Using The Musiq Feature; One Guitar (No Sidechain) - DigiTech HARMONYMAN Owner's Manual

Using the musIQ Feature
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When the musIQ feature is enabled, it "listens" to your guitar playing in
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order to automatically determine the best notes for harmonization with Triad-
Centered and Scalic Voicings. The way in which the HarmonyMan does this
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is slightly different depending on whether or not you have a guitar connected to
the Sidechain Input.

One Guitar (No Sidechain)

When only one guitar is plugged into the HarmonyMan (via the Clean Guitar
Input jack), the HarmonyMan uses this clean guitar signal to determine the
key and scale. In order for the HarmonyMan to actively follow the key of the
song, the musIQ button must be on and the Harmony Effect must be turned off.
During this time the musIQ feature analyzes the clean guitar signal and updates
the Harmony Key Display.
When the Harmony Key Display shows a circling red LED, the HarmonyMan
does not currently have any information to determine the key and scale. When
the key has been set, but some uncertainty exists, the Harmony Key Display
shows a yellow LED for that key. When the key is determined and certainty
exists, the LED turns green. Note that the key chosen for harmonies does not
always match what is considered to be the key of the song. An example would
be that a song in G that uses the Mixolydian mode would typically sound best
with harmonies in the key of Cmaj / Am.
Note that as soon as the harmony effect is turned on (by pressing and releasing
the Harmony On/Off footswitch), the current harmony key shown in the
Harmony Key Display (whether yellow or green) is locked in and will not
change, even if the musIQ button is illuminated. This ensures that the guitar
solo that is being harmonized will not cause the key to change inadvertently.
Once the harmony is turned off, the monitoring of the key by the musIQ
feature will continue.
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