Beta Tester is an electronic proyect created in 2007 in Madrid by Miguel Calvo-Rubio (green beta tester), Iker Fernández de Pinedo (blue beta tester) and Pedro Fidalgo (red beta tester). Their creations are mostly electronic, based on improvisations practically without producing. Technical equipment: Micro Korg, 2 M-Audio Axiom 61, Fender Jaguar, pedal sampler Boss, Ibanez bass and ethnic instruments.