Panasonic Ramsa Audio Mixer Wr Da7 Users Guide

							As you are probably aware, video frame rates do not match up exactly with
digital audio sample rates. In a video production environment, if these video
frame rates and digital audio sample rates are not able to be locked together,
this will introduce many problems when it comes time to edit the audio and
video together.
To solve this problem, you may find that you need to pull up or pull
down the wordclock of the DA7 to match the frame rate of a video signal.
This subject is too involved to go into in great detail here. The DA7 has the
ability to slave to external wordclock, as well as generate fixed pull ups or
pull downs, so you will find that you will be able to resolve most situations
that are common to the film, television and post-production industry.
In most situations, you will pull down the sample rate frequency from
44.1kHz to 44.056 kHz or 48 kHz to 47.952.  However, in some situations,
you may need to pull up the sample rate. This would result in a sample
frequency rate change from 44.1 kHz to 44.144kHz or from 48kHz to
48.048kHz. These two solutions are the most common for film, television
and post-production.
If you are not familiar with the terms and situations discussed in the previous
paragraphs, it might be wise to do some further research. An excellent
reference guide for this and other timecode issues is available from SPARS
(the Society of Professional Audio Recording Studios). You can contact them
at their web site at www.spars.com/spars.
The ability to adjust the wordclock of the DA7 audio is determined by the
value entered in the [±0.1%]field of the [V SYNC]area of the [D-
I/O>INPUT SET]window.Chapter 12 
DA7 Users’ Guide12-6
12
D-I/O
Fs
44.1kHz
44.1kHz
48kHz
48kHzUP/DOWN
UP
DOWN
UP
DOWNAdjustment
+0.1%
- 0.1%
+0.1%
- 0.1%Frequency
44.144kHz
44.056kHz
48.084kHz
47.952kHz 
						

							[2 TR A]Areas
A status field shows whether or not there is a source connected to the 2 TR
Ainput ( when there isnt;  when there is). When in the
mode, the 2TR Ainput signal can be selected as the master
wordclock. Cursor to the 2TR IN Abutton, and press the ENTERbutton.
[SLOT] Area
[SLOT1]Fields
The left status field shows which option card is presently in the slot. The
status field will change to  when the input signal
comes into the slot. When the status field shows 
, the signal into
the slot can be selected as the master wordclock. Cursorto the desired
slot button, and press the ENTERbutton.
[SLOT2]Fields
These fields operate the same as the [SLOT1]fields.
[SLOT3]Fields
These fields operate the same as the [SLOT1]fields.
Chapter 12 
DA7 Users’ Guide12-7
12
D-I/O
SLOT Status Area
2 TR A Status Area 
						

							Chapter 12 
DA7 Users’ Guide12-8
12
D-I/O
[DIGITAL INPUT SELECT]Area
This area depicts the routing system for digital sources in the DA7. There are
three boxes inside the [DIGITAL INPUT SELECT]area that are used for
routing the audio signal.
[ANALOG IN 9-16]
This permits assignment of analog inputs 9 through 16 to the inputs 9
through 14 and 15/16. This is the default setting. To select these inputs to be
digital, insert a card in Slot 3, and see instructions under [SLOT3]in this
section.
For ANALOG IN 9-16, cursor to the square box to the right of the ANALOG
IN 9-16and 2TR IN Aareas, and press the ENTERbutton to toggle the
switch into either the up or down position. The up position allows the
ANALOG IN 9-16audio signals to travel through to INPUTS 9-16. Cursor to
the next box on the right, and again press the ENTERbutton to toggle the
switches up or down. In the up position, it completes the routing of Analog
9-16to INPUTS 9-14, 15/16.
[2TR IN A]
The [2 TR A]inputs can be channeled to INPUTS 15/16, MASTER L/R,or
routed directly to MONITOR A.
To route the 2TR IN Aaudio signals to INPUT 15/16, cursorto the square
outlined box to the right of the 2TR IN Aarea, and press the ENTERbutton
until the switch toggles into the down position. Cursorto the right, and toggle
the next square outlined box to the up position. The audio signal from the
2TR A INwill appear on INPUT 15/16.
The square box near the bottom of the [DIGITAL INPUT SELECT]area,
when toggled up, will route the 2TR A INaudio signal directly to the
MASTER L/Routput. When toggled to the down position, it disconnects the
send to MASTER L/R.
DIGITAL INPUT SELECT Area 
						

							[SLOT3]
Digital SLOT 3can have its inputs routed directly to inputs 9 through 16,
replacing the analog inputs. On the Top Panel of the DA7, inside the label
strip for inputs 9 through 16, it also says SLOT 3. When there is an option
card in SLOT 3, and you have selected the option on the DIGITAL INPUT
SELECTarea, these faders become inputs for that option card.
You can switch between the analog and digital inputs at any time, and as
often as you wish without changing any connections to the DA7. This allows
you to connect up to three digital multi-track machines for 24 digital inputs,
and 16 analog sources at the same time. You would simply have to choose
which set of inputs would be operational at any given time.
To send the SLOT 3input to INPUTS 9-14and 15/16, cursorto the box on
the far right, and press the ENTERbutton to set the switches in the down
position. This will route the SLOT 3audio signals to INPUTS 9-14, 15/16.
In order to make it easier for you to tell which set of inputs is selected, the
FLIPLED buttons for the associated Channel Stripswill turn (orange)
when digital SLOT3inputs are selected, and (green)when analog inputs are
chosen.Chapter 12 
DA7 Users’ Guide12-9
12
D-I/O
There is a shortcut to toggle inputs for INPUT 9 - 14and INPUT
15 - 16between SLOT3(digital)  and ANALOG IN 1-16. While
holding down the MMC/CURSORbutton in the CURSOR
CONTROLsection, press the D-I/Obutton in the SETUPsection. 
						

