HT-BD1250 connected to A/V amplifier

Hi!

I have a chance of getting the BD1250 - only the main unit, without speakers.
I was wondering if it will be possible to output HD digital audio (Dolby HD or DTS HD) through HDMI to the A/V amplifier (Yamaha RX-V765)?
I have read in the manual that the sound can be transmitted over the HDMI (when connected to a TV), but it also says that the HDMI Audio is automatically down-mixed to 2ch for TV speakers. Is it downmixed by the TV or internally by the BD1250?

I want to get the full HD audio information transmitted to the A/V amplifier, not a downmixed one.

Any info will be much appreciated.

Thanks!

Regards,

Alex