Processing audio has never been easier thanks to FIRE, the series of single-knob plug-ins from Acustica. The aim of this series is to create an ‘easy-to-use’ product line that encompasses Acustica’s top quality alongside very intuitive use with just a few simple clicks! The FIRE series plugins will make your life easier and help save you time!

Fire The Bus+ is the brand new Acqua plugin in the Fire series giving a uniform sound to your entire mix or master, thanks to its ability to 'glue' all of your tracks together, creating a cohesive, overall timbre to your bus with just a few clicks and very subtle settings.

The choice of compressor model from the four available, each one based on our ‘Hyper’ compression tech, will greatly impact the tonality and timbre of your mix or master. The result you will get using this quick and easy-to-use plugin is a full sound, pleasantly round, controlled bass, and with the presence of an adjustable high pass filter, it will allow you to rule out any unwanted pumping. Try it even on single tracks; you won't regret it.

Fire The Bus+ GUI

Fire The Bus+ is the perfect choice for those who seek a Bus compressor with musicality, ease of use, low CPU consumption and an analog feel above all.

Main features

• Four custom bus compressor modes available (BUS – BS7 – VIO – MAG).
• High-quality oversampling, up to 4x with perfect phase response.
• Dry-Wet control.
• Combined Time (Attack-Release) control.
• Output Level slider.
• Threshold control.
• Sidechain HPF control.
• Low CPU consumption.
• Low latency.
• Up to 4x oversampling.
• Resizable interface.*

*Choose between 3 magnification values (1x - 1.5x - 2x) from the top left ▼SIZE drop-down menu.
Once the desired size is selected, the plug-in must be removed and re-loaded to apply the changes. This action affects the currently selected plug-in. New instances of the same plug-in will open with this magnification.


Mode: 4 selectable compressors*:
BUS Derived from a vintage Vari-mu vacuum-tube compressor with a hugely valvey character.
BS7 Derived from an American all Class-A vacuum tube compressor. This is a very clean, open, detailed and highly-transparent compressor. It does have some character, including a gentle smooth sound. It is able to make tracks sound bigger and it can be used more aggressively when needed.
VIO Derived from a British Vari-mu 'soft-knee' valve compressor with a deep, dynamic character and the ability to offer air in the high frequencies. Some typical applications include vocals, bass, and of course, the mix bus.
MAG Derived from an American Vari-mu vacuum-tube compressor. Its main use is to bind the elements of a mix, what is called the 'Glue' effect while maintaining transparency, warmth, and detail.

*Each compressor has 1x, 2x, and 4x oversampling modes.
The compressor modes included in Fire the BUS+ are based on our ‘Hyper’ compression tech. These new ‘Hyper’ tube compressors give faster and more accurate compression with less CPU consumption.

Att/Rel slider: Adjusts the two parameters simultaneously to offer the user a choice of the most useful settings without any problems. Reducing the release time automatically increases the attack time and vice versa (increasing the release time instantly reduces the attack time for a softer, 'spongier' feel).

Out slider: A makeup control up to +12db.

'Magic' Knob Sets the threshold of the compressor (range: -40 dB to 0 dB).

FLT slider Is the sidechain high-pass filter.

Mix slider This controls the proportion between the original (dry) and ‘effected’ (wet) signals. In short, it determines the balance between the compressed and uncompressed signal.

Oversampling drop-down menu: This menu allows you to change the oversampling rate to improve the audio quality increasing the sampling frequency of the plugin and minimizing
aliasing artifacts:
• The 1x mode bypasses the oversampling functionality.
• The 2x mode increases the sampling frequency of the compressor being processed
by a fixed multiple of 4x.
• The 4x mode increases the sampling frequency of the compressor being processed
by a fixed multiple of 4x.

New Hyper engine

Our standard compressors run at 22kHz regardless of sample rate or oversampling; this implies that the reduction, attack, and release curves are not calculated for every sample but for every 'n' samples, where 'n' depends on the sample rate. For example, on fast transients, the input level is evaluated correctly; however, the reduction is calculated after 'n' samples, so the signal containing the transient is not compressed in time, and the transient "escapes" compression.

Now, our Hyper compression tech calculates the amount of compression and the attack and release curves at each sample, so compression is applied immediately and no longer after 'n' samples.
The speed of these new compressors can be further increased by oversampling while keeping the power consumption at 1/12th of our standard compressors.

Fire The Bus+ video demo

Technical information:

• Plug-in format supported: VST2, VST3, AAX, and AU.
• Available sample rates: 44.1, 48, 88.2, and 96 kHz.
• Windows 10, and 11 compatible.
• macOS 10.15, 11, and 12 compatible.
• Intel, AMD, and Silicon M computer compatible.

Price and availability

List price: €69 Buy Now

The product is at an introductory period for the first four weeks after release or until the first official version is released; this implies that the product may receive improvements, changes, or fixes available through Aquarius Desktop updates.

How to install the free 30-day trial
Note: Fire The Bus+ trial version includes 44.1 - 48 - 88.2 - 96 kHz sample rates.
Please remember that trials expire 30 days after authorization, and we strongly recommend not using trial products in commercial sessions or any important project.

Fire The Bus+ user's manual

FIRE SERIES web-page:

FIRE THE BUS+ web-page: