Dmg Compassion Sound On Sound

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STOP! Before you go plugin shopping, specifically for compressor plugins, take a look at this loving review by Gary Hiebner on Compassion by DMG Audio.

With so many plugins on the market—especially compressor plugins—how do you choose the perfect one? DMG Audio's Compassion has made this choice much easier. They have developed a plugin that could be the only compressor you’ll ever need. It has everything from analogue emulation compression to modern sounding compressor types with advanced circuit algorithms, and more. I will cover some of the features of this unique compressor plugin in this review. With so many features this is a plugin that you will never get bored of. Every time you use it there's potential to learn something new.


Step 1 – What Makes this Plugin Special


The Compassion compressor is packed full of tools. It has compression, expansion/gating, side-chaining, transient shaping, and limiting capabilities. Which makes this more than just your average compressor! What makes this plugin very special is its visual graph aids. There is an audio window display that shows the waveform and the compression effects on the audio signal. This comes in handy when customizing the attack, release, threshold and ratio via the waveform. You get real-time visual feedback via the waveform graph that is in my opinion the biggest selling point with this plugin.


This visual guide will really help novices get their head around how compressors actually work and how they affect the audio signal path. I remember not quite understanding compressors when I first got into computer music production. It took quite some time until it made sense. Now with these visual aids, Compassion will really assist the beginner, and its advanced features will entice the intermediate to advanced user as well.


Step 2 – Presets/Modifications

Compassion comes with a few nifty presets, but what is very interesting is its Mods feature. Mods are a form of preset but with more configurable options. You can alter specific parameters and save them as a modification. This is a different way of looking at presets and is where you can find some of the compressor emulator modifications. The Mods are broken up into Characters, Compression Styles, and Utility functions.


You can also save your own Mods for later use.


Step 3 – Advanced Mode

Here in Advanced Mode you have access to many more features that allow you to tweak your compression settings further such as the shape of your attack and release curves. For example: you can reshape your Knee in the graph.


You can even dial in negative compression values, which can completely change the way your compressor reacts to the audio, giving it a gradual increase to the threshold.


Step 4 – Transient Shaper and Side-Chain

The Transient shaper is very handy: after most compression you can lose some of the edge to your sound. The transient shaper will help bring back some of that edge. With the Advanced Section you can further tweak the transients.


The side-chaining features are amazing. There is an EQ section with high and low-pass filters with adjustable slopes, plus bell peak types. You can also add noise into the side-chain for more analogue response. Plus, there is the option for an external source as a side-chain source.


Step 5 – Preset Examples

Here are some audio examples so that you can hear the results of Compassion. I have used the presets that have come with the plugin. But so much more is possible with it.

Here is an example of the Bassline Smash preset on one of my synth bass lines.

Before:

After:



This is the Drum Transnap preset before on a Kick sample. You can really hear how the Transient Shaper affects the attack of the Kick.

Before:

Compassion

And after:


Here is the Drums Bus preset on the drum channel of my one track.

Dmg Compassion Sound On Sound Effect

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And after:


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There is also a Bus Compression preset called Main Bus. Take a listen how it affects the track.

Before:

After:


Compassion can also be used for creative processing: I have dialed in some settings using the Transient shaper and some of the other parameters in the compressor. Take a listen how it alters the sound quite drastically. You see how it can be used as an effect as opposed to a corrective tool on your audio.

Before:

After:


Conclusion

We're just scratching the surface of what is possible with Compassion. There are many other features to this compressor plugin. But once you get deeper into it you will find these hidden ‘gem’ features. I hope this demystifies some of Compassion’s interface and shows you some of the possibilities of this amazing plugin.


EQ & Compression Plug‑ins

DMG Audio's innovative plug‑ins combine friendly interfaces with an amazingly comprehensive feature set. Could they be the only EQ and compressor you'll ever need?

Dave Gamble's CV reads like a Who's Who of digital audio. His code has powered plug‑ins from the likes of Focusrite and Sonalksis, but for his latest plug‑ins, he's chosen to go it alone. EQuality and Compassion are, respectively, an equaliser and compressor, and are available in all the major plug‑in formats on Mac and PC. This includes VST3, which means that external side‑chaining is supported in Compassion.

