Tascam Digital Mixing Console DM-24 Owners Manual

							14 – Surround operations—“Pan” controls
 TASCAM DM-24 Reference Manual 111
nels), 1-8, 9-16, 17-24, 25-32 (blocks of eight 
channels).
3Use POD 1 to set the level for the selected 
group.
4Move the cursor to the on-screen 
SET button, 
and press 
ENTER.After making a “global” setting in this way, use the 
cursor keys and PODs to trim the individual channel 
levels as desired.
It is also possible to use the faders to control the 
boom level (use the 
BOOM LEVEL FADER CONTROL but-
ton at the top of the screen, and the faders as 
described in “Using the faders to change values” on 
page 14. 
						

							112 TASCAM DM-24 Reference Manual
15 – High sampling frequency
The way in which the DM-24 operates in high sam-
pling frequency mode (88.2k and 96k) is slightly dif-
ferent in many cases to the operation in normal 
sampling frequency mode (44.1k and 48k).
This section describes the differences between high 
sampling frequency mode and normal sampling fre-
quency mode.The high sampling frequency can be obtained inter-
nally, when the DM-24 acts as the word sync clock 
for the whole of the audio system, or the DM-24 can 
act as a word sync slave, taking word sync from other 
suitably-equipped devices.
To select high sampling frequency
Use the DIGITAL key (SHIFT and AUX  5- 6), and 
choose the 
CLOCK screen.
At the top of this screen is the 
Hi-sampling / Normal-
sampling
 pair of on-screen radio buttons.
Select the 
Hi-sampling button and press ENTER.
Changing from normal to high sampling frequency 
mode, and the other way round brings up a pop-up message which asks for the DM-24 to be turned off 
and on again.
The sampling frequencies displayed on the screen as 
available for use change, as shown here.
NOTE
If other devices are not connected properly, this may 
cause noise in the monitoring system when the DM-24 
restarts. Make sure that all monitoring equipment lev-
els are turned down (or the monitoring equipment is 
turned off) when making these changes.
When the high sampling frequency mode is selected, 
many of the control screens change as explained in 
this section.
The word sync output from the DM-24 can be set to 
be 
DOUBLE or NORMAL speed in high sampling fre-
quency mode. This may be necessary if the DM-24 is 
to act as a word sync master to another device that 
cannot accept double-speed word sync.
NOTE
The DM-24 itself can only accept normal-speed word 
sync when it is in high sampling frequency mode.
Constraints on other devices
When using the DM-24 is high sampling frequency 
mode, other digital audio devices must be compatible 
with this mode (that is, they must be capable of 
accepting and/or transmitting digital audio data at 
these high sampling frequencies.
Such devices are the TASCAM DA-98HR and the 
TASCAM MX-2424.
When connecting to other devices via AES/EBU 
connections made using the optional AES3 slot card, 
there are some important points to be noted.The SLOT screen of the DIGITAL display shows this:
There are two ways in which AES/EBU data can be 
sent at high frequencies.  
						

							15 – High sampling frequency—Channels, etc.
 TASCAM DM-24 Reference Manual 113
DUAL-LINE is a “parallel” method, in which a pair of 
AES/EBU cables send two channels of high sam-
pling frequency audio data.
HIGH-SPEED uses one AES/EBU cable to send two 
channels of audio data at twice the standard data rate.
In this screen, the output format of the four AES/
EBU input streams available to the DM-24 can be 
selected to be either high-speed or dual-line, depend-
ing on the capabilities of the other equipment con-
nected to the DM-24.This choice also applies to devices connected to the 
DIGITAL IN and DIGITAL OUT ports of the DM-24, 
as shown here.
The high sampling frequency format of 
DIGITAL IN 
and 
OUT 1 and 2 must be altered together (they can-
not be set independently) and the 
MODE choice (at the 
top of the screen, highlighted here) is either 
NORMAL, 
DUAL-LINE or HIGH-SPEED. 
NOTE
These settings can also be made in normal sampling fre-
quency mode, but the frequency conversion must be set 
to in for this to apply.
Channels, etc.
When high sampling frequency has been selected, 
the number of channels available is halved, from 32 
to 16.
The first sixteen physical faders 1 through 16 are 
used for this purpose. The fader layer 17-32 has no 
meaning in the high sampling-frequency mode.
Twelve channels are available for mic/line input, and 
a further four for channel input.
The number of aux sends is also reduced, from 6 to 4.However, the number of busses is unchanged at 8.
Also note that the number of AES/EBU channels 
available on any installed slot cards is now halved.
The number of onboard compressors and dynamics 
processors, etc. is also reduced.
However, the functionality of the components that 
make up the modules (EQ, etc.) is not impaired or 
reduced. 
						

