Hi I recently bought a Danelectro Free Speech Pedal (Talk Box). It worked fine for the first few days but then, when i turned the volume up on my amp so it was reasonably loud, it started making a really high pitched screech. It isnt the guitar becuase the screech continues even when they guitars volume is on zero. I tried moving the mics away from the amp but it made no difference. Any ideas whats wrong?
sounds like you have cheap cables
Parkwood PW320M
Epiphone Les Paul Standard
Epiphone C-40 willie nelson signature
Squier Strat
Some beat up acoustic from '68

Vox Ad50vt
Crate xt15r

Vox Clyde McCoy Wah
I tryed turning it down but it makes it too quiet. Might it just be because i have a shit amp