Timothy Stockman;222452 Wrote: > Using your hdcd.exe program on the title track of Mark Knopfler's > "Sailing to Philadelphia", which reports "Detected HDCD". Looks as if > the peak limiter/peak extension feature was not used (see attachments). > Looks like with this track, there's no real reason to push it through > an HDCD decoder.
I've just had a look, I did actually own the CD but hadn't realised that it was hdcd. The peak extension bit is set throughout the track, and peak extension is used to some extent. The smallest and higest samples in the track are -31194 and 31193 (about -0.43dBFS), which after processing become -4885432 and 4885140 (about -4.70dBFS) Without peak expansion, they'd just have been attenuated by 6dB to give -3992832 and 3992704 (about -6.43dB), so the peak expansion is having an effect. You can see how steep the final part of the curve is though, given that it's mapping 0.43dB to 4.7dB. The threshold value at which the peak expansion curve goes non-linear is +-22913 (about -3.11dBFS). Regards, Chris -- cjk32 ------------------------------------------------------------------------ cjk32's Profile: http://forums.slimdevices.com/member.php?userid=5151 View this thread: http://forums.slimdevices.com/showthread.php?t=32967 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
