A noise oscillator layer gives delays textural material to sustain between note events

When a noise circuit is mixed with pitched oscillators before a delay effect, the continuous broadband energy of the noise gives the delay something to ‘grab onto’ between chord hits — producing an atmospheric wash that fills silence without requiring long note lengths. This technique is distinct from simply boosting reverb; the noise’s stochastic content means each delay repeat varies slightly, adding life. In dub techno production the noise layer is kept low in the mix (secondary to the main oscillator) so it colors the texture without overwhelming the pitched content. A common misstep is too much noise, which muddies the harmonic content.

Examples

In U-he Diva (or any synth with a noise circuit), enable noise on VCO 1, set the Mix dial to roughly 2 o’clock favouring the main oscillator, then send through a tape delay. The noise bleeds into the delay tail, creating an ambient chuff between chord attacks.

Assessment

Explain why noise added before a delay produces a different result than noise added after the delay. Demonstrate by toggling noise pre- vs post-delay on a test patch and describing the audible difference.