what is valla-amp-modeler-gpu fr?

Valla Amp Modeler GPU is an audio plug-in for musicians and producers who use guitar or bass amp simulations inside their music software. It is an independent tool built on an existing amp modeling technology called NeuralAmpModelerCore, and it is designed specifically to take advantage of Apple Silicon Macs and Apple's Metal graphics technology. The plug-in loads amp profiles in the NAM A2 format along with separate cabinet impulse response files, letting a musician recreate the sound of a specific amp and speaker setup. Its main feature is that it can process the amp simulation using either the computer's regular processor or its graphics processor. Graphics processing is useful in large music projects where the regular processor is already busy handling many other instruments and effects, since it frees up that capacity by shifting the amp modeling work to the graphics chip instead. Regular processor mode, by contrast, reports zero extra delay, which is helpful for live recording and monitoring, though it locks the sound quality to a lighter setting. The README includes real test numbers from a MacBook Pro showing how many simultaneous copies of the plug-in it can run under different settings, along with a suggested workflow: audition sounds in the lighter quality mode, then switch to the higher quality mode using graphics processing for final mixing and rendering. It works as a VST3 plug-in, an Audio Unit plug-in, and a standalone application, and only supports the newer NAM A2 model format, not older amp profile formats.