miniDSP Ltd, Hong Kong /
www.minidsp.com
/ Features and specifications subject to change without prior notice
23
The time delay corresponds to a distance. This distance is shown in cm when the cursor is hovered over the time
delay box. The maximum time delay of 80 ms corresponds to a distance of approximately 27.5 meters (about 90
feet).
Time delay can be calculated from distance using one of the following formulae:
(Time delay in ms) = (Distance in cm) / 34.4
Or:
(Time delay in ms) = (Distance in inches) / 13.54
3.4.7
Invert and mute
Each channel can be inverted in polarity, and individually muted. When either of these options is selected, the
display changes color and the label of the button reflects the current state.
3.5
B
ASS MANAGEMENT
When movies are mixed for the cinema, each speaker is specified as a full bandwidth channel—that is, 20 Hz to
20 kHz, although 40 Hz to 18 kHz for the speakers is considered acceptable in cinema and the mixing studio (see
the Grammy paper “
Recommendations For Surround Sound Production
”). The Low Frequency Effects (LFE)
channel is used for additional low-frequency content and is fed to dedicated subwoofers in order to avoid
overloading the speakers with high-energy low-frequency content.
In a typical home theater, some or all of the speakers are not capable of reproducing frequencies down to 40 Hz,
let alone 20 Hz. Even if using hifi speakers with a specified low frequency roll off of 40 Hz, they may not be
capable of producing this frequency at the volume required for home theater.
The solution is
bass management
, where low frequencies are filtered out from the speaker channels and sent to
the subwoofer instead. While 80 Hz is a common frequency used to separate content for the subwoofer and
speaker channels, the nanoAVR with bass management allows any frequency to be used, and any mix of
frequencies to be used across different channels.
The
nanoAVR_BM
plugin contains an additional screen, named
LFE Mgt
:
