DOI link for Controlling levels
Controlling levels book
We have earlier emphasized the necessity of not allowing programme (signal) levels to exceed certain limits, and we have shown that the right type of meter will indicate when maximum levels are being approached. What we have not done is to explain how to avoid undesirable excursions of the signal, either into the noise regions by being too low or into distortion by being too high. What is more, the process of keeping the signal within limits must be done with the listeners’ requirements in mind. In some cases, the prime need will be to maintain what we might term ‘artistry’ with the preservation of at least an illusion of a good range from loud to quiet, in others there may be a different requirement. Cassettes to be listened to in cars probably ought to avoid very quiet passages which would not be heard above wind and engine noise. (Equally, classical CDs with a wide dynamic range are often a waste of time in cars – unless the engine is abnormally quiet and there is almost no wind noise!)
In some professional circles, the term ‘control’ is used to mean the setting of the level – control of the signal voltage, if you like. We will use the same term here.