Cambridge Audio 540d v2 Manuale Utente

14

Dolby Digital Setup menus

When the Dolby Digital setup menu is selected, use the 

and 

arrows to move to the desired menu. Use the Navigation arrows

(

) to adjust the settings and press the Enter button to confirm

your selection.

Dynamic

Dolby Digital encoded discs allow for the dynamic range (the difference

between loud and quiet passages) to be compressed (i.e. for late night

listening). The options are:

Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Off

When ‘Full’ is selected, the peak-to-peak value of the audio signal is

compressed by the maximum amount. When ‘Off’ is selected, no

compression is applied.

Channel Delay

For best surround-sound effects it is desirable to adjust the channel

delay so that sounds from each speaker arrive at the listener at the

same time. This is done by measuring the distance from the listening

position to the Left or Right Front speaker (which should be equidistant

from the listener), distance from the listening position to the Centre

Speaker and similarly to the Right Rear Speaker, Left Rear Speaker and

Subwoofer. See diagram below:

The measurements are not too critical so do not worry if your front

speakers are slightly asymmetric or about making very precise

measurements (+/- a foot or 30cm or so is fine).

The  channel  delay  to  be  entered  for  each  speaker  is  then  the  difference

between   the   distance   to   the   Front   Speakers   and   the   speaker   to   be

configured.

So for instance if the Front Speakers are 5 ½ feet from the listener and

the Centre speaker 3 feet from the listener the channel delay to be

entered for the Centre Speaker is 2 ½  feet. Similarly if the Right Rear

Surround is 3 ½  feet from the listener the channel delay would  then be

2 feet.

Note:   The distance between the surround speakers and the listener

must be shorter than or equal to that between the front speakers and

the listener.

The units are feet for units sold in North America / Canada and metres

for units sold in Europe / Australasia.

Use 

to select each speaker in turn and 

 

to enter a distance

value.

The 540D V2 uses this to calculate and use the correct delay time for each

channel so that each channel reaches the listener at the same moment.

HDMI Audio

Two  options  are  available  PCM  Stereo  and  Follow  SPDIF.

When HDMI Audio is set to PCM stereo the HDMI output will be 16/44.1

for CDs and 16/48 or 16/96 stereo/stereo downmix for DVD depending

on the soundtrack bit depth.

When the 540D V2 is connected directly to a TV set able to receive

Stereo Audio over HDMI PCM Stereo is the best setting to use. Your TV

set will now always receive a two channel downmix from CDs or DVDs.

When HDMI Audio is set to Follow SPDIF the HDMI output will exactly

follow the SPDIF output as per the previous section and table.

When the 540D V2 is connected to an AV receiver by HDMI there are two

possibilities depending whether the receiver accepts HDMI audio

directly or switches HDMI video and uses SPDIF for digtial audio

reception:

1. For AV receivers that can receive HDMI audio set the HDMI Output to

Follow SPDIF. Now set the SPDIF Output to RAW/Bitstream. The AV

Receiver can now decode the bitstream over HDMI into whichever

formats it supports. The TV itself will normally now not receive any

audio (unless the receiver has the capability of making a stereo

downmix and outputting it over HDMI).

2. For AV receivers that switch HDMI and use SPDIF for audio reception

(such as our own Azur 540R V3 and 640R) set the HDMI output to

PCM Stereo and SPDIF Output to RAW/Bitstream. The AV receiver

now receives and decodes surround-sound via the SPDIF connection.

The TV will always also receive a two channel downmix directly from

the DVD player over HDMI which can be used if desired.

Pro Logic II

The 540D V2 can decode Stereo soundtracks (that have been suitably

encoded) into 5 channel surround-sound using Dolby Pro Logic II. Two

modes are available (Music and Movie), optimised for the different

Programme types.

To use Pro Logic II first turn it On and then select either Movie or Music

mode depending on the programme type.

Note: Enabling Pro Logic II decoding disables Dolby Digital decoding as

Pro Logic is used instead as you’d expect.

Audio Setup menu continued

1

2

4

3

1 = Front Left & Right speakers

2 = Centre speaker

3 = Surround Left speaker

4 = Surround Right speaker

5 = Subwoofer

5