He would set the flanger to self oscillate , which would make the pitch of the resulting signal alternate up and down to create a sound similar to a dive bomb or a pull up on a whammy bar .
Gilbert stated the flanger had been modified .
Gilbert would set the flanger to self oscillate , which would make the pitch of the resulting signal alternate up and down to create a sound similar to a dive bomb or a pull up on a whammy bar .
Gilbert stated the flanger had been modified .