This Ableton tutorial walks through Meld's modulation matrix, showing how to map the modulation envelope to a tone control by clicking and dragging in the matrix view, then shaping the envelope's attack to taste. It's a clean demonstration of how the matrix works as the central routing hub for all modulation assignments in the synth.
With Oscillator B enabled and set to Fold FM, the tutorial highlights one of Meld's key design features: each oscillator carries its own discrete set of envelopes. You can edit them independently or lock them together with the chain icon, which mirrors any change made on one engine to the other automatically.
For Oscillator B, the goal shifts to a rhythmic feel, so LFO 1 gets mapped to filter frequency through the same matrix workflow. The comparison between envelope modulation on Oscillator A and LFO modulation on Oscillator B makes the dual-engine logic concrete and easy to apply to your own patches.