The Universal Equaliser

Dave's goal in developing EQuality has been to create 'a great replacement for all your EQs”. In other words, it's designed to be of sufficiently high quality to be used as a master or bus EQ, yet with a low enough CPU load that you could also use it on every channel of a mix. A lofty goal, indeed!

Certainly, no‑one is likely to find EQuality lacking in the flexibility department. To its four fully parametric EQ bands are added low and high shelving equalisers (which can be switched to bell mode), plus one low-pass and two(!) high‑pass filters. The entire plug‑in can be run in one of five processing modes: the standard Digital, the superior Digital+, plus Minimum Phase, Analogue Phase and Linear Phase. Both conventional stereo and M/S operation are supported, and there are some unique bells and whistles too. The resonant frequency of the shelving equalisers can be separated from the turnover frequency, so that at high Q values you can position the resonant peak exactly as you want it. You can also freely adjust the amount of interaction between gain and Q values, to mimic the behaviour of some analogue designs whereby the bandwidth gets sharper as more boost or attentuation is applied.

Dmg Compassion Sound On Sound Effects

The attention to detail extends to the user interface, which boasts a number of clever features. As expected, you can drag the EQ points around with the mouse, and you can also Ctrl‑click and Shift‑click to bypass them and adjust their bandwidth respectively. Metering is also informative and highly configurable. EQuality's metering is highly configurable.Less usually, there's a Range slider that lets you scale the response of every band simultaneously, so you can retain the overall 'shape' of your EQ curve while experimenting to decide how drastic you want it to be. Another neat touch, which I've not seen before in an EQ plug‑in, is the horizontal frequency-shift slider, which allows an existing curve to be moved up or down the frequency spectrum.

Dmg Compassion Sound On Sound Bar

The curve itself is drawn very clearly, and you can switch in a detailed spectrum analyser if you want to see the effects of your work in real time. Alternatively, if you prefer not to be distracted by visuals and instead concentrate on how it sounds, you can switch off the graphical display entirely and just use the rotary controls.

My first-choice EQ plug‑in of late has been FabFilter's Pro‑Q, and in use, EQuality struck me as having a lot in common with that excellent equaliser. In both cases, much thought has gone into designing an interface that works well in a DAW environment, rather than mimicking some classic piece of analogue hardware; and in both cases, the results are a resounding success, although I don't think that EQuality's GUI quite approaches the slickness of FabFilter's offering. Here, all the EQ bands and their associated controls are always visible, which makes things a little busy by comparison, and because their respective colours don't quite match, I sometimes found myself losing track of which EQ 'blob' corresponded to which set of controls. Nevertheless, it's still a joy to use for the most part, and the Scale and Range sliders are great additions.

In sonic terms, meanwhile, I think it also bears out its maker's claims for it. The basic Digital mode is not quite as smooth as Pro‑Q's default mode, but is probably less CPU‑intensive, and definitely a step up from the EQs bundled with most DAWs. However, I found myself using it mainly in the other processing modes. Digital+ seems a little more focused than the basic mode, while Analogue Phase seems somehow 'softer' and kinder to the source material. On the master bus, I thought the extra CPU load of Linear Phase mode was well worth while, bringing a noticeable extra degree of clarity to the proceedings. I would certainly be very happy to use EQuality as my only EQ on a mix.

Sympathy For The Level

EQuality is undoubtedly one of the more comprehensive equaliser plug‑ins around, but Compassion makes it look positively Spartan. Dave Gamble has thrown the kitchen sink at this one, and followed it up with the dishwasher and tumble drier. So bristling is it with features, in fact, that even summarising them would take a lengthy couple of paragraphs.

