Need help with adding volume control to op amp!
Your circuit will let you turn the volume down, but it won't let you amplify. If that's okay with you, your change shouldn't cause a problem.

I'm not a hi-fi audio expert, but this circuit seems overly complicated to me. The TPA6210A2 datasheet doesn't suggest any need for the elaborate pull-down network on the non-inverting input. I'm not sure that 10 MHz low-pass filter on the input is doing much good, either. (EDIT: It's actually 1.6 MHz -- my mistake.) 470k for the input pull-down seems like way too much, given that larger resistors create more noise.