Table of Contents
Advertisement
2.5 C
HECK COMPUTER SETTINGS
Some simple settings will need to be checked in your computer:
•
The sample rate of your DAC is set to 48 kHz
•
The input gain of the EARS is set to 0 dB. On the Mac, use Audio MIDI Setup. On Windows, use the
Sound control panel and open its Properties dialog. On the Levels tab, right-click to convert the display
to dB and adjust the slider so it reads 0.0 dB.
2.6 S
-
-
: R
TEP
BY
STEP
Room EQ Wizard
(REW) is a free acoustic measurement program that runs on Windows, Mac and Linux. This
section provides step-by-step instructions with screenshots. Here is the documentation.
2.6.1 Calculate SPL calibration target
1) Work out your SPL calibration target. By default, this is −40 for headphones and −30 for IEMs.
a) Open one of your calibration files (e.g. by double-clicking on it). At the top, you will see two lines like
this:
"Sens Factor =-1.7dB, EARS Serial 8601001, compensation HEQ V1"
"Use this file on the LEFT channel. Your sensitive side is LEFT."
Write down the sensitivity factor ("Sens Factor"), and which channel is the "sensitive side." In the
example above, the sensitivity factor is −1.7 and the sensitive side is the left.
b) Add the sensitivity factor to the SPL calibration target. For example, with sensitivity factor of −1.7, the
SPL calibration target is −41.7 for headphones and −31.7 for IEMs.
Note: the calculated SPL calibration target is valid only for REW, and only if the option "Full scale sine rms is 0
dBFS" is unchecked i.e. off:
miniDSP Ltd, Hong Kong /
www.minidsp.com
EQ W
OOM
IZARD
/ Features and specifications subject to change without prior notice
9
Advertisement
Table of Contents
