How to detect if a track has been transcoded from lower bit-rates to higher?
Also, if the quality sucks then is good chance. Of course quality could suffer from bad encoder and/or settings, which is still the same thing in the end-- low fidelity. The chances are if you can't tell 15 times out of 16 that it isn't bad quality then is likely your quest is already over
or purchase it from a service that isn't silly enough to transcode.
Yes it is noise , 70dB down.
Quote from: KMD on 22 February, 2012, 08:43:25 AMYes it is noise , 70dB down.You mean the spikes colored in blue? If so, it is an "inflated" copy of the lower bitrate track?
an un-thought-through question:what would be the main impact of such a recording:- dynamic range- high freqency response- less well defined signal degradation?
but on second reading of your original post I hve second thoughts and ask is the third plot straight to 320 or 128 to 320 as that makes a difference.
Furthermore, you can't draw a direct relationship between bit rate and perceptual sound quality, because of variances in encoders. I would take a 160 kb/s MP3 encoded with a newish version of LAME over a 320 kb/s BladeEnc circa 2001 encode any day.
Quote from: db1989 on 21 February, 2012, 04:53:28 PMor purchase it from a service that isn't silly enough to transcode.devil's advocate here, how do you find out if a service is "silly enough to transcode" if do you not test the mp3s they are selling?