Extra long waveform to display with zoom and automatic scrolling

Hello.

I need to display the hours-long wave file by either using waveform~, plot~, multislider etc.

and I would like to zoom-in the waveform of the playing part as it scrolls automatically (right to left).

I see waveform~ has a mouse control of zooming the segment, but I want to fix the horizontal zoom without mouse control.

Any solutions?

thanks.

Best,

Jun