While the reduction in volume is nearly-instantaneous, the " Release time (s)" slider determines how long it takes the Limiter to return to 0 Decibels of Attenuation. The " Input Gain (dB)" slider determines how much the Levels are increased before they reach the Limiter, and the " Attenuation (dB)" meter on the right-hand side shows how much the Levels are being reduced at any given moment. The Fast Lookahead Limiter literally "looks ahead" in the signal by a few milliseconds, and when it sees that the signal is about to go over the limit you have set, it automatically turns the Levels down. To set how much the Fast Lookahead Limiter limits, simply adjust the " Limit (dB)" slider. The " Fast Lookahead Limiter" can be found among the LADSPA Plugins. Limiters are almost always used Post-Fader. A Limiter can be used on the Master Bus to prevent the overall Mix from Clipping.
Many Limiters have the option to boost the Levels of the incoming signal before they are Limited, and in this way you can "close the gap" between the loudest and quietest parts of your Mix. LimitingĪ Limiter is a tool that prevents the volume of a Track from going over a certain Level, usually the Peak Level (0dB) or something close to it. There are several types of tools for adjusting the Dynamic Range available as LADSPA Plugins within Ardour, including Limiting, Compression and Gating. These are all problems with what is called the Dynamic Range, i.e., the difference between the loudest and quietest parts of your Session. You may set the Levels so high that they clip, or you may add unwanted background noise by simply turning Levels up.
This kind of problem cannot be easily solved using Faders to adjust the Levels alone. One of the problems you may encounter in a Mix is that the loud parts are too loud, but the quiet parts are too quiet.
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