Maybe it's me, but since the last channel update about ten days ago it seems there's also been a slight audio improvement. A little deeper bass and a little less clipping on the highs, at least on some of the rock and pop channels. Maybe, maybe not. But it also occurred to me how much the audio has improved overall since I signed up 20 months ago - even though they've divided up the bandwidth with more channels. Using an FM modulator, I'd say it's still not quite as good as standard FM, but it's much closer than it used to be.