Audiovisual
The game outputs analog 2ch sound to the AV Multi out but allows Dolby Digital 5.1ch with the S/PDIF out and LPCM 5.1ch with the HDMI out.
In terms of visual quality, the game options allow the selection of 720p and 1080p HD resolutions as well as "system settings default". Version 1.0~1.2 allows 480i/p NTSC resolution, while the 2.0 version is made for 576i/p PAL resolution.
Read more about this topic: Gran Turismo HD Concept, Overview