whats the middle button thingy do?

kyle Posted 2004-05-04 6:50 AM (#188628) Subject: whats the middle button thingy do? Joined: March 2004 Posts: 21 Just wondering exactly what the middle button(cant remember what its called)tone enhancer filter thingy on the op 50 does. Is it different from what you adjust with the eq? thx kyle adamas w597(lovin it!!!) 1941 Gibson L7(a real treasure) Paul Templeman Posted 2004-05-04 9:15 AM (#188629 - in reply to #188628) Subject: Re: whats the middle button thingy do? Joined: February 2002 Posts: 5750 Location: Scotland do you mean the notch filter or the pre-shape? The notch filter is a narrow-Q very steep EQ cut which reduces feedback at the most prominant frequency, turn the knob during feedback at at some point it'll correspond with the feedback frequency & kill it. The pre-shape is a pre-set EQ curve which cuts the mids & boosts the lows and highs. Known as "smiley face" EQ or the "instant gratification" setting. It can sound good for strumming but tends to sound thin at higher volume. Personally I leave it switched out. kyle Posted 2004-05-04 11:02 AM (#188630 - in reply to #188628) Subject: Re: whats the middle button thingy do? Joined: March 2004 Posts: 21 yeah, pre shape thats it. Thanks for the info kyle