A demo showing off the Retroverb Lancet's reverb itself.
You can have it in two different modes - either POST or PRE.
In POST the audio input runs through the Filter and VCA before hitting the reverb, and you can blend between the Filtered and VCA'd sound and the original.
In PRE you put the reverb before the Filter and VCA, and can effectively shorten and filter the reverb. in this mode you blend between the original sound and the Filtered and VCA's reverb. the only thing that you CAN'T do is mix between the Filtered and VCA'd reverb and the Filtered and VCA'd audio input - you get 100% reverb signal into the FIlter/VCA
If you wanted to have a filtered and VCA'd signal in addition to a filtered and VCA'd reverb, and then blend between them you would have to use external processing before hitting the Retroverb. Not a big deal, but worth mentioning.
There is also a VERY slight bleed through from the inputted signal when you are using the reverb in POST mode. This is only really noticeable when you have a really low LP cutoff and the TONE of the reverb turned up. turning the TONE down effectively removes the bleed (the reverb's TONE control is actually really nice - when turned clockwise it attenuates bass and boost treble, and when turned anti-clockwise it removes top end and boost low end). The bleed is also only really noticeable when there is no VCF/A (non-reverb) signal present. Normally you are going to want some non-reverberated signal, so it's not going to be an issue in practice. You could always mix externally and filter out the bleed if desired. I noticed this before i bought the unit, and it didn't put me off. There is no bleed at all if the reverb is set to POST, so that's another option.
You can get some neat patterns by using the input signal to trigger the EG on the filter/ VCA, and setting it so it doesn't trigger on every note - this way, the enveloped/ filtered reverb just pops in and out on certain notes. it's certainly very useful being able to filter and alter the length of the spring reverb, as this is the main shortcoming of springs in general. in order to replicate this functionality with modules you'd need an a199 Reverb, mixer, filter, vca and some kind of envelope follower/ comparator to derive triggers from incoming audio.
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