How to get Guitar Feedback Sustain on every single note and CHORD!!
Gibson Les Paul 1959 Standard Reissue, Alexander Niemand Zagray, 1971 Marshall 4x12 model 1960A. Close mic Unidyne IV 548 and room mic AKG C414 BXL2 Omni. All knobs on the amp at max but bass (20%) and XOD Volume (70%). EXTREMELY LOUD.