In essence, Dave's aim has been to create a single compression 'engine' so flexible that it can be tweaked to behave like almost any hardware compressor, as well as doing a great deal that no hardware unit can. To take but a small example, many compressor plug‑ins let you adjust the extent to which the left and right side‑chain signals are summed, to control the degree of stereo linking, but Compassion goes several extra miles. To adjust the stereo linking, you move two dots around on an X‑Y graph, which allows you to set a separate L/R sum for each channel of the mix. You could even set one channel's side‑chain to be influenced only by the opposite channel's signal if you wished, an idea that raises particularly interesting possibilities in Mid/Side mode (which is, naturally, supported).

Likewise, side‑chain EQ is a common feature of dynamics plug‑ins, but not as implemented here. To mimic the behaviour of some analogue compressors, you can bleed noise into the side‑chain signal, either pre‑ or post‑EQ; you can also combine internal and external side‑chain signals. On top of that, there's a second pair of high- and low‑pass filters that sits in the signal path itself, and, optionally, the side‑chain path as well. You can even choose to have the compressor act only on the filtered signal, leaving the rest of the audio alone, enabling Compassion to be used as a dynamic equaliser or a sophisticated de‑esser.

The attack and release parameters, meanwhile, are almost absurdly configurable. You can specify a 'curve law' that modifies the 'shape' of the response to transients, decouple and reverse the order of the attack and release circuits, and introduce a Hold parameter to delay the onset of the release phase. There's also an adjustable auto‑release algorithm. Should the transients themselves be disobliging enough to escape the attention of the main compressor circuit, you can also engage a fully specified transient shaper and peak limiter, each of which has more parameters of its own than some dedicated plug‑ins do.

The behaviour of the threshold and ratio parameters can be tuned in yet more different ways, some tailored towards the possibility of mimicking typical analogue circuits, others offering advanced dynamic control. A variable knee control is joined by a Bleed parameter, which can help create a Dbx‑style 'over easy' effect, plus a Hysteresis parameter that offsets the threshold values for the attack and release circuits. You can specify a Ceiling, or maximum amount of gain reduction, and a Ceiling Curve that governs whether this operates as a 'brick wall' or as a gradual limit. A complementary Depth parameter specifies a maximum amount of gain reduction that will be applied when Compassion is used as a gate or expander.

Here, Compassion is serving as a dynamic EQ on a drum bus, side‑chained from the vocal track.By now, I doubt that anyone will be surprised to learn that Compassion can be used as a gate or expander, but, once again, its versatility is impressive. It can, in fact, simultaneously perform conventional expansion or gating, upward expansion (which increases the dynamic range of signals above the threshold) and upward compression (which squashes and makes louder the audio below the threshold, while leaving peaks untouched). The main Ratio control, meanwhile, runs from 1:1 at the leftmost extreme, through infinity:1 (hard limiting) at about two o'clock and then into negative compression, where the gain range of the signal is inverted. This is something I've only seen before on a few compressors, perhaps most famously the Eventide Omnipressor, and although you wouldn't want to use it every day, it can make for some interesting special effects on percussive sources. If there's one thing that's missing, it's the ability to set a different threshold level for the expander from that used by the main compressor. This can be a useful feature where, for example, you want to compress signal peaks while reducing low‑level noise, but leave the central part of the dynamic range alone.

Of course, no‑one would want to manually set every single Compassion parameter every time they used it, so as well as supporting conventional preset saving and loading, Compassion also incorporates what DMG call 'mods”: the ability to store a chosen subset of parameters. For example, if you've hit upon the perfect combination of behind‑the‑scenes tweakage to recreate an 1176 in every detail, you could store those tweaks as a mod, then simply use the Attack, Release and Threshold controls to set up your virtual vintage compressor for a particular track.

On The Surface

If that massive array of subtleties all sounds a bit intimidating — and it certainly did to me — it's a relief to learn, on first loading up the plug‑in, that you don't have to concern yourself with any of it if you don't want to. The basic Compassion screen simply shows the most important, conventional compression controls, along with a very distinctive graphical display. This, again, is slightly reminiscent of the scrolling display in FabFilter's Pro‑C compressor: the input waveform scrolls from right to left, while above and below it the amount of gain reduction is illustrated by the thickness of a coloured band that is alternately green or red, depending on whether the compressor is in its attack or release phase. The threshold level is shown by a white line, and you can choose to view the input or side‑chain waveform superimposed on the output waveform if you wish. It takes a while to learn how to get the best from such a display, and personally, I found I needed to choose a slower 'logging speed' in order to comprehend what was going on. Fortunately, it's joined by a very configurable and much more conventional bar‑graph meter, and you can switch it off if you want. The many extra controls for detailed configuration are accessed in an optional panel below the main window, where they are organised into a number of panes.

