User adjustable playback speed

Hi,
I do a lot of voice cleanup and want to find a way to increase the playback speed to 1.5x normal. I know I can do Shuttle 2x through key commands but that’s too fast, and I know I can grab the shuttle wheel and hold it, but that is cumbersome and inaccurate.

Can I create a 1.5x play speed key command?

Thanks, Dave