What is the pressure limit?.

Compressor / Limiter (compressor / limiter, referred to as the pressure limit) in the professional audio systems, often set the compression and limited dynamic programming device (or circuit) to prevent system overload or clipping distortion, the device ( .or circuit) is called "pressure limit." .In fact, "pressure limit," is to compress the dynamic range and limit the dynamic compressor limiter dynamic range of equipment together, referred to as "pressure limit." .Is a compressor with the increase of the input signal level to reduce the amplifier gain itself; limiter is a matter of how to increase the input signal level, the maximum output signal level can maintain a constant compressor, but its .Maximum output level can be adjusted. .In general, a large band of music played may have a great dynamic range, playing the music the dynamic range of the height of up to 120dB. .If the amplification of large-scale band, if the requirements to run both to clear out some fine music played a small volume segment to improve the sound system must be properly gain; that when the climax of the music sound system may cause overload and distortion. .This program must be large dynamic compression and set a maximum output level to limit the audio system's dynamics. .If the program dynamically not be compressed and limited, it may be a serious distortion, may also be due to overload and burn speaker or damage to Power. Voltage limiter purpose is to signal the output dynamic range becomes smaller, it makes weaker .larger the larger the signal leaving the signal becomes smaller. .The result is large-signal and small signal difference between the smaller. .For example, the pressure limit can be used to make the snare drum track to become dull and soft, allowing the voice of the drum mixer is raised to a higher level, rather than make the master tape overload. .For some singers, they can not always during the recording well to keep the mouth and the distance between the microphone, this time using some mild compression effect on the sound track can make people perform better. .How it works. .Once the input signal level exceeds the threshold set by the user, the compressor will start working, to reduce the input level is too high. .This result is at the same time increasing the input level, output level will not produce the same result in the increase of amplitude. .For example, set the compression rate of 2:1, each 2 dB increase in input level will cause a 1 dB output level changes. .Important parameters. .Threshold (threshold) parameter determines the need to be compressed, or upper and lower limits of the signal. .The signal is less than the threshold will not be affected. .Ratio (ratio) parameters in the input signal exceeds the threshold, the output level to change ways. .Higher ratio values, will result in greater compression, and makes sounds very "crowded." .Very high ratio values will lead to signal generation extreme "cap component" (ceiling). .This is called extreme (limiting). .Output (output) parameter can be offset by increasing the gain dynamic range of constraints arising from the lower level. .Attack parameter sets the input level of the interaction time. .A long time, prompting the attack before compression "allow access" more of the original dynamic signal. .For example, add a little more under attack time can keep the original kick drum thud. .Release (release) parameter means that when the input signal back to the threshold range, the length of time to pass so that pressure limit to be able to return to normal state. .In the case of a shorter release time, the pressure limit level change is very subtle, can be used to create "waves" of sound. .Disturbing features. .Too much compression will lead to a very narrow sound, and feel very natural sound and will produce noise. .So do not make excessive compression. .Points. .When you use the pressure limit and other effects of the combination, must be as much as possible the effects pressure limit placed on the front line to prevent the mixing of noise in front of the device. .If the pressure limit resulted in a sudden enhancement at a time when you and did not increase the magnitude of compression, indicating that input to the pressure limit of the signal level increased. .* Some music in the 60s used to have the characteristics of the drum, which sounds like something in breathing. .To create this effect, you can use a lot of time with a short release of compression. .* A mix of compression, if the bass drum sound and sustained simultaneously, the bass sound will issue a "pop" sound, as long as a drumbeat sounded, the sound will be heard .to..