【 Weak current College 】 compression using methods---Power By 【 China power house network 】

The use of compression methods
Compression for dynamic control devices as a system, it is no Equalizer effect for actuator and other equipment so obvious, so everyone in regulating it often start or fails to confirm whether it will really play a role should be played. Here I describe their own experience to share.
Compressor for a major operation parts: 1 compression ratio RATIO, this concept is to set a percentage in the compressor unit started working time, output level and input level is not increased in accordance with the same proportion, but according to the proportion set by the compressor. Such as compressor compression ratio is set to 2: 1, input level increase of 10 DB, output level only increased 5 DB, if compression ratio is set to 10: 1, the output level of the input level increases, the compression ratio to 1: 1 when the compressor is equal to passthrough. Generally speaking, if the compressor is used in protection equipment, compression ratio set in 6: 1 to 10: 1 or even infinity, but use a microphone, such as preventing some loud guy sings out broken sound, set in a 2: 1 to 4: 1. 2. start level THRESHOLD, its role is to set a level value, when the input signal level falls below this value, compression is equal to the passthrough, input signal level is above this value, it starts from the compression, the output level set compression ratio output to subordinate devices. Set the start level after level equipment in General, in accordance with the carrying capacity, if the back-level devices such as power amplifiers of the allowance is not large, you can set the starting level is low, if the back-level equipment allowance, you can set a little higher, as a protective device to use, you can put in front of the mixer's output adjustment to normal levels, and then adjust the start level knob, general security level devices such as power amplifier of signal led does not light (CLIP). 3. start time ATTACK TIME, this function is to decide when the compressor input signal detected above the starting level, to the compressor start work time, the shorter the time set, the compression on the signal, the faster but the effect on the signal, also reflected, as compared to the quick launch, when the compressor start work, head of General bass sound soon to die out, bass like powder. Slow boot times, compressor on signal response is relatively slow, but the damage to the signal dynamically. Start time speed on impact of low-frequency signal is relatively large, too fast can cause bass divergence, so if you feel the high frequency of sustainability is no problem, due to slow down the startup time can get a clear and powerful bass, I usually turn the knob is set in the 3 o'clock position. If high-frequency response, I in general settings in the 9 o'clock position. If the ear tubes, you can compare side-don't listen to, and drop a bass plump, clear CD push big mixer signal, so that compression is started, and then from fast to slow gradually turn clockwise starting time of knobs, when bass voice becomes strong and clear, you can. 4, recovery time RELEASE TIME, said the input signal is greater than the starting level, compressor start to work, and when the input signal level is below the starting level, the compressor to revert to the express condition that express from working state recovery state, the time interval is the time to recover. In General, if you need a larger dynamic range, such as DISCO, recovery time suitable to hurry up, this signal fluctuation is relatively large, the drums sounds clearly, if the recovery time is slow, the compressor is easy as it seems "breathing space". Reduce recovery time of method and reduce startup time instead, general regulation from slow to fast. Comprehensive statement that summarize the above, the compression ratio settings: protection of 6-10, the effect of 2-4; boot-level settings: don't let the power amplifier and a red light, usually in the-10 to + 6; start time setting: for bass in three points, 12 points in for baritone, treble in 9 points, general-purpose 12 points recovery time setting: 9 for bass, baritone 12 points, 3 points for the treble, universal 12-point output output settings.