Dirac Live - Bryston SP4 Owner's Manual

than what is going to the main theater. Zones have
all the same features of a main theater except that
channels are always "large", they cannot include
subwoofer channels, and they are limited to mono
or stereo. In order to control a zone, it must be
included in the preset that is currently selected in
the remote control. See "Presets" on page 28 for
more details.

Dirac Live

Dirac Live is a highly advanced calibration tool
which uses sophisticated mixed-phase filters to
compensate for loudspeaker and room deficiencies
in order to provide optimal acoustic performance
of your theater. Though all SP4s are compatible
with the Dirac Live Calibration Tool, it is an optional
purchase. The software license and calibration kit
are usually purchased by the installer, however,
they are available for purchase by the end user as
well. If you have not purchased the license and/or
calibration kit and would like to do so, please speak
with your Bryston dealer or with Bryston directly.
All Theaters, zones, and child theaters can be
calibrated with Dirac Live. Presuming you have a
license and calibration kit, prepare your SP4 for
calibration by following the steps below.
1. Define Speakers
For each theater or zone you will calibrate
using Dirac Live, ensure that you have correctly
defined each speaker's Size/Filter, Frequency
and Slope, multi-way speaker definitions and
other Bass Mangement parameters. ("Individual
Channel Adjustments" on page 17)
2. Download and install Dirac Live
Calibration Tool Software
You can download a Mac or PC version of
the software at http://support.bryston.com/
downloads/SP4
Even if you own a Dirac Live license for another
branded product, it will not work for the SP4.
Only the StormAudio/Bryston branded version
SP4 Immersive Surround Processor
of the software available from Bryston is
compatible.
Install the software on the laptop you will use to
calibrate the SP4. Enter the e-mail you used to
license the software and your password. Note
that the laptop will need to be connected to the
internet to validate your license.
3. Prepare Calibration Hardware
Although we recommend using the kit we
provide which includes the UMIK-1 USB
microphone, other hardware may be compatible
with the Dirac Live Calibration Tool. This guide
will only cover our hardware.
Connect the UMIK-1 to your laptop. Note the
serial number on the microphone. Navigate to
https://www.minidsp.com/products/acoustic-
measurement/umik-1. Enter the serial number
to obtain your unique calibration files.
4. Choose Theater or Zone to Calibrate
From the Main Speakers (A) menu
in the SP4 web UI, EDIT (B) the
theater or zone you wish to calibrate.
5. Select Base Profile
Select the profile which will serve as the
basis for your Dirac Live calibration from the
dropdown menu.
6. Setup Dirac Groups
It is recommended that if your theater includes
multiple subwoofers, manually correct levels,
EQ, and delay for each. Then, group all the
subwoofer channels together for the purposes
of Dirac Live calibration. Also, manually build
any crossover and EQ settings for active
loudspeakers. Group separate elements of a
single active loudspeaker together e.g. Low,
Mid, and High components of the LEFT FRONT
should be in a single generator group. Click
the SETUP button (C) beside the Dirac button.
A
B
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