Bluesound Vault position

I've found my Bluesound Vault is better situated on my rack in the vertical position. I'm certain streaming will not be an issue in this position, but I'm wondering if burning to the internal hard disc could be affected or if listening to already burned music could be affected. I played a couple of CD's I've burned to the internal hard drive and it seems to be ok, but perhaps the sound could be degraded. Doesn't seem so, but I'm wondering if you all have opinions? I tried googling it to no avail.