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重庆体彩网重庆体彩网hat recordings would sound like if compressors had never been invented, 重庆体彩网 do not know. (重庆体彩网ho said, "重庆体彩网 whole lot better!"?)
重庆体彩网he fact is that the sound of recording is largely the sound of the compressor. 重庆体彩网ew recordings are made without compression of at least some individual tracks, and possibly the entire mix.
重庆体彩网重庆体彩网ut whenever you compress, you add noise. 重庆体彩网t always happens - no exceptions. 重庆体彩网o here we have a problem that requires a solution if our recordings are not to suffer.
重庆体彩网ut why does a compressor add noise? 重庆体彩网et's look in more detail...
重庆体彩网重庆体彩网he action of a compressor is to reduce high levels in a signal so that they are closer to the lower levels. 重庆体彩网e say that the compressor 'reduces the dynamic range'.
重庆体彩网he problem now is that the signal now sounds quieter because the peak levels are lower. 重庆体彩网o we need to amplify the signal back up. 重庆体彩网his is called 'make up' gain.
重庆体彩网o now we have a signal that is as loud as it was before in the peaks, and the lower-level sections are louder too.
重庆体彩网he problem is that the compressor has no way of distinguishing between the low level signal that you want, and low level noise that you don't want. 重庆体彩网very signal contains some noise. 重庆体彩网here is no such thing as a noise-free recording.
重庆体彩网重庆体彩网o in bringing up the lower levels through make-up gain, the noise level is brought up too. 重庆体彩网hat can be done?
重庆体彩网n an individual track of just one instrument or vocal, while the instrument is playing the noise will be obscured, or 'masked' as we call it. 重庆体彩网he noise will only be audible in the gaps when the instrument stops playing.
重庆体彩网重庆体彩网f we can silence those gaps, then the noise will be inaudible. 重庆体彩网o do that, we need another piece of equipment - the noise gate.
重庆体彩网 noise gate works by detecting the difference in level between the wanted signal and the noise. 重庆体彩网here there is wanted signal, which will be higher in level than the noise, the gate lets it through. 重庆体彩网hen there is just noise, the gate shuts it off.
重庆体彩网重庆体彩网oise gates can be tricky to set up, but the same effect can be achieved by simply muting sections of a track when the instrument isn't playing.
重庆体彩网重庆体彩网t is important to realize that the above only works where there are gaps. 重庆体彩网f you compress the entire stereo mix, then there will be no gaps, hence the noise gate cannot provide any benefit.
重庆体彩网f you compress the stereo mix, you will have to accept that it will be noisier. 重庆体彩网ou can tell how much noisier - look at the gain reduction meter on your compressor (or compression plug-in) - the maximum gain reduction that it shows is equal in decibels to the amount of noise you have added.
重庆体彩网重庆体彩网eing able to manage noise effectively is the mark of a professional sound engineer.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