							15 – High sampling frequency—Channels, etc.
114 TASCAM DM-24 Reference Manual
High sampling frequency I/O
The following explains how the I/O assignments are 
changed when high sampling frequency is selected.
Instead of being divided into groups of eight, as in 
the usual assignment screens (“Setting up the I/O” on 
page 36), these are selected using groups of four, as 
shown in the figure above.
Eight channels are shown on screen at one time.
The second group of eight channels (the second four 
of which cannot accept signals from the mic/line 
inputs) is shown here:
Note how the usual eight channels of the TDIF con-
nectors are reduced to four in this mode.
The output screen changes as shown here, as only 
four output channels are available on each output groups. The eight output busses are therefore split 
between two groups (the first four going to the first 
group selected, and the second four to the second 
group). The number of direct outputs is also reduced 
in this mode, from 16 to 8.
Finally, the screen in which the assignable sends are 
used in high frequency sampling mode differs 
slightly from the usual:
There are only two assignable sends and returns (the 
physical connectors used here are 1 and 2).
Only two channels of master compressors are avail-
able in high sampling frequency.
In other respects, this screen operates in the same 
way as its normal sampling frequency counterpart. 
						

							15 – High sampling frequency—Monitoring
 TASCAM DM-24 Reference Manual 115
Monitoring
The monitoring system in this mode is very similar to 
the normal mode:The difference is in the choice of the destinations for 
the oscillator and the talkback slate (there are only 
four aux sends available for the destination). See 
“Slate settings” on page 77 and “Lineup oscillator” 
on page 77 for further details of slate and oscillator 
operations.
Aux sends
Since there are only four aux sends, the aux send 
screens change. For instance, the module Aux screen 
is slightly “stripped down” to show only four Aux 
sends.When the AU X  5 - 6 key is pressed and the DM-24 is 
in high sampling frequency mode, the key has no 
effect.
When either 
AUX  1- 2 or AUX  3- 4 is pressed, only 
sixteen channels are shown on screen.
Channel stereo linking
When the DM-24 is in high sampling frequency 
mode, the channel linking screen (“Linked modules” 
on page 60) looks slightly different from the usual 
screen:As can be seen here, there are only 16 channels avail-
able, and four aux sends.
Links are made and unmade in the same way as in 
normal sampling frequency mode. 
						

							15 – High sampling frequency—Grouping
116 TASCAM DM-24 Reference Manual
Grouping
Mute and fader groups are displayed also slightly dif-
ferently on account of the reduced number of chan-
nels, as shown here:The mute grouping is shown here, but the fader 
grouping is almost identical.
When the change is made between high sampling 
frequency and normal sampling frequency modes, 
the console reverts to “neutral settings” and the cur-
rent groupings are no longer valid.
For details of how to operate these facilities, see 
“Grouping” on page 69.
Trim and delay
The trim screen shows 16 channels, and the delay 
screen shows 12 channels, rather than 32.Also, note that the range for delay times remains the 
same, even though the sampling frequency is 
different.
Libraries
Because of the different configuration of the DM-24 
in normal and high sampling frequency modes, it is 
not possible to use a normal frequency snapshot in 
high sampling frequency mode, or the other way 
round.
Snapshot library entries are marked with an 
Hs (high 
sampling) or 
Ns (normal sampling) beside their 
names in the list of library entries on the library 
screen.An appropriate popup message is displayed if an 
attempt is made to load a different kind of snapshot 
library entry, and the load fails.
However, note that it is possible to store dynamics 
processor, effects and equalization library entries in 
one sampling frequency mode, and recall them for 
use in the other mode. 
						