							Chapter 12 
DA7 Users’ Guide12-10
12
D-I/O
12-2 D-I/O, TO SLOT Window
The [TO SLOT]window functions as a built in “patch bay” for the DA7. From
the [TO SLOT]window, direct output assignments can be made to option
cards. Eight discrete sources can be sent to each option card. The eight
source choices can be from INPUT 1-32, AUX SND 1-6, BUS 1-8, MASTER L,
or MASTER R. Buses 1-8 are the default settings. 
Each SLOTname appears above the column for the respective slot. When a
column is being addressed, the SLOT #appears as inverse video in the
window, with the name of the option card underneath it.
Status Indicator
This status indicator shows what Channel Stripis currently selected. The
name of the channel appears in the data field to the right of the
status indicator.
Button
Select this to clear assignments and set to the default settings.
TO SLOT Window
The DIRECT LED button in the PAN/ASSIGN/ section
of the Top Panel is a shortcut to the [TO SLOT]window. 
						

							Chapter 12 
DA7 Users’ Guide12-11
12
D-I/O
[SLOT1]
Cursorto the top of this area  , and use the JogDialto scroll through the
available inputs. The data field will change as the choices are scrolled. Repeat
the process of assigning sources to the eight digital outs as needed. Or, you
can cursor to one of the eight selection fields, and press the ENTERbutton,
which will automatically assign the currently selected channel to that output.
[SLOT 2]
Cursor to the top of this area  , and use the JogDialto scroll through the
available inputs. The data field will change as the choices are scrolled. Repeat
the process of assigning sources to the eight digital outs as needed. Or, you
can cursor to one of the eight selection fields, and press the ENTERbutton,
which will automatically assign the currently selected channel to that output.
SLOT 1
SLOT 2 
						

							Chapter 12 
DA7 Users’ Guide12-12
12
D-I/O
[SLOT3]
Mode
In mode, [SLOT 3]is similar to [SLOT 1]and [SLOT 2].
Mode
The insertion mode allows you to send a signal to an external device
(using either the ADAT, TDIF, AESor AD/DA cards). You would then
route this signal to any outboard device, and return it to the DA7via
SLOT 3(using either the ADAT, TDIF, AESor AD/DAcards). You can
return to aux returns 1 through 6, buses 1 through 8, or MASTER L/R.
See Chapter 17, Optionsfor more details.
SLOT 3 in INS Mode
SLOT 3 in NORMAL Mode 
						

							Mode
The DA7can slave another DA7through the TANDEM option card.
and Buttons
Enable the [TANDEM] connection by moving the cursorto the 
button, and pressing the ENTERbutton. The  button will
toggle to  .
Data Field
indicates whether or not the [TANDEM] mode can be
activated. This information appears inside the data field [OK],
[DATA NG], or [SLOT NG].
Data Field
The [OFFSET DELAY]between the DA7and the slave mixer can be
set from this data field. When the field is highlighted, you can set
the value for the delay with the JogDial. Set this field to “2 sample”
for the Master DA7, if another DA7 is connected as the slave mixer.
Button
When the  button is selected, the DA7sets the delay value
automatically.
and Button
The communication port between the DA7s can be set to [TO PC]
or to[MIDI].
See Chapter 17, Optionsfor more details.
ON
OFF
OFF
ONOFF
Chapter 12 
DA7 Users’ Guide12-13
12
D-I/O
SLOT 3 in TANDEM Mode 
						

							Chapter 12 
DA7 Users’ Guide12-14
12
D-I/O
12-3 D-I/O, DITHER Window
This window shows and sets the status of Dither to the digital output signal.
In normal operation, the digital audio signals output from the DA7 and are
24 bit word lengths. If the device connected to the DA7 operates at fewer
than 24 bits, the bit in the least significant digits will be dropped by the
device on the receiving side, possibly resulting in unnatural sounds.  
Simply put, Dither permits you to connect two devices together that do not
have matching bit rates (but have matching sample rates) by using a complex
algorithm that reduces the word length. For example, you may wish to
record to a DAT machine which only records 16 bit words. This problem can
be solved by adjusting the word length output from the DA7 by Dither. The
bit number output by the mixer should be set to match the device connected
to the DA7.
DITHER Window
If the correct dither adjustment is not applied to the signals output
from the DA7, the integrity of the audio will be diminished. The
dither adjustment required is determined by the bit rate of the
receiving device. Set the dither characteristic to match. 
						

							Cursorto the bit field, and change the value by rotating the JogDial,setting
the bit rate to the same as the receiving device. The setting is adjustable in
one bit increments from 23 to 16. If  , the DA7 will output 24 bits. Then
cursorto the  button, and press the ENTERbutton to activate the setting.
The  button will toggle to  .
ONOFF
OFF
OFF
Chapter 12 
DA7 Users’ Guide12-15
12
D-I/O
When the  button is displayed for an area in the [DITHER]
window, the bit rate output is 24 bit. Failure to toggle the  button
to  will cause the default bit rate of 24 bit to be output for the
signal, regardless of the bit rate setting for the area.
ON
OFF
OFF