The quality level you select will automatically be selected for all future downloads. If you have selected a quality level which is not currently available for a particular album/track it will default to the next best quality level. (i.e. you regularly purchase our 24bit WAVs, but a particular release is only available 16bit WAV)
You can update your preference at any time. You can also amend the quality level of any track or album you purchase at the checkout.