Specifications

Toft Audio Designs Series ATB Console ManualFor More Information, visit www.toftaudio.com
on the sub group section, at mixdown a 16 channel Series ATB becomes a 56 input mixer whilst a 24
channel becomes a 72 input mixer and a 32 channel becomes an 88 input mixer.
The input channel is provided with a stereo, non destructive after fade listen system (AFL). By de-
pressing this button, it is possible to hear the selected signal in isolation (or mixed with other select-
ed AFL signals). When the AFL button is depressed, the Channel ‘MUTE’ led will illuminate green to
show that AFL has been selected on that channel. When used for normal channel muting purposes,
the ‘MUTE’ led will illuminate red. The AFL signal follows the position of the channel pan control so
that the signal can be monitored with the stereo perspective intact. As it is a monitor function only,
the AFL can be depressed when recording or mixing without it harming the signal path. It is however
possible to change the function of the switch on a channel by channel basis so that the signal be-
comes a mono, pre-fade source (PFL). This is useful if the console is used in a live sound application
where a simple check to see if a channel is ‘live’ is required without having to push up the fader. By
removing the base panel of the mixer and accessing the individual channel pcb’s, it will be possible to
see a pushbutton switch mounted approximately halfway down the circuit board. When the button is
depressed (factory default setting) the signal is in AFL mode. If the button is undepressed, the signal
from that channel will become PFL.
Centre detented pan controls are provided for both the channel and monitor sections for accurate
placement of signals in the stereo spectrum.
The channel path is provided with a green l.e.d which illuminates when the signal reaches -20dB at
the channel output and a red l.e.d which illuminates when the signal reaches +10dB at the channel
output. These are extremely useful features and provide a constant indication that a signal is pres-
ent in the module (green l.e.d), and that signal peak is being reached (red l.e.d).
Routing to the multi-track groups is achieved by means of pushbuttons located beside the channel
fader. These are arranged in pairs and work in conjunction with the pan control so that if for example
groups 1-2 are selected and the pan control is in the mid position, the signal will be fed to groups 1
and 2 in equal amounts. If however the pan control is positioned fully anti-clockwise (left) the signal
will only feed group 1. If the pan control is positioned fully clockwise (right), the signal will only feed
group 2
A high quality 100mm metal bodied fader is provided which gives precise and smooth control of the
channel level.
Reference to the Input module signal flow diagram will help to give a better understanding of the
way in which the signal is routed from the input to the group output.
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INPUT MODULE
INPUT MODULE General Description
INPUT MODULE General Description
The Series ATB Input Module is an extremely sophisticated and
flexible channel that can be used for recording, mixing and moni-
toring multi-track recordings. It will accept the signal from a low
impedance balanced microphone, high or low level balanced line
input, or even the output from a musical instrument.
The signal can be shaped via the extremely musical four band
equaliser section that allows precise control over the audio spec-
trum. Boost and cut of 15dB is provided by centre detented
controls and the two sweep frequency ranges overlap to increase
the flexibility of the equaliser section. An 80Hz (high pass) filter
is also incorporated which can be switched in or out of circuit.
The equaliser is extremely useful in both recording and mixing
modes. The equaliser can also be switched from the input chan-
nel to the separate monitor channel incorporated into each input
module.
Six auxiliary sends are provided. Aux 1 is permanently pre-fade
while auxes 3-6 can be switched pre or post the channel fader
Auxes 5-6 can also be selected between the channel or monitor
path, greatly adding to the flexibility of the module.
Each module incorporates a monitor section which is used to
monitor a replay channel from a multi-track recording device.
This is in effect a separate signal path which ultimately feeds the
master remix outputs. By making the equaliser and auxiliary
sends 5-6 available to this path, this becomes an extremely ver-
satile feature of the console. When monitoring the output of a
multi-track recorder or DAW, it is possible to create a monitor mix
with equalisation and reverb effects completely independently
from the channel. These effects would also remain when the
recording is played back through the same monitor section.
When the console is used for mixing purposes, the monitor
section functions as an additional line input return to the stereo
mix busses, again with the ability to route the equalisation and
auxiliary sends 5-6 through the monitor section. This effectively
doubles the number of inputs available on remix. As there are
also eight dedicated stereo effects returns and 8 monitor returns
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