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Marius · Joined: Jun 10, 2013 Posts: 51

Hi Jarek,

is it possible to retrieve the momentary phase of a sinus signal from a SimulationSource?

My goal is changing the frequency of a simulator during runtime while keeping the phase. The above question targets on retrieving an setting the momentary phase, but it would even easier if the phase would be kept during the frequency change.
For changing the amplitude it works already by chosing Post actiion - none , but not for frequency.

Marius

jarek · Joined: Oct 22, 2007 Posts: 1073

If the Simulator is generating a pure sine signal of a known amplitude, then you can calculate the phase in ExpressionEvaluator using the generated value, previous value and Math.asin (or Math.acos) function.

If you want to change the frequency it might be a good idea to do this when the output value is 0. But this might not be easy (or even possible) if you need to keep a perfect continuity of the signal.

The Generator can do this. It changes both amplitude and frequency gradually, it works great for audio generation. I am not sure it could replace Simulator.

Marius · Joined: Jun 10, 2013 Posts: 51

I tried with generator.
It produces an extremely high output rate which is unimpressed by whatever value I set in the \"output sample rate\" field.
Is this a know issue for you?

jarek · Joined: Oct 22, 2007 Posts: 1073

Generator is only for sound/audio creation, it should be used with PCMAudioPlayer (see BioEra examples). The output sample rate worked the last time I used it.