Cambridge Audio Azur 540R V3 - Manual (Page 13)

540R v3 azur
13
ENGLISH
Setting each speaker allows the 540R v3 to perform what is called Bass
Management and to direct low frequency bass from music and the Low
Frequency Effects channel of surround sound material to those
speakers best able to reproduce it. If you do not wish to use any of the
speakers change it’s setting to ‘None’.
The Subwoofer output can also be set to ‘Yes’ or ‘No’. If no sub is being
used make sure this setting is set to ‘No’ to allow the 540R v3 to re-
direct the bass information in this channel to other speakers.
Note: The 540R v3 will force some speakers to certain settings in some
of the following circumstances!
The Front Left and Right speakers may be ‘Large’ or ‘Small’ but never
‘None’ as they are always required for any type of music/movie
reproduction.
Bass must always be reproduced by either the Front Left and Right or
Subwoofer channel (or both). The 540R v3 will thus not allow a
combination of ‘Small’ front speakers and no subwoofer.
If the Front Left and Right cannot reproduce low frequency bass a
Subwoofer must be used i.e. If the Front Left and Right are set as ‘Small’
the Sub must be Set to ‘Yes’.
Also, setting the Front Left and Right as ‘Small’ will always set the other
speakers as ‘Small’ (and the Sub to ‘Yes’). This is because LFE/ bass
information should not be redirected to the surround channels.
To store the setting simply come back out of the OSD (pressing the OSD
button always moves back one menu item, and then exits and stores
from the main menu screen).
Because the speakers in a surround sound system are usually different
distances from the listener the 540R v3 incorporates the ability to apply
a variable digital delay to each of the channels so that the sound from
each arrives at the same time at the listening position for best surround-
sound effect. Each pair of speakers (i.e. Front Left and Right or Surround
Left and Right) are subject to the same delay and so must be situated
equidistant from the listener.
To set the delay times simply measure the distances from the listening
position to each speaker as shown in the following diagram:
Note: No delay setting for the subwoofer is necessary.
Set the distances in the OSD Speaker Delay menu to the nearest value
in metres (1 foot = 0.3 metres). The speed of sound is approx 340
metres per second, the 540R v3 thus introduces approx 3mS of delay
per metre of distance set.
Go to the ‘Speaker Delay Menu’ and highlight each speaker in turn. Set
the distance to the nearest value to that which you measured by using
the Left and Right arrows (the values do not need to be exact):
Press the OSD button to exit the menu.
Note: In addition to the delays as set above Dolby Pro Logic II playback
also requires an extra 15 milliseconds delay to the surround channels
only. This extra delay is part of the Dolby Pro Logic II specification and
ensures that sound from the surrounds arrives just after sound from the
front reducing the audibility of sound leakage from the front to the
surround speakers. Because the relationship between the Dolby Digital
and Dolby Pro Logic II two delays is fixed (15mS extra to the surround
channels), it is only necessary to set the delay by measuring the
distances as we have described. The 540R v3 will automatically provide
the appropriate extra delay whenever you switch to a Pro Logic Mode.
1
2
4
3
1 = Front Left & Right
speakers
2 = Centre speaker
3 = Surround Left & Right
speakers
4 = Surround Back speaker
(when used)
2. Speaker delay
Speaker Delay Menu
FL/R : 30mS/10.20m
C : 30mS/10.20m
SL/R : 25mS/ 8.50m
BS : 25mS/ 8.50m
[UNIT : mS/meters]
Return to Menu : [OSD]