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U73b Compressor

Compressor Plugin by Audified
U73b Compressor
U73b Compressor by Audified is a Virtual Effect Audio Plugin for macOS and Windows. It functions as an Audio Units Plugin, a VST 3 Plugin and an AAX Plugin.
Windows 7 - Windows 10
Mac OS X 10.9 - macOS 11
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Faithful and unique emulation of an old German broadcast compressor/limiter unit U73b.

U73b was often used for mastering in European studios between 1960 and 1980. It is an all-tube vary-mu compressor/limiter with an adjustable release time option. Audified kept the circuit exactly as it was originally designed and only added an input and output gain before and right after the compressor circuit to help with proper adjusting of the compression. The plugin effect has been also supplemented with a VU meter and selectable side-chaining.

U73b is great for mastering, mixing drums, bass, guitar, vocals, and voiceovers.

The compressor's controls are very easy, but the effect of this unique device is audible at the same moment you turn it on:

  • Compressor/Limiter switch – the upper U73b knob switches between Compressor mode (Kompr), Bypass (Durchshalt) and Limiter mode (Begr). The compressor mode has a lower threshold setting and a very gentle increasing ratio, in the opposite, the limiter mode provides a higher threshold setting with a higher ratio but still with the smooth knee.
  • Release time – the first three positions offer fixed release time, the other three positions marked with three red labels provide adjustable program content-dependent release time options.
  • IN – adjusts input gain before the compressor/limiter circuit.
  • OUT – adjusts output gain after the compressor/limiter circuit.
  • Sidechain – selects the signal source used for controlling the gain reduction.

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