Pot substitution question

[mpayne]

I’m implementing this effect loop out of Merlin’s preamp book and was wondering if I could use a different pot for R55?  The schematic in the book shows a 1Meg linear and I was wondering if a 500K linear would work?  Would the smaller value change the amplitude (or anything else) that much? 

Thanks,
Mike

[PRR]

Do it.