Originally Posted by axle
But a deep FIFO certainly will. I think that the HD621 deep FIFO is the reason that the HD621 improves bass.
I am quite sure this 'feature' is not unique to the HD621, I believe it is because of the nature of HDMI. The audio needs to be buffered because it needs to be demuxed from the video data. I hear the a clear improvement in the tightness of the bass using my Octava.