Compassion also features a well‑specified transient shaper and peak limiter.Attempting to describe the sound of Compassion is a bit like nailing the proverbial jelly to the wall, because it's designed to have any sound you want it to have. Its flexibility is illustrated by the supplied mods, which turn it into everything from a FET design to an optical compressor to a vari‑mu valve circuit, and much more besides. Even without tweaking, it delivered a creditable performance across the mix bus, imparting a smooth and slightly dark tone to a rock track — and I'm sure that, with tweaking, it could be made to respond in a hundred other ways. On instrumental tracks and vocals, I was particularly impressed by the lack of unpleasant side‑effects, even with very fast attack and release times. If you're simply after transparent dynamic control, Compassion will do that with aplomb; if you want something more characterful, all the tools are there, though figuring out how best to use them for yourself takes time. (Of course, unlike some dedicated emulations of specific pieces of analogue hardware, it won't reproduce the additional non‑linearities associated with transformers or valve output stages.)

The sheer flexibility of Compassion also means that it shines in problem‑solving roles where other compressors simply wouldn't work. For example, I was mixing a multitrack recording of a band that I'd made live, where drum spill on the vocal mic was proving a big problem. The drums sounded fine until I faded up the vocal, whereupon they acquired a nasty, trashy ring at 2kHz. I was able to deal with this to some extent by using Compassion as a dynamic equaliser on the drum bus, side‑chained from the vocal track. The vocal was fed into Compassion's side‑chain, where it was filtered; I then set up the main Compassion EQ to isolate the 2kHz region and only compress that. The result was that when automation lifted the vocal fader, and with it the 2kHz drum spill, the same frequency range was compressed on the drum bus itself: the results were far from perfect, but did seem to keep the overall tone of the drums a little more consistent.

Although it's very different in look and feel, the philosophy behind Compassion reminds me a little of McDSP's long‑established Compressor Bank plug‑in bundle. That, too, aims to use a single algorithm both to provide versatile dynamic control and to recreate the idiosyncrasies of hardware compressors. Compassion ups the ante even further in the features stakes, however, and is also more widely available than Compressor Bank, which is Mac‑only and doesn't support VST.

Quality‑wise, then, I would have no qualms at all about using Compassion as my only compressor, the more so since it can handle gating, expansion, dynamic EQ and transient shaping as well! On my system, however, I found that its impressive feature set brought with it a rather higher CPU load than most generic dynamics plug‑ins, so I gravitated towards using it only in the most important or challenging mix roles.

Overall, both EQuality and Compassion are up there with the best plug‑ins of their type I've tried, and as such are priced pretty keenly. If you like the idea of having one EQ or compressor to 'rule them all', rather than a number of different plug‑ins for different purposes, they fit the bill admirably.

Pros

  • EQuality is a nice‑sounding and very flexible EQ that can operate in CPU‑light Digital mode and a variety of others, including Linear Phase.
  • Compassion is extraordinarily powerful: quite possibly the most versatile dynamics plug‑in yet created!

Cons

  • Compassion's power brings with it a relatively high CPU load.

Summary

If EQuality and Compassion can't do what you want, you have a problem no EQ or compressor can solve!

Dmg Compassion Sound On Sound Effect

information

EQuality £99.99; Compassion £149.99. Prices include VAT.
EQuality £99.99; Compassion £149.99.

Test Spec

Dmg Compassion Sound On Sound System

  • Dell XPS laptop with 2GHz CPU and 4GB RAM, running Windows 7 Home Premium.
  • Tested with Steinberg Cubase 6.
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