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The Sound Of Liquid Metal.
Essentially a mechanised, 20th Century variation on the classic idiophone (such as the Xylophone or Marimba), the vibraphone adds a constant modulation to its resonator tubes by the use of motorised fans. These fans, or discs, cover the top of the resonator tube and spin in unison, allowing full or partial function of the resonator tube depending on which point of the cycle the motor is in. The resulting tone is a type of tremolo effect - very wobbly indeed, due to all resonators modulating together and thus aggregating the effect on the decaying notes.
True Tremolo Modelling.
Instruments that use this kind of global modulation (the Hammond C3/leslie is a similar example) are traditionally impossible to sample & model realistically, because if you record a single note with the tremolo active, it will be completely out of sync with all subsequent notes you record.
Previous attempts to sample the vibraphone usually resorted to sampling the instrument with the motor/tremolo switched off, then approximating the effect later using filters modulated by an LFO.
Soniccouture Vibraphone takes a new approach - by sampling the entire instrument twice. Once with the fans closed, once with them fully open, both times completely static - the motor switched off.
Once we have the full vibraphone sound in both states - fans closed and fans open - we can then simply crossfade between them in Kontakt using a simple LFO. This gives not only the authentic, detailed timbre, but also full control over the speed of the tremolo, another essential element of the instrument missing from previous renderings.