在大、中录音宣,为了录制一个优质节目,往往要多次重录。每录一次就要倒回磁带从头审听或从某一点开始审听,以决定取舍。由于录音机速进、速退的惯性作用,录音员总要几次进退操作才能找到所需要的一点。若拟审点在节目中间,恰巧又是多次重复的乐句,即使找到了这句,由于它是几次重复,也不能肯定正是拟审点。为了能自动、迅速而准确地找到该点,设计了本寻迹电路,可加装在730型录音机上。 In large and medium recording announcements, in order to record a high-quality programs, often repeated re-recording. Every time you record it, you have to rewind the tape and listen to it or hear it from a certain point to decide the trade-off. Because of the speed-up and retreat inertia of the recorder, the recordingist always had to move forward and backward several times to find the point he needed. If the trial in the middle of the program, happens to repeat the phrase again, even if found this sentence, because it is repeated several times, it is not sure that it is intended to test. In order to automatically, quickly and accurately find the point, designed to trace the circuit, can be installed in the 730 recorder.