5 – Channel modules : Module setup
84
TASCAM DM-4800
User’s Manual
The maximum delay time is 16383 samples, at every
sampling frequency. In milliseconds, this equates to:
Use the POD 4 encoder to switch between millisec-
onds and samples as the units in which the delay time
is set and displayed.
Digital trim
Allows the module’s input to be
adjusted. This is post-phase and pre-gate. It is
entirely independent of the analog
TRIM
controls on
the mic/line inputs.
The value of this digital trim can be adjusted from a
cut of –50dB to a boost of +10dB in 0.5dB steps.
Also see “Phase/trim/delay” on page 84 below.
Dithering (stereo buss module only)
When
going from 24-bit to 16-bit, using dithering is often a
good way of reducing noise, etc. The POD 2 encoder
can be used to set dithering
Off
(24-bit) or to the 16-
bit (
On
) setting. The exact form of bit-reduction used
can be set here as well as in the
DIGITAL FORMAT
screen
(see “Digital I/O setup” on page 51):
TRUNCATE
,
DITHER
and
NOISE SHAPED
.
Pan and balance settings
Many of these set-
tings are dependent on whether the channel being
edited is linked to another channel, as well as to
whether the project is a stereo or surround project.
The POD 4 encoder is used to set the pan or balance.
Beside the on-screen representation of this control is
a
CENTER
button. Use this to center the pan or balance
setting easily.
In the “normal” (unlinked, stereo) case, the odd-
numbered (left) panpot of a pair of channels can be
ganged together with the even-numbered (right)
panpot. Use the on-screen
GANG
button to link the
panpots of the channels in this way.
A linked pair
of channel modules has the pan con-
trol of a mono channel replaced by a balance control.
In the case of such a control, no ganging of control is
possible, but two other controls are provided.
The first, controlled by the POD 2 encoder, allows
either of the two modules to used as a mono signal
(
LMono
,
Rmono
) or the two together as a stereo signal
(
STEREO
). In the first two cases, the balance control
effectively acts as a pan control).
The second control, set using the POD 3 encoder,
controls the width of the stereo image created by the
two controls from a mono point source (center) to a
stereo (counterclockwise) image. Turning the pointer
clockwise from the center reverses the left and right
channels.
Phase/trim/delay
Phase
The phase of an input signal, as explained
above, can be set either to normal or reversed.
Use the
ASSIGN PARAMETERS
screen (“Global module
settings” on page 72) to view and set the phase for all
input at once.
FS
Maximum delay (ms)
44.1
371.5
48
341.3
88.2
185.7
96
170.7
Table 5.7: Channel delay
Figure 5.15: Linked pair balance controls
