rate_ultra: shift whole pitch range up/down

[ronso0]

This is a request from a fellow vinyl DJ who is used to ultra-pitch feature of some older Vestax turntables, but kind of fell in love with Mixxx and my Reloop TerminalMix recently.
If I understood it correctly, on those devices you could shift the pitch range center with a small slider, while you could still fine-tune the speed with the actual pitch slider.

Example: speed up the track to +30% with ultra pitch, then you can use the regular pitch fader (+-10%) to fine-adjust the speed between +20% and +40%.

This allows to beatmatch tracks which are too different to be mixed with the regular +/-8% pitch range. Increasing the pitch range to something like 50% provides the sufficient range but apparently lacks the fine-grained control.
For various reasons, pushing the Sync button is also not an option... ;)

* I'm using [Shift + wheel turn] to increase rate by 1 BPM for a while now.
  I imagine this a proper control to shift the pitch range as well.
* rate range display near pitch slider should provide sufficient on-screen
  feedback, see lp:1762174
* [Shift + pitch slider center] could reset the pitch range to default +/-N%

[Daniel Schürmann (daschuer)]

We already have the rateRange control. However this is not scaled well to fit on a knob control.
It sounds as if this does not suite, right?
It sounds as if the knob is a coarse rate slider that keeps the normal rate slider on 8 %.

[Daniel Schürmann (daschuer)]

These buttons are already possible.
https://www.amazona.de/test-reloop-rp-7000mk2-dj-plattenspieler/3/
But are we able to fully emulate this turntable? What does the center led?

[ronso0 (ronso0)]

I think that's the turntable my friend referred to and the feature is called Ultra Pitchfader: Vestax PDX2000
https://www.emusician.com/gear/vestax-pdx-2000

"However, the turntable's ULTRA PITCHFADER makes up for this limitation by allowing users adjust therotation speed ±50 percent. The fader works in conjunctionwith the traditional Fine Pitch fader, which provides control overa ±10 percent range, giving a total of ±60 percent pitchadjustment. This means you can slow records down well below 16 rpmor speed them up much faster than 78 rpm to match any desiredtempo."

Example: speed up the track to +30% with ultra pitch, then you can use the regular pitch fader (+-10%) to fine-adjust the speed between +20% and +40%.

[Daniel Schürmann (daschuer)]

ok, it sounds the same like Reloop did.
The center Led means, no ultra pitch offset.
I think we can provide controls for both interfaces.
How would this be presented in skins?

[ronso0 (ronso0)]

I think we need two things:
1) an optional 2nd ultra pitch fader that shifts the pitch range
2) labels for the regular pitch fader that display the lower & upper limit.
any pitch range offset is visible then even if the ultra pitch fader is hidden.

[Daniel Schürmann (daschuer)]

first step is done:
https://github.com/mixxxdj/mixxx/pull/1765

[Daniel Schürmann (daschuer)]

the second step is here: https://github.com/mixxxdj/mixxx/pull/1767

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/9226