| 摘要 |
<p>The working principle consists of the circumstance that along with the musical signal, a codified signal is recorded which steadily indicates the percentage of compression on the inlet signal. In the subsequent expansion phase, the codified signal is read in order to quantify the value to give to the expansion and to exactly recreate the initial conditions of the audio signal. This codified signal consists of a tension covering a frequency extent outside of the audio frequency band (ultrasounds), in one point of the characteristic tension frequency still to use, even if dampened, for the purposes of the magnetic recording; a kind of frequency modulated signal which turns out to be proportional to the piloting signal of the VCA.</p> |
