-bit plug-ins and still maintain the best possible sound quality. Studio One Artist uses a 32-bit version of the same engine and provides sound quality that is very nearly the equal of its 64-bit sibling.
Real-time auto/manual time-stretching and resampling capabilities are seamlessly integrated. You don’t see them, you just use them.