The R7 and D7 were dedicated to reverb and delay respectively, the M7 dealt primarily with modulation effects, and the F7 majored in digital filters and EQ. Having made a name for themselves in the world of music technology with the acclaimed D7, R7, M7 and F7 single‑effect units, Sony are making another foray into the world of studio outboard gear with the DPSV77 multi‑effects processor. Is it a smash success or a one‑hit wonder? Nick Magnus goes for gold. Sony's DPSV77 is like a 'best of' compilation of all the company's dedicated single effects units, with the addition of a simplified user interface and a digital I/O.