Low frequency oscillators for Node-RED.
Will output numbers between -1 and 1 at the given frequency according to the selected waveform.
Sending a number as msg.payload will change the frequency of the LFO. Sending the string 'start' as msg.payload is required to start the generator. Sending the string 'stop' as msg.payload will stop the output. Sending anything else will start the waveform. The waveform can also be changed dynamically by changing msg.waveform valid choices are:
- sine
- saw
- saw_i
- triangle
- square
- sig
Beware of setting the sampling rate too low as it may hog your CPU. To avoid CPU hogging, chunked output can be activated: when chunk size is set to N, then only every N-th sample an output message will be send (containing an array of N samples).
An example flow is available via the Node-RED flow editor menu: Import / Examples / Lfo