I'm using Tone.LFO() to modulate amplitude of a synth. When I use the sinewave at for example quarter notes, the frequency is correct, but the waveshape is not in sync (the phase is wrong, it looks about 90º off). I've tried setting the phase = 90 but this results in unexpected behaviour (please see the image below from a scope view in Max, looking at the sound coming directly from the browser via Loopback, the right output is a hihat sample using Tone.Loop() at quarter notes, the left is a synth with Tone.LFO() also at quarter notes). Because I think changing the phase actually doesn't wrap the phase so I lose a part from the waveform (see images below).
Phase moved by phase = 90:
Phase moved by phase = -90:
When I change the LFO to use a squarewave with this._lfo.set({ type: 'square' }); the phase is actually correct! But the squarewave has another issue, it is not completely silence (so it's not going from 0 to 1) resulting in the synth still sounding a bit softly in the middle parts.
Using a sawtooth LFO the phase is again off, but this time it looks to be off by 180º
Is there anything that can be done to fix these phase offsetting issues? It would be great if the phases would be the same for every wavetype that can be selected. And if the squarewave can be silenced in the middle part. Thanks in advance for the help!
Hi!
I'm using
Tone.LFO()to modulate amplitude of a synth. When I use the sinewave at for example quarter notes, the frequency is correct, but the waveshape is not in sync (the phase is wrong, it looks about 90º off). I've tried setting thephase = 90but this results in unexpected behaviour (please see the image below from a scope view in Max, looking at the sound coming directly from the browser via Loopback, the right output is a hihat sample usingTone.Loop()at quarter notes, the left is a synth withTone.LFO()also at quarter notes). Because I think changing the phase actually doesn't wrap the phase so I lose a part from the waveform (see images below).Phase moved by
phase = 90:Phase moved by
phase = -90:When I change the
LFOto use a squarewave withthis._lfo.set({ type: 'square' });the phase is actually correct! But the squarewave has another issue, it is not completely silence (so it's not going from0to1) resulting in the synth still sounding a bit softly in the middle parts.Using a
sawtoothLFO the phase is again off, but this time it looks to be off by180ºIs there anything that can be done to fix these phase offsetting issues? It would be great if the phases would be the same for every wavetype that can be selected. And if the squarewave can be silenced in the middle part. Thanks in advance for the help!