PRELIMINARY
miniDSP Ltd, Hong Kong /
www.minidsp.com
/ Features and specifications subject to change without prior notice
36
5
A
COUSTIC
M
EASUREMENT FOR
D
IRAC
L
IVE
The
Dirac Live Calibration Tool For miniDSP
uses a set of measurements made in your vehicle to gather all the
acoustical information about your speakers acoustical environment that it needs to calculate the correction
filters.
5.1
O
VERVIEW
A Dirac Live calibration requires a total of nine measurements, with the microphone located in different
positions. Typically, the microphone is pointed vertically (that is, at the roof). The first measurement must be
taken at the center of the listening area, as this location sets the levels and delays of each speaker. Eight more
measurements are then taken at locations spread around the listening area and at different heights.
In a vehicle environment, you can choose different sets of measurement positions in order to optimize for
different situations i.e. with just the driver or with one or more passengers.
Figure 6. Typical measurement setup
