Quantum MK2 Polyphonic Hybrid Keyboard Synthesizer

Waldorf's Quantum line has always been about bridging the gap between analog warmth and digital possibility, and the MK2 represents a significant leap forward for a synth that was already doing something special. The addition of polyphonic aftertouch on the Fatar keybed changes everything about how you interact with the instrument—instead of all your notes responding to pressure the same way, each key responds individually, opening up expressive possibilities that feel genuinely new even if you've spent years with other aftertouch keyboards.

Under the hood, you're working with a hybrid engine built on 8 voices of analog filtering that can expand to 16 voices when you engage the digital filters. Each voice gets three stereo digital oscillators, and here's where things get interesting: those oscillators aren't just wavetable machines. You get five distinct synthesis modes per oscillator including wavetable, waveform, particle synthesis, Resonator for physical modeling, and Kernel, which is Waldorf's modular-style synthesis environment where you can chain up to six audio kernels together for custom FM, AM, and wavetable modulation arrangements. The dual analog lowpass filters per voice can run in 12dB or 24dB slopes with flexible linking modes, and the Digital Former section adds another layer with comb filters, distortion, bitcrushing, and multiple filter models. Six LFOs, six envelopes, a Komplex Modulator for multistage modulation, and a deep 40-slot modulation matrix give you the control depth you'd expect from a flagship instrument. The 61-key semi-weighted Fatar keybed feels substantial without being heavy, and the high-resolution capacitive touchscreen surrounded by aluminum knobs and encoders creates a workflow that balances tactile immediacy with deep editing capability.

The MK2 arrived with some serious upgrades over the original Quantum: the polyphonic aftertouch keybed, expanded sample storage to 59GB, and improved mechanical design. The community response has been strong, with musicians appreciating the expressive potential of the poly-aftertouch implementation and the sheer synthesis flexibility.