Microtonal slider

I need a virtual slider that can play any standard pitch (a synth wave probably) (ex. C2) and can go up an octave higher (C3). And show the accurate pitch frequency of any microtonal note in between.
I wanna have multiple such sliders for microtonal chord/voicing creation.
How can I achieve that?? Thnxx
Control VCOs from a linear pot.
Get a Theramin.
You may have to calibrate a meter yourself to show the pitch, which is possible.
How about using the touch sensitive strips, that you find on keytars and some synths.
Digital Multimeters that display frequency are pretty common and cheap. For fine frequency setting I would use a mult-turn pot.