sebp;616378 Wrote: > Hi Phil, > > I had another challenging session last sunday, and I surprisingly had > the impression I could hear some differences this time. > I couldn't really tell I heard anything missing from the CD version, > but the HD file just sounded better to my ears. > > As I don't trust them, I used Audacity's spectrum analyser with both > files, and looking at average gain values for some frequencies, they > always appeared to be a bit louder in the HD Version than in the CD > version. > If you look at the screenshots, you'll see it's 4 dB louder for 100 Hz, > for example (-32dB is for the HD file, -36dB is for the CD file). > > I then computed replaygains using foobar2000, and got -6.40dB for the > CD version and -6.02dB for the HD version. > > So, downsampling 24/96 to 16/44.1 with SoX seems to lower the average > gain of the 16/44.1 version a little bit. > > Is an average 0.38dB volume difference sufficient to be heard? > I can't tell for sure, but thought it would be worth mentioning...
Hi. Whether or not you can hear a 0.38dB difference is highly debatable - in my experience such things are barely audible... when mixing down, a 0.5dB lift/cut is barely noticeable and more often than not a 1-1.5dB change is requird o register as "different". Obviously this varies slightly from person to person. In this comparison, how were the 2 versions created? - using SOX to downsample? - taking HD and CD versions from a commercial release doesn't work as there is no way of knowing how the masters were created. By the way, the Audacity frequency spectrum analysis is highly suspect - it isn't accurate... -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... Touch(wired/XP) - Audiolense 3.3/2.0+INGUZ DRC - MF x-dacv3/x-10/x-psu(Audiocom full mods) - Linn 5103 - full Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Pekin Tuner, Townsend Supertweeters, Blue Jeans Belden Digital,Kimber 8TC Speaker & Chord Signature Plus Interconnect cables Stax4070+SRM7/II phones Kitchen Boom, Outdoors: SB Radio, Harmony One remote for everything. ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=85879 _______________________________________________ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/discuss
