Type A

AudioThing Type A - Vintage Enhancer Plugin - Dolby 361 A-Type Emulation (CAT 22)
Type A Vintage Enhancer

Type A is a plugin inspired by a famous vintage tape encoder. The original unit was designed to be a noise reduction system for tape recording (encode stage) and playback (decode stage).
Type A emulates the encoding stage, which was often misused as an enhancer, dynamically increasing the top end of a signal without introducing artefacts or altering the harmonic content. The results are similar to a dynamic EQ which adds presence and air to any track in a natural way.



Vintage Enhancer
Multi-band Compressor with 4 Bands
Adjustable Unit Noise
Oversample up to 16x
Resizable Window
Preset system with randomizer
Formats: VST, VST3, AU, and AAX (32/64bit)
Platforms: OSX, Windows
Download Manual (.pdf)

  • Dolby 361 CAT 22 - A-Type
  • Dolby 361 CAT 22 - A-Type
  • Type A Scheme
PC Demo MAC Demo
In demo mode the plug-in will output silence for 3 seconds every 45 seconds.

Minimal Requirements    

Windows XP SP2 / OSX 10.7
Intel Core 2 Duo 2GHz or equivalent
2 GB RAM / 500 MB HD
Screen resolution: 1024×768
VST, VST3, AU, or AAX 32-bit or 64-bit host

Dolby 361 Noise Reduction - Buttons
How does it work?

To limit the amount of noise generated by tape recording, early noise reduction systems used what’s called a multi-band compander (compressor/expander). The unit dynamically emphasises the high frequencies during the encoding stage (recording to tape), so that during the decoding stage (playback from tape) the signal is attenuated, along with the typical tape noise. Type A emulates the encode stage only.

The input signal is split into 4 bands (with the highest bands overlapping), dynamically compressed and then summed back with the direct signal. The amount of compression on each band is inversely proportional to the volume of the band. Quieter sounds get brighter while louder sounds remain almost unchanged.
This adds brightness and air without generating any new harmonic content or distortion, resulting in a more pleasant and natural enhancer compared to a typical exciter.

AudioThing Type A (Panel 2) - Vintage Enhancer Plugin - Dolby 361 A-Type Emulation (CAT 22)
You can show/hide the second panel by clicking on the cog icon next to the bypass button.

Volume for each band
Compressor Attack and Release
Noise volume
VU-Meter source selector


Altar by Zutsuri (c) copyright 2017 Licensed under a Creative Commons Attribution (3.0) license.

Type A is not affiliated with, sponsored, nor endorsed by Dolby Laboratories, Inc.