I do have one, but it's the only one. I immediately enter my Master Volume CV on my sound decoders and halve the maximum value that it can have...which is what the default usually is...full bore. Once I get rid of that instant headache, at which virtually every locomotive I own actually sounds decent, I do the address change and alter the CV3 and CV4. From there I tweak the individual sounds. For CV3, Inertia, I like my trains to accelerate reasonably realistically, but not to have to keep adding a speed step every couple of seconds. So, if CV3 has a max value of 255, my new locomotives get about 60 to start, and the same in CV4, Momentum, so they don't stop as if they'd hit a wall. This way, when I want to start a train, I dial up 50 mph quickly, and let the decoder do everything else except blow crossings.