Not clearly documented as such, but the FILTER control swings both ways [lo-cut/highpass], FILTER effects can be spread by the difference in parallel DELAY times. The ’50’s sci-fi DELAY A setting is quickly decimated by the FILTER setting, while the DELAY B phrase loop disintegrates more slowly. Neither DELAY will output until your input drops below the THRESHOLD level, which can make for some interesting combinations of reflections & frequency response.
With shorter delay times, it’s important to keep the RELEASE time at least equal to – or better, less than – the smallest DELAY setting. Half of the shorter delay value is a good starting point for RELEASE, as to not ‘lose’ the delay in that segment of the compressor processing.
