Wombat wrote: > I am no expert but the filters should be pretty similar for up and > downsampling. The tradeoffs are pretty similar also. I don't know a > recording with high samplerate to test with that has similar bad dr > numbers as the ones Archimago used for upsample testing to have some > comparison.
Well boys I found you some music where upsampling "needs" ALOT of headroom! Feast your eyes on probably the most horrendous LOUD, CLIPPED "album" ever to "grace" this terrestrial sphere (and managed to get published)... I give you Venetian Snares & Speedranch's mega-lo-fi electronica-noise album "Making Orange Things" (2001). Check out these DR numbers: ---------------------- foobar2000 1.1.8 / Dynamic Range Meter 1.1.1 log date: 2012-06-25 19:25:19 -------------------------------------------------------------------------------- Analyzed: Venetian Snares & Speedranch / Making Orange Things (DR0, FLAC) -------------------------------------------------------------------------------- DR Peak RMS Duration Track -------------------------------------------------------------------------------- DR0 0.00 dB -1.04 dB 4:26 01-Fire Beats DR0 0.00 dB -0.86 dB 4:42 02-We Hate Russell DR0 -4.56 dB -3.75 dB 2:32 03-Pay Me For Sex DR0 0.00 dB -0.44 dB 3:56 04-Cheatin' DR0 0.00 dB -0.46 dB 3:26 05-Unborn Baby DR0 0.00 dB -0.41 dB 4:05 06-Meta Abuse DR0 0.00 dB -0.32 dB 3:51 07-Molly's Reach Around DR0 0.00 dB -1.09 dB 3:33 08-Russell Hates this Track DR0 0.00 dB -0.76 dB 3:23 09-Viva Las Vegas DR1 0.00 dB -4.03 dB 3:39 10-Tushe Love DR0 0.00 dB -1.61 dB 3:51 11-Halfway Up the Stairway of Mucus -------------------------------------------------------------------------------- Number of tracks: 11 Official DR value: DR0 Samplerate: 44100 Hz Channels: 2 Bits per sample: 16 Bitrate: 1292 kbps Codec: FLAC ------------------------------------ Behold the horror of track 7 - "Molly's Reach Around" - nasty in more ways than one! RMS volume at -0.32dB. This is either an audiophile geek's nightmare or something for Ripley's... 14802 Now let us reduce by 6dB's: 14803 Upsample with Adobe Audition 3.0 to 32/192: 14804 Peak volume now is an amazing *-0.18dB*!!! So, I guess if you listen to this type of "music", you "need" 5.82dB of overhead! Congrats to the band... Of course, you would not expect anything like this with acoustic recordings... +-------------------------------------------------------------------+ |Filename: Upsampled.jpg | |Download: http://forums.slimdevices.com/attachment.php?attachmentid=14804| +-------------------------------------------------------------------+ ------------------------------------------------------------------------ Archimago's Profile: http://forums.slimdevices.com/member.php?userid=2207 View this thread: http://forums.slimdevices.com/showthread.php?t=98661 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
