Learn diminished triads by degree, sound and feel, understanding the relationship between minor triads and diminished triads. Learn how to apply diminished triads in a musical example. Guitar: Ibanez AZ Custom. Lehle P-Split. Fender Pro Reverb Amps (2). D’Addario Strings. Pickboy 1 mm TF Signature. BOSS RC-3 Loop Station with BOSS Katana 50 Amp.