10) Main Out. These are the main outputs for the IUSB400. The output level of the Main Outs is controlled
by the Main volume knob on the front of the unit.
Power User Tip: You must connect speakers or headphones directly to your iUSB400 in order to monitor playback from
your computer.
11) MIDI I/O. MIDI stands for "Musical Instrument Digital Interface." MIDI inputs and outputs allow
connection to, and communication with, external MIDI equipment. One function of these ports is MIDI
sequencing but the MIDI protocol can be used for much more than instruments and sequencing.
Power User Tip: MIDI is not audio but is frequently used to trigger or control an audio source (such as a plug-in or
synthesizer). It's important to ensure that your MIDI data is correctly sent and received by the appropriate hardware
or software devices. If the devices generate audio, you may also need to return the audio to an IUSB400 input channel.
Please consult the User Manuals of your MIDI devices for help with MIDI setup and usage.
12) USB Port. This is where you connect the USB cable from your IUSB400 to your computer. The
IUSB400 is bus-powered via this connection and does not require an external power supply. Your
iUSB400 is compatible with both USB 2.0 and 3.0 ports.