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Using the Insert Jacks
Sometimes, you may want to add additional gear into your signal
path before your analog-to-digital converter digitizes your signal
and sends it to the computer. For example, many bass players
like to compress their instrument with an analog compressor
before recording into the computer. Inserts help you do this by
letting you tap into your signal after the IO|14/26’s preamplifier
but before the A/D converter. The two diagrams below
demonstrate where the inserts fit into your signal path.
In the diagram to the left, no insert is used and your signal passes
straight from the preamp to the A/D converter. In the diagram
on the right, an effects processor is inserted into the signal path
just after the preamp (before the A/D converter).
Note that you need a special “insert cable” to utilize this
connection. These cables have a ¼” TRS connector on one end
and two ¼” TS connectors on the other end. The TRS side goes
into the “insert” jack on the IO|14/26. The two TS connectors
are usually labeled “send” and “return.” The “send” plug goes to
your external device’s input whereas the “return” plug connects to
the device’s output.
Additional Uses of Insert Jacks
Inserts can be used in two additional ways that you may find
useful. They are as follows:
1. Using the IO|14/26 as a preamplifier – In certain
situations, you may want to use the IO|14/26’s preamps by
themselves. For example, if you’re recording a performance
onto an external hardware recorder (such as an Alesis HD24)
but you need more preamplifiers, you can use an insert’s
“send” cable to send your preamplified signal to the recorder
and simply not use the “return” connection on the insert
cable.
2. Bypassing the IO|14/26’s preamplifier – The IO|14/26
has excellent sounding preamplifiers built in, but if you have
a megabucks or vintage preamp that you want to use instead,
experiment with connecting it to the insert jack. The insert
jack allows you to use your external preamp while completely
bypassing the IO|14/26’s built in preamplifier.
To bypass the IO|14/26’s internal preamplifier, connect the
“return” of the insert cable to your external device. Leave
the “send” of the insert cable disconnected.
Doing this will unbalance the external preamplifier’s signal.
In most cases this is not a problem, but check with your
preamplifier’s manufacturer for any noise, level, or grounding
concerns before connecting your equipment in this way.
