Re: Converting my lossless rips to AAC, do I go with 256kbs, 320kbs or 320kbs VBR?
Reply #19 –
Higher bitrate usually means that frequency cutoff is higher and psychoacoustic threshold for audibility is lowered so that more of the less important parts are included. But this isn't a guarantee that higher bitrate file has better quality if they are from different encoders or they are encoded with some custom encoding parameters.
You mean the threshold of audibility is raised, not lowered. Regardless, if the threshold of audibility is not reached with a lower bitrate then the quality of the encode is not any worse than if it was made with a higher bitrate.