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DME Advantage #1
Surround System
DME64N / DME24N
Downmixing Coefficients
Broadcast engineers will really appreciate the downmixing capability offered by the DME Series. The above
configuration, for example, is one of the sample system's four DownMix modules, each of which uses a
different set of coefficients to instantly convert 5.1 surround sound to a stereo output. Having a range of
different downmixing options readily available within a single unit is vastly more convenient than the
conventional approach, where a single set of coefficients is adjusted for each individual application.
Allowing different sets of coefficients to be evaluated quickly, conveniently, and objectively in order to select
the best, Yamaha have made the task of downmixing considerably easier.
Matrix Mixer
As this DME64N example shows, all the functionality you'll
probably ever need for surround-sound monitoring in the
broadcasting arena has been packed into a single unit. In
addition to basic multichannel monitoring, you get bass
management for reliable low-end control, Monitor Speaker
Alignment for enhancing monitoring precision by compensating
for physical distances to speakers, and the downmixing
functionality that is a critical component of surround
mixing in today's broadcast applications. And as with other
components, you can select, assemble, and configure these
in a free, easy, and intuitive manner if so required. This setup
also features a source selector for switching between four
different stereo mixes created using a range of downmixing
coefficients, making the evaluation of different mixes easier
than ever before. In short, surround-sound monitoring just
got a lot more convenient and intuitive.
The sample system's output-stage Matrix Mixer is fed by eight input signals – namely, the 5.1 surround
signals processed by the Bass Management module and the stereo mix from the selected DownMix user
module. The six surround channels can be grouped together using the Parameter Linking function for
convenient mixing, while a single switch toggles instantaneously between the 5.1 mix on channels 1 to 6
and the stereo mix on 7 and 8.
Bass Management Controller
Monitor Speaker Alignment
5 6
Unit Inputs
GAIN (Fader)
1-Channel
Matrix Mixer
8-Input, 1-Output
Not limited to preset configurations and components alone, the DME Series lets you create user-defined configurations by freely assembling components and saving them
as user modules. For example, this original user module forms the core of the Bass Management Controller from the surround system on the left. Specifically, the
audio-processing circuit splits up the six outputs of the 5.1 surround mix, extracts the low-frequency components of the five full-range speakers, and combines them with
the LFE signal using a Matrix Mixer component. Individual and overall levels are adjusted and balanced within this mixer, and cross-over points are setup as required via
the combination of high-pass and low-pass filters. Broadcast engineers know the importance of comparing the straight 5.1 surround sound and the bass-managed mix,
and that's why another Matrix Mixer has been setup just in front of the output stage for highly convenient switching between the two at the click of a button. And thanks to
the unprecedented flexibility offered by user modules, this same setup can even be modified to effortlessly handle 7.1 surround and other original specifications.
Unit Inputs
Matrix Mixer
2-Input, 1-Output
In the surround system example on the left, a wider monitoring area is needed, so a pair of back surround speakers is used on both the left and right for eight speakers in total. In an ideal world, surround-sound speakers would all
be setup at the recommended angles and distances from the listener in order to facilitate highly accurate monitoring. Unfortunately, however, factors such as room shape often render such precise positioning impossible.
Compensation for this using individual delays is known as "time alignment". Normally, the more speakers used, the greater the number of delay units required, and the more complex and expensive time alignment becomes. Not so
with the Yamaha DME Series, where multiple delays can be easily setup and controlled within a single hardware device. Need precise time alignment for more monitors? Just add delays to the configuration and adjust.
In this surround system, time alignment is realized via the Monitor Speaker Alignment user module shown above. Of the monitoring environment's eight speakers, no alignment is required for the standard left and right or for the LFE,
but highly-precise short delays are provided for each of the remaining five channels. Since fine tuning is so essential to multichannel monitoring, speaker positions can be virtually adjusted in units of one millimeter. Furthermore,
another feature of advantage in surround-sound monitoring is the array of eight-band parametric EQs used to tune individual speaker outputs and to adjust for unique frequency characteristics in the monitoring environment.
Turn to page 49 for information on how to download and install DME Designer.
HPF
Mono
LPF
Mono
Delay-Short
1-Output
Matrix Mixer
12-Input, 8-Output
Unit Outputs
PEQ-Mono
8-Band
Unit Outputs