Advanced Use
拓展应用
Most analog compressors have a "Side-chain" socket on the back, and now some plugins are offering a
similar facility too. So what's it for?
许多模拟压缩器的背面有一个side-chain(侧链)插口,现在一些插件也包含类似的功能。这个干神马用的呢?
The compressor works by feeding the sound through the compressor itself, but also by feeding the sound
to the compressor "control system".
The control system "listens" to the sound and controls the compressor volume.
压缩器工作是通过经过它自身的声音,也可以是通过它“控制系统”的声音。
声音激发控制系统然后压缩机开始工作。
The side-chain is a system that lets you insert something - like a graphic equaliser for example -
immediately before the compressors control system.
Note this is NOT in the main audio path and doesn't affect the sound as such - just the way the
compressor responds. This system lets you over-emphasise a certain frequency that you want the
compressor to listen out for.
侧链是一个插入式的系统-例如一个图表均衡器-插入到压缩器前面。注意侧链插孔不是在主要的音频轨上并且不会因此
影响声音-它只是控制压缩器反应。这个系统是让压缩器对特殊频段进行反应。
For example:
例如
Example 5: De-essing a Vocal
例5:给人声去齿音
The problem: You have a vocal, but sounds such as the letters "S" and "T" are sounding really harsh, and
burst through the mix too much. You don't want to equalise them out of the vocal sound, because the
vocal sound is actually quite nice apart from those explosive "S" and "T" sounds.
问题:你有一段人声,但是这里面的"S"和"T"听起来太尖锐了,并且在混缩中听起来很刺耳。你还不想去eq(原文也是
做动词用了一下)这个人声,因为除了那坑爹的"S"和"T"其他部分都很完美。
The solution: Using fast "Attack" and quite fast "Release", set the compressor at about 3:1 and then
place an equaliser into the side-chain. Suck out all bottom end, and middle, and apply a boost at around
3 to 6KHz. You will find that adjusting the "Threshold" will control how powerful the "S" and "T" sounds
can get. Overdo it and the vocal can sound very strange. Set it so that it gets the "S" and "T" sounds
just how you like them.
解决方案:用快速的“attack”和相当快的“release”,把压缩比设定在3:1并且把eq插到侧链上。中低频eq掉,并
且在3-6KHz一带做提升。你会发现调整阈值能控制"S"和"T"的能量。如果弄过头了声音会听起来很奇怪。你可以通过这
个让"S"和"T"挺起来更舒服一点。
Note: It is understandable to think that you might need two compressors on a vocal - one to perform de-
essing, followed by another one doing "normal" compression. This is not so. One compressor can do the
two jobs at the same time! Simply compress the vocal as normal. Then insert an equaliser into the side
chain, and apply a small boost around the sibilant region (around 3KHz-6KHz). This will cause the
compressor to over-react on sibilant sounds, thereby de-essing at the same time as compressing. Use the
EQ BOOST to control how much sibilant sounds are CUT.
注意:你可能认为这需要在一个人声上用两个压缩器-一个用来去齿音-另一个正常压缩(前面有压缩人声部分)。事实
并非如此。一个压缩起可以同时做这两个工作的!可以正常的压缩人声。在侧链上插入一个eq,在齿音区做小小的提升
(大概3-6KHz)。这就会导致压缩对齿音产生过度反应,同时压缩齿音。使用eq来控制需要去掉多少齿音。
It is VERY, VERY IMPORTANT not to overdo de-essing. If you do, the singer will sound like they have a
lisp. Or should that be lithp? :-) In any case, once you've screwed it up by overdoing it during
recording, then there is little you can do to rescue it later - so go easy on it! (you can always de-ess
some more during mixing if required).
千万千万不要过度的去齿音。如果你这样做了的话,歌手听起来会像个大舌头。或者他真的是个大舌头?:-)任何情况
下,在录音中你齿音去的不够,你可以稍后在补救-并且是简单的!(你可以在混音时随时去齿音)。
It's important to understand that the equaliser you choose to place in the side-chain does NOT affect
the frequency response of the sound going THROUGH the compressor, just what the compressor internally
LISTENS to. It therefore effects how the overall volume responds to changes in volume at certain
frequencies. This is known as "Frequency SENSITIVE compression". It is also possible to purchase more
complex compressors that actually DO affect the frequency response in different bands, and this is known
as "Frequency SELECTIVE" compression - there is a big difference between the two, although the names are
similar, and even professionals get the two terms mixed up sometimes.
要知道侧链的eq不会影响通过压缩器声音的频段是很重要的,侧链控制的声音只是用来给压缩器自己听的(不是给我们
听的)。因此它作用于整个音量中某个频段的音量。这叫做“频段敏感压缩”。用更多复杂的压缩机对不同频段的频率
进行压缩也是可能的,这就叫做“分段压缩”-它们还是有很大的不同的,虽然名字听起来有点像,甚至一些专业认识
也容易混淆。
The example above isn't the only use for the side-chain - and indeed you don't even have to feed the
same sound into the side-chain as you are feeding into the main input. You could for example feed the
sound of your voice into the side-chain. In that way you can create a system that automatically fades
down music when you speak, and fades it back up when you stop speaking - the same feature that
some disco consoles have - except you have full control over the fade in/out rates using the "Attack"
and "Release" controls.
上面的例子不是侧链唯一的应用-并且你甚至可以不需要把相同的声音发送的侧链和发送的总输出一样。例如你可以把
你的人声发送到侧链,用那种方式你可以做一个在你说话时就把音乐音量压小的设置,并且在你不说话时就恢复到原来
的音量-这在disco里很常见-你可以通过"Attack"和"Release"参数来设置淡入淡出。
In a similar way, you could feed the reverb returns from your lead vocal reverb through the compressor,
but plug the dry vocal into the side-chain. That gives you a system where the reverb fades down when the
vocalist sings, giving quite a "dry" sound, but returns to a strong "wet" reverb inbetween words and
phrases in the song. It keeps the reverb from messing up the vocal in the parts when the words get busy.
Such a technique is also useful for controlling the level of repeat "echo" effects at the end of
phrases.
用类似的方式,你可以把人声混响的returne发送到压缩,然后在侧链里插入人声的干声。这是一个当人声唱起时混响
变小的系统,这给你一个纯净的“干”声,但是在字与字、词与词之间的混响还是很“足”的,这会让在比较快的句子
里的字不会变的模糊(脏,你懂的)。这个技术也可以用在词之后的回声效果上,(人声响时不会有回声效果,没了才
会出现。原理一样)
这一部分压力很大,因为很难理解,我基于自己理解了通顺了才发出来。不足地方多指教多包含!作揖了!!