The Korg Prologue and Minilogue-XD feature the ability to load digital user-oscillators that extend the range of possible sounds. Good candidates for these are emulations of oscillators from early digital/analogue hybrid synthesisers, replicating waveforms and wavetables from instruments such as the Korg DW-8000 , the Kawai K3 , the Ensoniq ESQ-1 and PPG Wave . But, there is a catch. Logue plugins run on a relatively slow processor, an ARM Cortex M4, with only 32KiB of shared code and data space.
The new fusion plugin for Korg Prologue and Minilogue XD has been released. This uses a newly developed virtual-analogue synth engine, which runs on the Logue’s Cortex M4 oscillator CPU. The engine combines high-quality anti-aliased oscillators with true 2x oversampling for the best possible audio quality. fusion attempts to answer the question: can I put a 24dB/octave filter in my Logue? Changing the VCF is not viable, so fusion aims to be the next best thing: a user-oscillator that provides virtual analogue models of the Minilogue XD VCOs combined with a multi-mode digital filter.