User guide

DTS-HD Master Audio Suite™,
User Guide
v 2.5
Confidential - Do NOT Duplicate 41 DTS Document No.: 9301F55800D
17781 v1
7.4.1 Downmix to 5.1
The Downmix to 5.1 section of this panel allows the user to specify the appropriate parameters for the
downmix as shown in Figure 7-15. This section will only be active if the selected channel layouts have
7.1 or 7.0 channels.
Figure 7-15 Downmix to 5.1
The channel layout selected on the Audio panel will dynamically update the headers in the columns of
the Downmix to 5.1 faders. The first fader (i.e. L, R, C, LFE, Ls and Rs) in each control set, known as
Scaling Coefficients, shows the scaling value for each of those channels. The values in these fields, at
the bottom of each column, specify the channel’s contribution to the output mix. The values range from
0.0 to -6.0 (0 to -6.0 dBFS) inclusive. The mixing coefficients for the extra channels (i.e. Lh and Rh in
Figure 7-15), known as Downmix Coefficients, range from 0 to -60.0 (0 to -60.0 dBFS) inclusive or -INF.
INF implies that there is no contribution to the channel (-INF = Negative Infinity). The labels on the
extra channels will update dynamically depending on the channel layout that is selected on the Audio
panel.
The other two columns in each control area are the surround channels (i.e. the two extra channels in the
7.1 channel layout case). The values in these fields specify the supplemental channels’ contributions to
the output mix of the L, R, C, LFE, Ls and Rs channels).
When the phase shift button is activated,
the corresponding channel above it will be phase-reversed
(180 degree phase inversion) before the channel is mixed into the output mix. The downmix levels can
be updated either by clicking and dragging on their vertical faders or by entering the desired downmix
value in the bottom input text fields. If the entered value is outside the minimum or maximum values, the
fader will be positioned to the nearest value. For example, if the entered value is greater than 0.0, the
fader would be positioned to 0.0 and the text field would be updated to 0.0. If the entered value is less
than -60.0, the fader position would be located at the minimum value and the text field would indicate
“INF”.
Note: If the faders in the Downmix to 5.1 sections are altered and the user decides to change the
selected channel layout on the Audio panel, when the Downmix panel is subsequently displayed,
the faders will be changed to the default values for the selected channel layout. The faders will
also change to the default setting for the selected channel layout when the user selects the
button.