05-18-11: Badwisdomyour mind is stuck in the analog domain method of volume control which you are trying to attach to a digital signal & are getting totally confused!! ;-)
Can anyone explain how the pure dock allows volume control on a supposedly all digital signal ???? How is that possible ???
Digital volume control has been done by Wadia since they were founded back in 1988! You do digital volume control by increasing/decreasing the bit width of the digital signal - longer bit length = higher volume, shorter bit length = lower volume. Hope that this helps.