Bitwig's own tutorial channel introduces phase as the fourth descriptor of sound, sitting alongside pitch, timbre, and loudness. Where those three define what a sound is, phase defines how it moves over time — and without that motion, even a well-designed patch tends to feel static and flat.
In The Grid, phase is represented as a continuous signal running from 0 to 1, defaulting to one bar. This is a fundamentally different model from the event-driven trigger approach used by most hardware and software sequencers, where each step fires on a discrete pulse.
The host shows how a Phase Counter bridges these two worlds, converting the continuous phase signal into the stepped triggers that traditional sequencers expect. But the native phase approach is more accurate and more flexible — and Bitwig wires it in by default, so step sequencers are already synced to the transport the moment you drop them in.