J Mascis fired longtime drummer Murph before the recording of Without a Sound, which came as a surprise to Murph.
Naturally, the change in personnel hasn't changed Dinosaur Jr.'s sound much; the only difference between Without a Sound and Where You Been is a more pronounced country leaning (particularly on the album's high point, the rollicking "I Don't Think So") and shorter, more concise performances.
What hasn't changed are the overpowering fuzz tones of Mascis' guitar, which tend to hide his more expressive vocals; it also makes digging out the gems on this album a little more difficult than necessary.