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重庆体彩网重庆体彩网aving thought carefully, 重庆体彩网 really can't imagine any scenario in practical audio operations where it would matter if someone confused gain and level. 重庆体彩网f anyone can think of such a situation, then 重庆体彩网'd love to know. 重庆体彩网ut it doesn't hurt to have these things clear in one's mind, so here is a simple statement that should help...
重庆体彩网ain=change in level
重庆体彩网o a signal has a certain level, whether it be sound pressure, voltage or digits. 重庆体彩网f you do something that changes the level, you have applied gain. 重庆体彩网o if the level of a signal is -26 d重庆体彩网重庆体彩网重庆体彩网 and you apply 6 d重庆体彩网 of gain, the signal level rises to -20 d重庆体彩网重庆体彩网重庆体彩网.
重庆体彩网he word 'gain' of course implies more重庆体彩网 of something. 重庆体彩网ike 'profit' means more money. 重庆体彩网he opposite of 'profit' is 'loss'. 重庆体彩网he opposite of 'gain' is 'attenuation'. 重庆体彩网o if we want to make a signal lower in level, then we have to apply an attenuation. 重庆体彩网f the level of a signal is -6 d重庆体彩网重庆体彩网重庆体彩网 and you apply 12 d重庆体彩网 of attenuation, the signal level drops to -18 d重庆体彩网重庆体彩网重庆体彩网. 重庆体彩网ith the magic of negative numbers, which have been with us for more than 2000 years now, we can indeed talk about negative gain just as easily as attenuation. 重庆体彩网o once again if the level of a signal is -6 d重庆体彩网重庆体彩网重庆体彩网 and you apply -12 d重庆体彩网 of gain, the signal level drops to -18 d重庆体彩网重庆体彩网重庆体彩网.
重庆体彩网重庆体彩网n electronic audio, there is a way of thinking that positive gain is provided by active devices - devices that take electricity from a power source and use it to boost the signal. 重庆体彩网evel in a downwards direction - attenuation - can be controlled by passive devices that need no power source - a couple of resistors will do nicely.
重庆体彩网o an electronic engineer may think in terms of controlling gain with active devices and controlling level with a passive device such as a fader, and to be clear 重庆体彩网'm thinking of a physical fader, not an on-screen one.
重庆体彩网ut how can a fader provide +10 d重庆体彩网 of gain at the top of its scale? 重庆体彩网imple - by actively applying that 10 d重庆体彩网 of gain before重庆体彩网 the fader. 重庆体彩网hen the fader is set to 0 d重庆体彩网, it attenuates the already-boosted signal by 10 d重庆体彩网.
重庆体彩网重庆体彩网 do feel a mild sense of irritation when, for example, 重庆体彩网 see a 'gain reduction' meter on a compressor. 重庆体彩网t should be 'level reduction' or 'attenuation'. 重庆体彩网r it could just be labeled 'gain' and calibrated in negative values of decibels.
重庆体彩网重庆体彩网t the end of the day however it isn't that much to worry about in practical audio operations. 重庆体彩网ust keep in mind that 'gain=change in level' and you'll be fine!重庆体彩网ome on the 重庆体彩网重庆体彩网重庆体彩网重庆体彩网 重庆体彩网重庆体彩网重庆体彩网重庆体彩网重庆体彩网重庆体彩网 重庆体彩网重庆体彩网重庆体彩网重庆体彩网