							15 – High sampling frequency—Other screens
 TASCAM DM-24 Reference Manual 117
Other screens
Throughout the operation of the DM-24, whenever a 
normal sampling frequency screen displays 32 chan-
nels, or provides facilities for 32 channels, in high-
frequency mode this will be halved to 16.
For example, in this screen, the meter layer cannot 
follow channels 17 through 32 (they do not exist) and 
therefore the option is not available.Also, since there are only four aux sends available in 
high sampling frequency mode, all screens which 
refer to the aux channels (such as the one below) 
reflect this. 
						

							118 TASCAM DM-24 Reference Manual
16 – Options
The DM-24 can be expanded by means of cards (one 
or two) installed in the expansion slots.
WARNING
Regarding installation, consult your nearest TASCAM 
dealer.
Do not install options by yourself which require open-
ing the DM-24 or you will lose your warranty.
You will need a cross-head (Phillips) screwdriver.
1Turn off the DM-24 and disconnect it from 
the power supply. Disconnect all other equip-
ment connected to it.
WARNINGWARNING
The above step is most important. If you do not do this, 
there is a risk that you may cause damage to the DM-24 
as well as other equipment.
2Use the screwdriver to remove the blanking 
panel from the slot into which you will fit the 
interface card. Keep the retaining screws in a 
safe place.
We suggest that you start from the top slot 
(slot 1) and work downwards. Take care, if 
you are removing a previously-fitted inter-
face card, that you are removing the retain-
ing screws, and not the smaller screws which 
fix the card to the rear plate. Also, if you are 
removing a previously-fitted card, use the binding posts on the rear plate to help 
remove the card.
3Remove the interface card from the anti-
static protective bag.
4Hold the card by the edges, and insert it, 
component side upwards, into the slot.
5Locate the card into the connector inside the 
DM-24. Push the card firmly, without forc-
ing, so that the connector grips the end of the 
card. A new DM-24 and/or new card may be 
a little stiff. Make sure that the card is 
pushed as far as it will go (so that the card 
rear connector plate touches the rear panel 
of the DM-24).
The cards available for the DM-24 are:
 Cascade card
TDIF card
ADAT card
 AES/EBU card
 Analog I/O card
The setting up of these cards is done using the 
SLOT 
screen of the 
DIGITAL display.
This screen is split into two: the left half of the screen 
represents the card in slot 1 (the top slot) and the 
right represents the card in slot 2 (the lower slot). If 
either or both of these slots are unoccupied, the 
screen shows 
No Card for the appropriate slot(s).
Clock sources
Any cards which provide digital audio input facilities 
(that is, the cascade card, the TDIF card, the ADAT 
card and the AES/EBU card), can be used as clock 
sources.The cards are listed in the CLOCK screen when they 
are fitted.
In the case of the AES/EBU card, any of the four 
inputs (two in the case of high sampling frequency) 
can be selected as the word sync source.
Cascade slaves automatically take their clock from 
the master (which is free to take it from any other 
source). 
						

