Prismatic Compressor & Mastering Limiter

What is the DSM V2?

A compressor and mastering-grade limiter. Better than any multiband.

In 10 seconds or less, you can play a track, press the Capture button, and start achieving super-smooth compression with all the familiar compressor controls.

7 Highlights of the DSM V2

1   More than 3 times as many frequency bands as conventional multiband compressors, with particularly fine resolution in the mids and highs, where the lion's share of character and vocal timbre are formed.

2   Proprietary Capture System uses both spectral and dynamic information to obtain a Threshold Curve. Thus, programme compression and de-essing is performed with reference to a credible, authentic frequency response.

3   Super-smooth, resilient compression. Large dynamic events and spectrally complex percussion are compressed with ease. Out-of-character tonal changes are avoided, even under heavy compression.

4   Capture the signature sound from one track and dynamically impress it upon a different track. The Dynamic Spectrum Mapping of the DSM V2 lends a more believable result than the old matching EQ method.

5   Transients are kept intact, never smoothed-over. The importance of this cannot be overstated, and is where many "spectral" audio processors end up ruining your mixes. The DSM V2 always keeps the punch and detail intact.

6   Mastering Limiter is 100% transparent below -1dBFS. This means the Limiter only processes the peaks, leaving everything else untouched. Again, all transient detail is preserved, even above digital maximum. In addition, the new output Master Gain control in V2 provides post-limiter headroom.

7   Parallel Compression is also new in V2 with the Dry/Wet mix control.

The DSM V2 tackles common tasks

  • Mastering.
  • Loudness enhancement.
  • Continuity matching.
  • Vocal timbre treatment.
  • De-essing.
  • Character mapping between whole mixes, tracks, vocals & instruments.
  • Sound character control for broadcast playout.
  • Microphone proximity correction in video or film production.
  • Improving difficult outside broadcast situations in post-production.

DSM V2 in Greater Depth...

Dynamic Spectrum Mapper V2

Keep Your Mixes Alive

The DSM V2 has many exciting spectral compression capabilities – we'll get to those soon – but there is something very important we'd like to say first.

Once the transients in your track have been smoothed-over by an audio processor, they are gone forever. You'll never get the original life and energy back, no matter what. Plugins that operate on frequency bands are notorious for this.

However, the DSM V2 keeps the transients intact, thanks to highly accurate time-domain envelope processing. We engineered it that way from the ground-up, because it matters even more than the number of frequency bands.

Explosive, subtle percussion – original  (mp3 file)
Compressed with the DSM V2  (mp3 file)

Capture Immediate Results

The Capture System is the heart of the DSM V2.


The missing dimension in all conventional compressors is spectral and dynamic information about the audio programme. The DSM V2 compresses to a spectral threshold derived from the track being processed, or any other reference track.

During audio playback, press the Capture button once to capture the spectrum, or press and hold to capture an average spectrum over time.

The resulting Threshold Curve is the threshold for the Prismatic Compressor. The compression threshold for each band gets set, without guesswork.

Effortless Natural-Sounding Compression

Because the Threshold Curve is obtained directly from the audio programme, the DSM V2 always compresses to a natural and believable frequency spectrum, and prevents unwanted tonal changes, even under heavy compression.

This means the DSM V2 can sympathetically handle programme over a very wide dynamic range, without many of the usual compression artefacts. Even large percussive events, which badly defeat conventional compressors, are handled with aplomb.

Progressive Spectrum Mapping

Like all compressors, when the signal exceeds the threshold, gain reduction is progressively applied. But because the threshold in the DSM V2 is a spectrum (the Threshold Curve), as the signal exceeds it, the spectral response becomes more strongly imprinted.

Parametric Threshold

Parametric Threshold

The Parametric Threshold is not an EQ, but rather it superimposes an EQ-style frequency response onto the Threshold Curve, to which the programme is then compressed as usual. The Parametric Threshold is non-destructive, so you can experiment freely on your Threshold Curve presets.

Capture — Modify — Apply

Many creative compression possibilities can be rapidly explored with the DSM V2 using the following 3-step workflow. We'll assume you have two tracks to hand, Track A and Track B:

1. Capture. Whilst playing Track A, capture a Threshold Curve.

2. Modify. Use the Parametric Threshold to optionally modify the Threshold Curve in a flexible, non-destructive way.

3. Apply. Now play Track B: The spectral response from Track A is impressed upon Track B, but in a more dynamic, musical and expressive way than merely using fixed equalisation.

Loudness Maximisation

The DSM V2 squarely addresses the pivotal role of frequency response on perceived loudness. For example, capturing from a bright-sounding passage and applying that Threshold Curve to the whole track will confer a forward, in-your-face quality, but without excessive compression. A psychoacoustically engineered approach to loudness maximisation is now possible.

Bigger Than Life by Josh Fields  (mp3 file)
Enhanced for loudness using the DSM V2  (mp3 file)

Vocals and De-essing

Due to the internal fixed frequency band arrangement, which naturally provides more bands of processing in the mid and upper ranges, the DSM V2 is particularly well suited to vocals. In particular, it's a smart tool for de-essing.

Frequency Spectrum Display

Simply capture a Threshold Curve from a good part of the performance without any "essing", and adjust the overall Threshold level until the sibilance is supressed.

This is a holistic approach to the problem, rather than the conventional way of attempting to surgically cut out the offending frequencies by trial-and-error.

Multi-Dimensional Capture (Advanced)

There's more to the DSM V2 Capture System than just taking a snapshot of the spectrum. Engineers wishing to explore highly nuanced compression effects will benefit from understanding how the Capture can be "tuned" to the programme dynamics.

The key point is that the spectrum displayed for each channel is accurately pre-processed by the timing parameters (ie. Attack, Decay and Timing Profile), and this directly influences the Threshold Curve obtained when the Capture button is pressed.

Timing Parameters

For example, with slow Attack and fast Decay settings, if you take a new Capture then the Threshold Curve will tend to represent the steady-state background spectrum and ignore transient peak information. The other extreme, fast Attack and slow Decay, will add transient spectral information to the captured Threshold Curve, which could be useful if you just want to compress the peaks.

Natural Match

Leaving the timing parameters untouched after capturing a Threshold Curve will provide a natural match between the Threshold Curve and the compression action. What we mean by this is that the programme's dynamics are informing both the captured Threshold Curve and the compression in exactly the same way.

However, it's worth pointing out that once a Threshold Curve has been obtained, you are free to deviate from the "natural match" described above and choose entirely different timing parameters for the compression itself. Only the DSM V2 can offer this type of multi-dimensional creative control.

Parallel Compression

The Dry / Wet control offers a balance between the processed and original programme, providing an easy way to achieve parallel compression.

Mastering Limiter - Transparent Below -1dBFS

Additionally, the DSM V2 features a single-button Limiter of mastering-grade quality. The Limiter has been optimised to work seamlessly with the Prismatic Compressr, and allows short-term peak events in the programme to exceed maximum peak modulation levels without causing overs or loss of impact.


The DSM V2 Mastering Limiter boasts complete transparency for levels below -1dBFS. Furthermore, all transient detail is retained, even above digital maximum.

The post-limiter Gain Out trim control is provided so that headroom can be maintained without the need for an additional gain plugin.

Video Demonstration

Watch the Introduction to the DSM V2, narrated by its designer, Paul Frindle.

We invite you to judge how the DSM V2 performs on the most challenging tasks you're working on right now.