Convolution reverbs promise so much but often leave the user frustrated by the lack of flexibility compared to using an algorithmic reverb. They can be stunningly realistic but if the impulse is close to what you want but needs a tweak to be just right, you might find yourself reaching for your favourite algorithmic reverb instead.

Reverb decay time is the second most important reverb parameter after wet/dry level and although you can change the length of a convolution reverb, there are restrictions on what can be achieved. Tailoring the reverb tail to your requirements can be fiddly and the timbre is often affected by anything more than small adjustments. Most convolution reverbs only offer a way to shorten the tail by manipulating the gain. Some like Altiverb offer the facility to lengthen the tail but this is also achieved by applying gain.

Applying the kind of timestretching techniques we’re familiar with in our DAWs isn’t really practical as it causes too many sonic artefacts. For a long time if you wanted to change (particularly lengthen) a convolution reverb, the choices have been mainly find a different IR or use an algorithmic reverb instead.

This has changed with the introduction of the contour tab in Reverberate 3.2. This tab brings similar levels of control of the reverb length that we are familiar with in algorithmic reverbs to convolution, including multipliers for bass and treble content with variable crossovers similar to what is found on classic reverbs like the Lexicon 480L

New Fusion IR Impulses

Free with this update are an extensive collection of new Fusion IR impulses from classic hardware from the 90s in the form of the the FS-91. Considering there is already an FS-48 we can probably make an educated guess as to which hardware these are based on. Usefully, as well as the halls, rooms and plates we’d expect to see there are two banks of Post presets with a huge variety of indoor and outdoor spaces.

In the video Julian demonstrates the problem Contour provides such an elegant solution to, showing first how using the facilities which were already available. The Stretch control affects timbre and the ADSHR controls are cumbersome compared to a single knob.

To find out more about contour read the blog entry on the Liquidsonics website which gives detail and background to this feature.