UrsaDSP – Boost

Pro Maximizer With An Upward Focus

Coming from UrsaDSP, Boost increases the loudness of audio material. Use it as a signal enhancer during mastering, or to reveal hidden details while mixing or creating new sounds. Set the Output Ceiling, dial in Attack and Release times, and use the main Boost dial to get anything from a gentle increase in average loudness to an all-out smashed-up signal. UrsaDSP Boost applies transparent signal maximization for a professional sound, and thanks to the unique Focus control, you can maximize a signal upwardly, applying more gain to quieter sounds – NO CLIPPING, ever. A Drive control (plus extra Punch setting for transients) are on-hand to add energy and warmth to the signal.


  • Increase average loudness with no clipping and minimal distortion
  • UrsaDSP’s Trajectory Technology detection algorithm maximizes gain at every step
  • Focus control can push quiet sections harder than loud sections and reveal hidden details in audio with up to 52dB dynamic gain
  • Set Input gain up to 28dB and Output ceiling up to 0dB – Boost’s algorithms mean there’s no clipping, ever
  • Choose Attack and Release times to complement your audio
  • Add harmonic distortion using the Drive control
  • Activate the extra Punch setting to add more power to transients
  • Set Max Gain to keep very quiet sounds unaffected
  • Compare signals with the Bypass button

About UrsaDSP

UrsaDSP is the brainchild of Dave Elton, inventor of the award wining Lagrange delay and regular Devious Machines collaborator. UrsaDSP products are now available to buy from the Devious Machines store. Find out more at ursadsp.com.


OSX 10.7 or later; Windows 7 or later. VST 3, AudioUnit and Protools 64-bit AAX. VST2 is not supported.
UrsaDSP – Boost


This is an normalized but unmastered track (DT8 Project – Adrenochrome). Boost increases the levels but keeps the clarity.

Trajectory Technology

Boost can get the most out of any audio signal thanks to Trajectory Technology. Placed at the detection stage of the signal path, this algorithm ensures that the plugin is always achieving the maximum possible gain increase, while keeping the signal transparent and avoiding non-linearities.
UrsaDSP – Boost
“Focus: this is super cool”

Focus: Upward Maximizing

Increase Boost’s Focus control and quieter parts of the audio signal will be processed harder than louder parts. By bringing quiet signals up instead of peak-limiting loud signals, Boost offers a different way to control dynamic range, and can bring out hidden details in an audio signal.


Boost’s unique punch and emphasis controls keep the dynamics even after intense maximisation.
UrsaDSP – Boost
UrsaDSP – Boost

Increase Average Loudness

Boost’s ‘upward maximization’ process is an alternative way to reduce a signal’s dynamic range without simply clipping the highest peaks into distortion or resorting to soft clipping. This method, combined with Boost’s Trajectory Technology, leaves the signal more transparent, and can squash dynamic range even further than most limiters, should you wish.


Focus pushes up the body of the sound so that this track has lower peak levels but higher loudness.

Reveal Hidden Details

Boost can restore elements that have been suppressed by heavy-handed mixdowns or during the mastering process. In mixing, use Focus to bring out reverb tails and mechanical noises that were previously too low-down in the mix. Sound designers can find inspiration using Boost to put a new spin on existing audio, transforming loops, breathing new life into vocals, and bringing out a new focus in acoustic instrument recordings.


Here, the bell like lead sound is enhanced using Boost as an insert effect to increase the reverb, whilst lowering it’s overall peak level.


Boost is only applied to the drum track, quiet details and punchiness are both being enhanced.