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Question
#20
Is there any way to control feedback to produce specific pitches?
Answer
There is really no way to conjure up specific pitches with feedback.
You can definitely get different pitches by changing the angle
of your guitar in relationship to the amplifier. You may come
across a note by doing some experimentation, but playing a specific
feedback note on command would be extremely difficult at best.
There are just too many variables to make that possible. Even
Hendrix would not be able to pull off the feedback from the Star
Spangled Banner two times in a row exactly the same. He would
ride the feedback where it took him.
Crank up your amp with lots of distortion. If you have a small
amp, prop it up in a chair so that it is more on the level of
you guitar. Play a note, then face your amp. While the note is
ringing, move closer to the amp until the note starts to feedback.
Then try turning to the left and right, or angling your guitar
towards the floor or ceiling. Different angles will help produce
some different pitches.
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