Eumig introduces a :new concept" in quality cassette decks for in-home and professional use with the Eumig Metropolitan Concert cassette deck.. The unit uses a unique opto-electronic servo system for "ultra-precise" control of the capstan drive. Instead of belts and flywheels to turn the capstan, the Eumig makes use of a ligtweight disc that is photo-etched with 2500 precisely spaced radii to create 15,000 pulses per second as the capstan rotates them past an optical sensor. By comparing the counted pulse-rate against a fixed reference, it's possible to apply continuous speed corrections to the capstan motor in a matter of mere microseconds. The result; wow and flutter is reduced to an extraordinarily low 0,05% WRMS, according to Eumig. The deck has three heads and a solenoid logic tape transport. Peak recording level is indicated by two parallel columns of LEDs; since these are inertia-less, they supply instant values, unlike the much slower ballistic type VU meters. There's a mixing panel to handle two inputs per channel with automotive or manual level control. The CCd also uses three LEDs to indicate the type of tape. Bias and equalizataion switching for chromium dioxide tape is automatic. Signal-to-Noise ratio with Dolby is 66 dB for ferric-oxide, 68 dB for CrO₂ and 72 for ferichrome tapes.