4.10.1
DAC Controls
4.10.2
Line Output Mixers
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TLV320AIC3107EVM Software
The DAC/Line Outputs tab controls the DAC power and volume, as well as routing of digital data to the
DACs and the analog line output from the DACs. (See
Figure 26
.)
On the left side of this tab are controls for the left and right DACs.
In similar fashion as the ADC, the DAC controls are set up to allow powering of each DAC individually and
setting the output level. Each channel's level can be set independently using the corresponding
Volume
knob. Alternately, by checking the
Slave to Right
box, the left-channel Volume can be made to track the
right-channel Volume knob setting; checking the
Slave to Left
box causes the right-channel Volume knob
to track the left-channel Volume knob setting.
Data going to the DACs is selected using the drop-down boxes under the
Left
and
Right DAC Datapath
.
Each DAC channel can be selected to be off, use left-channel data, use right-channel data, or use a mono
mix of the left and right data.
Analog audio coming from the DACs is routed to outputs using the
Output Path
controls in each DAC
control panel. The DAC output can be mixed with the analog inputs (LINE2L, LINE2R, PGA_L, PGA_R)
and routed to the Line or High Power outputs using the mixer controls for these outputs on this tab (for the
line outputs) or on the High Power Outputs tab (for the high power outputs). If the DAC is to be routed
directly to either the Line or HP outputs, these can be selected as choices in the
Output Path
control.
Note that if the Line or HP outputs are selected as the Output Path, the mixer controls on this tab and the
High Power Output tabs have no effect.
On the right side of this tab are horizontal panels where the analog output mixing functions for the line
outputs are located.
Each line output master volume is controlled by the knob at the far right of these panels, below the line
output labels. The output amplifier gain can be muted or set at a value between 0 and 9 dB in 1-dB steps.
Power/Enabled status for the line output can also be controlled using the button below this master output
knob (
Powered Up
).
If the DAC
Output Path
control is set to
Mix with Analog Inputs
, the six knobs in each panel can be used
to set the individual level of signals routed and mixed to the line output. LINE2L, LINE2R, PGA_L, PGA_R,
and DAC_L and DAC_R levels can each be set to create a custom mix of signals presented to that
particular line output.
Note:
if the DAC
Output Path
control is set to anything other than
Mix with Analog
Inputs
, these controls have no effect.
SLAU261 – November 2008
TLV320AIC3107EVM-K
27
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