HDCD CDs and transcoding

[simbun]

Unless something has changed my understanding is that using '-af hdcd' would adversely affect the remaining 99.6% of my music collection (at least with my testing of ffmpeg directly it does)? I know I can turn the volume up, but not sure I'd trust myself to turn it back down once I've finished listening, so it doesn't blow the speakers when I listen to other sources (or hdcd tracks).

I know there has been some talk of introducing/increasing the replaygain values on the rest of the collection, but that feels like a real hack.

I only ran the ffmpeg code against the first track of each disc (01*.flac) and it gave me consistent results to CUETools, so it wouldn't take long to know what work has to be done, and it's less than a minute for the conversion itself so you'd probably be sorted in a few hours (I know there were some artists that made extensive use of HDCD so that estimate will vary dramatically!).