smarter lfo shaper morphing on polytone

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manisnotabird
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Location: Austin, TX

Post 07 Jul 2024

if layer a has the mod lfo shape set to sine and mod b has the mod lfo set to smooth random, morphing between the two means doing sine for a little bit, then triangle, then square, then ramp up, then ramp down, then sample and hold, then smooth random with hard jumps between each. seems like it should more smoothly morph between the two shapes. i also think there should be an option to cross-fade between two different oscillator pitches when morphing, instead of doing the THX thing.

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huggermugger
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Post 07 Jul 2024

The audience is listening...

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selig
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Location: The NorthWoods, CT, USA

Post 08 Jul 2024

manisnotabird wrote:
07 Jul 2024
if layer a has the mod lfo shape set to sine and mod b has the mod lfo set to smooth random, morphing between the two means doing sine for a little bit, then triangle, then square, then ramp up, then ramp down, then sample and hold, then smooth random with hard jumps between each. seems like it should more smoothly morph between the two shapes. i also think there should be an option to cross-fade between two different oscillator pitches when morphing, instead of doing the THX thing.
First, understand that morphing is just 'moving controls' behind the scenes. So if the control cannot crossfade between selections, then the morph cannot morph between them.
The original oscillator could not do this until it was updated to smoothly slide between waveforms, and programmed to ignore the shapes in between (what I think you're asking for with the LFO).
Which means you cannot do certain transitions because of this, like between a saw and a square (because the shape must be set a different positions) so you end up doing a 'morph' between the shape control AND the waveform selector in this case), which gives a bit of PWM during the morph.
That said…
To do the first (LFO SHAPE) would require a change to the LFO Shape knob to make it like the Wave selector smoothly transition as it does with the main oscillators. Not sure why they added this to the main oscillator but not the LFO…

As for the frequency shift, remember that morphing is just moving controls. So your options for morphing between two different tunings would be a jump at the mid point, or the current "glide" between frequencies.
If you prefer to crossfade between the oscillators, why not just use crossfade mode? I must admit most of my Polytone patches are mix mode with the crossfader at 50% - that setup gives you a four oscillator/dual filter BEAST of an analog synth IMO!
Selig Audio, LLC

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manisnotabird
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Joined: 20 Feb 2015
Location: Austin, TX

Post 08 Jul 2024

Maybe there should be a glide between fine pitch and a cross-fade between course pitch.

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