I received my copy of Rocksmith and guitar today!
Inside, I noticed there was a little flyer about dealing with lag, which I thought was important enough to share. Click through for a larger, more readable version:
Before setting up the game, you should first follow these steps to ensure your HDTV system is optimized for Rocksmith:
- Follow the Display Lag Correction instructions found in the in-game manual.
- Make sure your console is set to match your TV’s native resolution (1080p, 720p, etc.) and your TV is set to match your console’s native resolution.
- If your TV has a PC or Game mode, select it. For more information, check your TV’s manual.
- If your TV does not have a PC or Game mode, access your TV’s Options menu, disable image scaling, and turn off all processing effects. (This is effectively what “Game mode” or “PC mode” does.)
We never recommend using HDMI as your primary sound source. If you are experiencing lag and are using HDMI for audio, try switching to Component cables. Alternately, you can use the appropriate Audio Adapter Cable for your console with an external audio source like speakers, headphones, stereo, or home theater system. If HDMI is your primary sound source, we recommend that you do not use your TV’s speakers for sound.
Note that for best results, you need to have discrete audio and video outputs from your console — and the worst results are from a combined input to a single television.
I thought you could also use a Y-splitter on the 1/4″ guitar output — routing one side to a real guitar amplifier, and the other side to the Rocksmith USB adapter and your console. However, it appears you need a true powered / buffered signal splitter device for this to work, and those are not cheap…