First you need to set an RTP parameter in the component

Then in code its possible to set the RTP parameter value using the name of the event and the parameter name like so,

if(Input.GetKeyDown(KeyCode.Alpha1)) 
{
	Fabric.EventManager.Instance.SetParameter("Event", "impact", 0.5f, gameObject);
}

 To set a timeline parameter in code,

if(Input.GetKeyDown(KeyCode.Alpha1)) 
{
	Fabric.EventManager.Instance.SetParameter("Event", "RPM", 0.5f, gameObject);
}

if(Input.GetKeyDown(KeyCode.Alpha6)) 
{
	Fabric.EventManager.Instance.SetDSPParameter("Event", Fabric.DSPType.LowPass, "CutoffFrequency", 5000, 5, 0.5f, gameObject);
}