Computer Tuning System
As commonly known, cassette tape has quality variations even in the same kind supplied under the same brand. To make the most of its recording potential, an optimum value has to be selected for each of bias current, tape-referenced recording level and equalization. What should be noted here is all of these bias, level and equalization have correlation. For example, when equalization is varied an optimum point of recording level is shifted, and likewise if level is moved an optimum bias amount changes. Therefore, to create the flattest possible frequency response, not only an independent adjustment is needed on each item, but also overall correlative calibration should be performed among the bias, level and equalization.
In the case of cassette deck featuring automatic calibration system, the on-deck computer calibrates all of these 3 items individually then correlatively to locate the optimum points, confirming the result of each calibration step in the form of frequency response. In this way, the best combination point is selected among millions of different combinations. In addition, the bias fine-tuning control enlarged the listener's scope of recording and listening pleasure.