Hi guys, I wanted to quickly see how much headroom is needed for probably the loudest clipped/compressed/limited track I have in my collection to examine the effect in real "music". From the Iggy & The Stooges album "Raw Power".
-------------------------------------------------------------------------------- Analyzed: Iggy & The Stooges / Raw Power (1997 Iggy Remix, FLAC) -------------------------------------------------------------------------------- DR Peak RMS Duration Track -------------------------------------------------------------------------------- DR0 0.00 dB -2.08 dB 3:29 01-Search And Destroy DR1 0.00 dB -2.27 dB 3:33 02-Gimme Danger DR0 0.00 dB -0.79 dB 4:55 03-Your Pretty Face Is Going To Hell DR2 0.00 dB -3.17 dB 3:42 04-Penetration DR2 0.00 dB -3.30 dB 4:16 05-Raw Power DR2 0.00 dB -4.05 dB 4:53 06-I Need Somebody DR1 0.00 dB -1.73 dB 3:05 07-Shake Appeal DR1 0.00 dB -2.80 dB 6:07 08-Death Trip -------------------------------------------------------------------------------- Number of tracks: 8 Official DR value: DR1 DR value of 1!!! The loudest track in there is "Your Pretty Face Is Going To Hell" - DR0 with RMS dynamic range of 0.79dB! Behold: 14777 Let's reduce the track by 6dB: 14778 Using dBPowerAmp ASRC to upsample to 192kHz: 14779 Peak volume from -6dB when upsampled has turned to -3.7 (Left), -3.76 (Right) for the intersample peaks. This means there was a need for 2.3dB volume headroom using this ASRC algorithm. Benchmark's 3.5dB overhead looks very reasonable... I think it's important to note that tracks like these are really bad sounding (no kidding)! In fact, I increasing the ASRC volume up to +6dB (no headroom) and compared with the original nasty clipped copy off the CD, I cannot ABX the difference even though I know it's clipping even more. +-------------------------------------------------------------------+ |Filename: ASRC_192.jpg | |Download: http://forums.slimdevices.com/attachment.php?attachmentid=14779| +-------------------------------------------------------------------+ ------------------------------------------------------------------------ Archimago's Profile: http://forums.slimdevices.com/member.php?userid=2207 View this thread: http://forums.slimdevices.com/showthread.php?t=98706 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