							16 – Options—Cascade card
 TASCAM DM-24 Reference Manual 119
Cascade card
This card allows the connection of two DM-24 units 
to increase the number of channels, etc. available. A 
cascade card must be fitted in slot 1 of each unit to be 
cascaded.
In a cascade chain, one unit is designated as the mas-
ter unit, and the other as a slave. The master unit 
must always act as the word sync master for the cas-
cade chain (though it can act as a word sync slave in 
the overall audio system).
There is one connection to be made between the two 
units. This connection must be made between the 
cascade cards with the power off on both units. It car-
ries all appropriate audio signals as well as the sync 
signals and control signals.
Only use a TASCAM cascade cable designed and 
produced for this purpose when making this connec-
tion.This effectively gives you one double-sized DM-24 
mixing console, with the following features:
 32 mic/line inputs
 64 channels
 48 TDIF I/O channels
 16 lightpipe I/O channels
 4 AES/EBU 2-channel I/O
 4 SPDIF 2-channel I/O
 8 assignable sends and returns
 4 internal effect processors
 33 touch-sensitive, motorized faders
 The ability to run a 24-track, 24-bit 96 kHz 5.1 
automated mixing environment
Setting up the cascade
When the connection between the two cascade cards 
has been made, turn on the slave unit, followed by the 
master unit. Wait until the fader calibration is ended, 
and then go to the 
SLOT screen (soft key 3 in the 
DIGITAL screens) on the DM-24 which will be used as 
the slave.
The cascade card is identified as 
CASCADE Card at the 
top of the slot 1 section of the screen:Set the unit up as the cascade slave (
SLAVE) using the 
on-screen radio button.
Now enter the same screen on the unit which will be 
used as the master, and set that one up as the cascade 
master (
MASTER button).
On the slave, set the 
CASCADE to ON. The display 
shows 
Scan Cascade Machine. Leave the cursor by the 
CASCADE button.
Next, on the master, set 
CASCADE to ON. Leave the 
cursor by the 
CASCADE button.
The master display shows 
Found DM-24 slave machine! 
and the slave display shows 
Found DM-24 master 
machine!
.
An error message is displayed if the cascade is estab-
lished and subsequently becomes disconnected.
Use of the cascade
Since the cascade function allows busses, aux sends, 
etc. to be controlled from the master unit, and thereby 
be shared between the two cascaded units, the two 
DM-24s can be used as one large digital console.The ENABLE checkboxes allow the selection from the 
master unit of which busses and functions will be 
shared. 
						

							16 – Options—Cascade card
120 TASCAM DM-24 Reference Manual
Typically, monitoring and stereo outputs should be 
connected to the cascade master, but there are a num-
ber of occasions when these outputs may be used 
from the slave as well as from the master.
For example:
 Using the stereo buss of both units would allow the 
stereo buss of one unit to be used dry, with the 
other unit’s stereo buss being processed (compres-
sor, etc.). The digital outputs (AES/EBU, SPDIF), together 
with the balanced analog) allow for up to 6 differ-
ent stereo mixes to be output simultaneously).
 The monitor outputs on the slave (
CR and 
STUDIO) could be used to drive a different set of 
monitor speakers (for example mid-field monitors 
and smaller computer-type speakers, while the 
master unit drives main and near-field speakers).
Cascaded facilities
Soloing and muting When two units are cas-
caded, the soloing and muting can be shared. How-
ever, note that mute groups and fader groups are not 
cascaded.
Snapshots Snapshot recall and store is cascaded. 
In other words, naming and storing a snapshot on the 
master also names and stores it on the slave, and 
recalling this snapshot on the master also recalls it on 
the slave.
This data must be dumped and reloaded individually 
from each unit for further use.
Automation When automation is taking place, the 
master must receive external timecode (either LTC or MTTC). This timecode is passed through the cascade 
connection to synchronize the slave automation.
NOTE
The automation UNDO facility is local to one unit only 
and is not cascaded.
MIDI Control Change Each DM-24 in a cascade 
can be set to send and receive MIDI Control Change 
messages which can be used to control DAWs,. Since 
these can be set independently for each unit in the 
cascade, a very large number of MIDI controllers can 
be assigned and used when using two DM-24 units 
cascaded together.
Cascading and effects
When two units are cascaded, there are four internal 
effects units in total. These four effects are all avail-
able for assignment from any aux send on either unit.
For example, a reverb could be set up on aux 3, a 
chorus effect on aux 4, a delay on aux 5, and a phased 
on aux 6, across both units.NOTE
Only the “local” effects can be used with inserts and 
assignable inserts on each unit.
See the separate effects documentation for further 
details of assigning effects.