hello, the answer to your question is yes. both the HDMI and the digital optical connectors carry 5.1 provided they are connected directly to a suitable surround sound amplifier. if there connected directly to a tv for example it is sent as 2 channel stereo with dolby surround effects. below is an extract from the manual showing the different audio settings. pete. dolby settings Downmix Allows you to select the output audio type. Select the setting that best suites your equipment. The following options are available: 1. Automatic <default>. This is the best option to select if connecting to an audio device using a HDMI cable. - Your audio device will be interrogated over the HDMI cable to find the best quality sound supported by your TV/Amplifier. If Dolby Digital 5.1 is supported, then this will be sent over HDMI, otherwise 2-channel PCM Stereo (with Dolby Surround) will be sent. - The optical output (SPDIF) will carry 2-channel PCM Stereo (with Dolby Surround). - The SCART will carry Stereo (with Dolby Surround). 2. Dolby Digital. Select this option if connecting to a Dolby Digital compatible TV/Amplifier, using a digital optical lead (SPDIF). - The optical output (SPDIF) will send Dolby Digital 5.1 (if supported). - The HDMI will carry Dolby Digital 5.1 if supported, otherwise it will carry 2-channel PCM Stereo (with Dolby Surround). - The SCART will carry Stereo (with Dolby Surround). 3. Dolby Surround. Select this option if connecting to a TV/Amplifier that supports Dolby Surround Pro Logic, Dolby Pro Logic II, Dolby Pro Logic IIx or Dolby Pro Logic IIz decode. - All outputs will carry Stereo (with Dolby Surround). 4. Stereo. Select this mode if connecting to a Stereo audio device. - All outputs will carry Stereo (without Dolby Surround). Audio Delay Allows you to delay the audio timing so that it synchronises with the TV picture. This allows for delays that may be introduced by some TVs. Dynamic Range Control The following options are available: 1. Off mode <default>. The sound output is as is intended by the programme being watched. 2. TV mode. Default values of Cut and Boost are selected to both reduce high volume and increase low volume sound, relative to the main sound volume through your TV. 3. On mode. Allows Cut and Boost values to be changed. Cut: Allows you to reduce high volume sounds such as explosions, relative to the main sound volume. The maximum reduction is 100. Boost: Allows you to increase low volume sounds such as speech or background sounds, relative to the main sound volume. The maximum increase is 100. Note: These settings are only effective if supported by the broadcaster. ** To leave the list, click on the immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=unsubscribe] ** If this link doesn't work then send a message to: ** access-uk-request@xxxxxxxxxxxxx ** and in the Subject line type ** unsubscribe ** For other list commands such as vacation mode, click on the ** immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=faq] ** or send a message, to ** access-uk-request@xxxxxxxxxxxxx with the Subject:- faq