As of October 2011 — when Avid introduced its advanced AAX (Avid Audio Xtension) plug-in format with Pro Tools 10 to offer better workflows and sound parity when sharing sessions between DSP-accelerated and DSP-based Pro Tools systems — Arturia software instrument users could still run RTAS versions of their precious plug-ins within Pro Tools 10. This is no longer the case with Pro Tools 11.