So I been analyzing the soundtrack quality with "
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", a software to check spectrum and detect fake/bad encoding. And when the musical selection is indeed great, the raw quality (bitrate, KB) is absolutely poor and inconsistent.
MP3 encoding norm, if not variable, are 128/192/256/320KB.
Out of 161 tracks:
15 are <128k
-- this is the worst MP3 quality
93 are 128k
-- this a low quality MP3
16 are poor variable of 139/166k
13 are 192/256k
-- this should be considered the minium MP3 quality to keep a ratio of size/quality
14 are quality variable of 315/319k
10 are perfect 320k
-- best mp3 quality
So in that first picture it's a 128k, you can see the deep of sound cut at around 16K, the HiFi norm is 20K.
The second picture is a 320k, here we can see the deep is over 20K, the sound have more volume and range, quality.
View attachment 924000
View attachment 924006
In short: 128k ~16K | 192k ~18K | 256k ~20k | 320k >20K
Some of the licensed tracks can even be pretty poorly encoded, here supposed 192k when in fact poor 128k.
View attachment 924009
View attachment 924010
So here the balance with quality/size. Actually the soundtrack weight 600MB. A 3min sound in 128k is about 3MB when a 320k is about 8MB. At 320k the soundtrack size could almost triple or reasonably at 256k double.
My 2-cents, DPC should double check the sound quality, standardizing it, get better sources if needed for consistency.