Hey all, I was wondering if there was an easy way to write sine wave automation in reason 4 (as in automation that is a sine wave for any given parameter eg volume).

As far as I know, no. There's always rewire though, and there are programs that can be rewired into that CAN do it.

For a nice sine wav your best bet is using a cv plug from lfo output on maelstrom or subtractor or something. You can't really draw nice curves in Reason natively :[

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ducat is awful

that's a shame, thanks for the help

If you need an exact sine, I agree with ducat, you should simply use any LFO to controll your parameter (if your parameter has no CV-Input, do it via a combinator programmer).