# `Mx.Clock`
[🔗](https://github.com/mx-music/mx/blob/main/lib/mx/clock.ex#L1)

The Unix time in microseconds mx plays against: the system's, or while a song renders offline, the time its render has reached.

A render sets the time with `start_render/1` and moves it on with `advance/1`, so the band, its loops and the engine work out a song as they do when it plays, only as fast as the render goes.

# `advance`

Moves a render's time on to `at_us`.

# `now`

The time now, in Unix microseconds.

# `rendering?`

Whether a song is rendering offline, so the time moves only as the render moves it.

# `start_render`

Stops following the system's time and holds the time at `start_us` until `advance/1` moves it.

# `stop_render`

Follows the system's time again.

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*Consult [api-reference.md](api-reference.md) for complete listing*