PRELIMINARY
miniDSP Ltd, Hong Kong /
www.minidsp.com
/ Features and specifications subject to change without prior notice
73
9.4
A
COUSTIC MEASUREMENT SETUP FOR
REW
To obtain most accurate setup for active speakers and subwoofer crossovers, acoustic measurement will be
required. You can use any program you like, but the freeware REW (Room EQ Wizard) is a good choice.
This diagram illustrates the connection. An analog output from the computer is connected to the relevant input
of the C-DSP 8x12 DL. The output can a headphone or line output, or via a USB soundcard. The UMIK-1 is
configured as the inputs source in REW, so that the output corresponding to the connected input can be
measured.
REW generates a test signal that plays through the system and each speaker in turn. This program uses a swept-
sine wave technique, which is a signal that starts at low frequencies and gets higher in frequency over the
course of a few seconds. After playing the signal and recording the resulting audio, REW analyzes the captured
signal and displays a frequency response plot as shown above. It is also capable of many other types of analysis
that you can use to optimize your audio or home theater system.
To set up your computer to use Room EQ Wizard and a UMIK-1, use one of the following application notes:
•
Using the UMIK-1 and REW with HDMI output - Windows
•
Using the UMIK-1 and REW with HDMI output - Mac
To learn more about how to analyse and understand the results of your measurements, see:
•
Acoustic measurement with the UMIK-1 and REW
