The American 5 Dynamics, originally released in the 70s, is a fet feedback type compressor. Equally useful as a tracking, mixdown or program compressor/limiter, the A5D utilizes "vintage" dynamics control and an easy to use multi-function control set. It delivers dynamics control behavior unlike VCA feed forward compressors so common today. American 5 Dynamics makes use of the 2510 and 2520 op-amps and manages to sound clean but with character without being weak and harsh.
What’s in the library programs
- N·Ai (Neural Adaptive intelligence) Proprietary Technology in Sampling
- 4 sample rates: 44.1 - 48 - 88.2 - 96kHz
- Nebula4 setups with program change
- Nebula4 and Nebula3 ALEXB skin
Spec.
- Compressor 2:1 and Limiter 20:1
- Stepped release time: 0.1 - 0.5 - 2 - 2.5 sec.
- Internal sidechain High Pass filter
- External sidechain control (Nebula4 VST3 only)
- Dry/Mix continuous control
- NLD:
(Non-Linear Drive) controls how much the input signal drives the system into its non-linear region, adding harmonic content.
This program library works in licensed Nebula3 and Nebula4, NOT Nebula3 1.3.505 or N4-Player
Note for MAC users:
From Acustica Audio: "After several tests, we have detected that our products do not run correctly in the Rosetta 2 mode and we recommend using always application with a specific build for Silicon computers."
To use ULTIMATE libraries on MAC computer you need to upgrade to Nebula 4.5 (rev. April 2022) also.

A5D N·Ai DEMO
Download and try the program demoIt works with all Nebula3 and Nebula4 versions
Some restrictions are present compare to full commercial program.