I have more questions:
Is there any "stereo" mode for Audyssey?
Is it even geared towards stereo listening? OR will it just try to simulate surround sound if you calibrate with just 2 front speakers?
What would be the benefit of an Audyssey tuning on stereo? What are one's expectation when using Audyssey for stereo listening?
Are you looking for "balance" of volume between left/ right speakers?
After running the Audyssey in 5.1 Mode, Select Stereo while listening to Music. Then Turn On the Audyssey. Tone Controls will be turned off automatically.
If you want to do Audyssey Setup for 2 Channels, you should be able to achieve it.
1. Manually select your Center, Surrounds and Sub Woofer Speakers as None in speaker Setup.
2. Then you can Run Audyssey.
3. This way AVR should only calibrate 2 speakers.
4. If you want to Bi-Amp your Speakers, Bi-Amp your speakers. Manually Set Amp to Bi-Amp and then Select Bi-Amp while running Audyssey.
I have personally done this with SR5005 with 4.0 setup (2 Fronts, 2 Srrounds). While running Audyssey, it only showed 4 Speakers since I had selected Center and Sub as None.
Only Disadvantage I see is when you wanna watch movies, you will have again set Center, Surrounds as Small / Large and Sub Speakers as Yes and Audyseey wont work that time since you are changing your setup from 2.0 to 5.1 and it requires re-running of Audyssey Setup.