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The Back Panel
1 AC POWER INPUT Plug the 7-pin DIN connector from the included
power supply in here. Do NOT use a supply which is not expressly
intended for the ATR-1a (even if you could find one with the that
weird plug on it). Bad things could happen.
2 MIDI IN Connect the MIDI Out from a MIDI keyboard, sequencer, or
other MIDI source in here.
3 FOOT SWITCH Plug in a foot switch here. A 1/4-inch TS (tip-sleeve)
plug is required. There are two varieties of foot switch: those that are
shorted by default and those that are open by default. You should plug
in your foot switch and then power on the ATR-1a. The ATR-1a will
detect which kind of foot switch you have and behave accordingly.
4 BALANCED LINE INPUTS Inputs can be 1/4-inch TRS (tip-ring-sleeve)
Phone, 1/4-inch TS (tip-sleeve) Phone or female XLR.
Note: The XLR input is NOT a microphone input. A line level signal is required.
Also Note: If you use a 1/4-inch TS plug, the input will of course not be balanced.
Yet Another Note: The two inputs will not mix two signals. Plugging in a phone plug will
disconnect the XLR input.
5 LINE OUTPUTs Outputs can be 1/4-inch TS (tip-sleeve) Phone Unbal-
anced or male XLR Balanced.
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