User guide

DSP presets
48
THX Surround EX and Meridian EZ can also be used with non-
encoded material, and often give a good effect depending on
the soundtrack.
5.1 Movie DSP preset parameters
Parameter Options What it changes
Surr. Rear Surr. Rear Switches the surround signal
Surr.Side between the side and rear
Surr. All speakers.
LFE 0 to -30dB The relative level of the LFE
bass channel.
Max SPL * 105 to 120dB The peak-level limit for an LFE
SPL subwoofer.
Limit * -15 to -5dBFS The peak-level limit of the total
bass signal added to the main
speakers.
Compress † Off, Low, Med, The dynamic range control; see
Top, Max, Mix opposite.
* See Using peak-level limiting, page 49.
† Dolby Digital and Dolby Digital THX only.
Using dynamic range control
Because Dolby Digital is a digital format it allows dynamic range
control without the distortion involved in analogue methods. The
Compress parameter can be set to one of the following options:
Option Description
Compress off No compression.
Quiet boost Moderate bottom-up compression. This raises
quiet sounds above the background noise,
which is ideal for demonstration and quiet
listening.
Compress Moderate amounts of both bottom-up and top-
med down compression.
Loud cut A moderate amount of top-down compression.
This reduces loud sounds.
Compress Full bottom-up and top-down compression.
max Quiet sounds are raised to be audible and loud
passages are minimised to avoid disturbance,
which is useful for late-night listening.
Compress Bypasses dialogue normalisation and
mix references the sound pressure level in the studio
where the material was mixed.