“SoundHack Delay Trio is a group of three plugins derived from the same basic delay algorithm: a hermite interpolated delay line with variable modulation, and a feedback loop with dc blocking and saturation. Pitch shifting is achieved with a dual head crossfading delay (ala Eltro Tempophon/Dennis Gabor/Pierre Schaeffer phonogene) and is decidedly low-ﬁ. The saturating feedback also allows them to be great drone and noise generators.
The three plugins are +delay (classic delay effects), +pitchdelay, (essentially the same plugin with controls oriented toward pitch shifting), and finally +bubbler (a granular delay in which grains are pulled from the delay line with randomized start time, delay time and pitch shift value).”
Source : SoundHack