加强鼓组音色的冲击力

我们知道,要得到更具冲击力的音色,就要用到压缩器。但你还需要适当调整它,才能让声音真的「动感」起来。

Attack 时间就是核心秘密

注意:最好使用工作室级别的耳机或音箱,才能更好感受到具体效果。

首先,我们来看看底鼓的波形。它会从一个很突然且高频的震动开始,然后相对较缓地结束。开始部分就是冲击力所在的位置。为了让这个部分更加丰满,不失去音色本身具有的冲击感,你就需要尽量让这段波峰无伤地通过压缩器。而 Attack 值就是用来控制这个特性的。

看看下图的底鼓,这是放大到毫秒级别后的波形。我们看到丰满的头部在大约 30 毫秒处开始消逝。这也直接告诉了我,应该怎样设置 Attack 时间。

01

在得到了这个重要信息后,我们在通道条上实例化一个压缩器。将 Ratio 比率设置为 4.00:1,Attack 时间设置为 30 毫秒。然后,循环播放底鼓,同时慢慢拉动 Threshold 值,直到你听见冲击感开始增强了为止。有的人喜欢把 Threshold 压低,有的人喜欢放到很高,只要你感觉合适即可!

当然,Release 也可以适当调调,直到满意为止。

下面从一个具体例子来讲讲。这是一段 Hip-hop 风格的工程。我在底鼓和军鼓轨道上开有压缩器。通过下图的参数,底鼓的冲击力得到了大幅提升。

02

军鼓也可照此方法进行,当然参数会有些许不同。不过在本工程里,我直接拷贝了底鼓的参数,并且觉得没有任何不妥。

让改变更加明显

作为混音技巧,这实在不足为奇,但确实有效。然而这里有个陷阱,需要小心避开:在使用压缩器之后,被修改的轨道可能变得更大声了,造成一种「更大声等于更好」的错觉。

最简单的方法是使用相对增益对比,对修改前后的声音进行 A/B 测试,以确保响度没有较大变化。

例如,可以使用 Maximiser VST 插件,将 Threshold 和 Output 设为相同的值。此数值应该低于总轨混音电平的峰值。例如,压缩前的鼓峰值是 -2.37dB,那么我就将 Loudmax(一款免费的 maximiser)放置在总轨上,Threshold 和 Output 值都设为 -3dB。

现在,当我打开/关闭压缩器时,就既能够听清它带来的冲击力效果,又不会让整体音量失去平衡。

03

听听区别

处理前的鼓(峰值 -3dB,24-bit,41000kHz)

处理后的鼓(峰值 -3dB,24-bit,41000kHz)

本文由 Soundmono 编译自 ask.audio

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