The original LA2A unit was actually a Limiting Amplifier. LA2A is a tube-based compressor and uses Cadmium-Sulphide as a resistor. Lawrence II, founder of the Teletronix Engineering Company. LA2A was the first-ever Optical compressor. The intensity, in return, determines the amount of compression. The input level controls the intensity of the illumination source. Different compressor types use different Variable amps.Īn optical compressor uses a photoresistor along with an illumination source. The input signal in a compressor splits into 2 copies, one is goes to the variable gain amp, while the other works as a sidechain signal. With the advancement of technology, now we have access to a variety of Optical compressor units in VST, AU, and AAX formats. However, the reason for its popularity was also because of its cheap price and low maintenance. Its unique color, soft character, and warm compression effects make it one of the most used compressors.ĭuring the earlier days when hardware compressors were widely used LA2A, an optical compressor was the most used unit. Optical compressors are one of the most used units in the mixing process. In this article, we will tell you about the top ten optical compressor VSTs.
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