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djphazer / O_C-Phazerville

The kitchen sink of O_C firmware - do all the things!
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Quadraturia does not remember VOR settings #18

Closed adamjmurray closed 10 months ago

adamjmurray commented 11 months ago

I'm running o_C-phazerville-v1.6.2+VOR-2224121e.hex on a a Plum Audio OCP X. When using the Quadraturia app, saving state will not remember the VOR settings. Long-pressing the right encoder to go to the app menu and then immediately returning to Quadraturia loses the VOR setting and it resets to -5/5V range, so the setting may already be lost before any attempt to save state can be made.

Not sure if this is an issue with other apps. It might even be a long-standing O_C issue. All I can say for sure is I'm using Quadraturia a lot lately and I have to remember to fix the VOR setting every time I power on my synth.

djphazer commented 11 months ago

The Vbias setting is not currently stored in EEPROM for any app... it's a nice idea that was never implemented. I've thought about adding it as part of Hemisphere Config. I'll consider injecting it into the Quadraturia settings when I can.

There is an auto-config mechanism that sets certain ranges for each app when you switch to it - for Quadraturia, it's the +/-5V range.

Out of curiosity, which range are you using?

adamjmurray commented 11 months ago

The Vbias setting is not currently stored in EEPROM for any app... it's a nice idea that was never implemented.

Ah ok. That makes sense. I guess the majority of the time I am happy with the vbias auto-config behavior so it took me a while to notice this long-standing limitation.

It would be cool if it's supported one day, and I understand Hemispheres support is usually the priority.

Out of curiosity, which range are you using?

I normally would use +/-5V, and I think that makes sense as the default for Quadraturia since it's a quad LFO and LFOs are normally bipolar.

I encountered this limitation because I've recently become very interested in sampling and holding cyclical modulation instead of noise. I am using a ton of S&H modules, including Mutable Instruments Stages to do S&H. But Stages is unipolar and can only process signals in the range 0-10V. So, I switched my O_C VOR to 0-10V so I can feed the Quadraturia output into Stages. Probably a pretty unique use case. Although, there are plenty of situations someone might want unipolar positive modulation signals, so I'm sure other people will run into this.

One thing I'll add, regarding:

Long-pressing the right encoder to go to the app menu and then immediately returning to Quadraturia loses the VOR setting and it resets to -5/5V range,

I can live with needing to restore the VOR state after powering on, but it's pretty jarring when it loses the state simply by trying to save the state of the O_C to EEPROM. If it's easier to keep the VOR state in RAM(?) so it can at least remember it after long-pressing the right encoder, that would greatly improve usability. On the off chance this would be easier to address, this could be a shorter-term improvement before it's stored in EEPROM.

djphazer commented 10 months ago

Implemented in v1.6.3 - try it out!

adamjmurray commented 10 months ago

Works great during my initial tests. Thanks!