16 khz drop off?

[cliftonmiles]

I've been analyzing some mixes while a/b'ng them to my own and ive noticed a dropoff at 16khz. My mixes (after i've "mastered" them of course) don't seem to have this drop off. I've tried rolling off to 16 khz in the individual tracks and also on the master bus and that doesn't seem to emulate the roll off in the mixes i've been analyzing.

Can someone explain to me the reason behind this and how to achieve this?

Thanks for your time.

 

[Habsburgs]

mp3?

 

[cliftonmiles]

I was just generally speaking, but here is one of my latest mixes.

Feel free to critique as well.

http://dl.dropbox.com/u/4755700/An Angels Treason_Cloudwalkers_DR.mp3

 

[Melodeath]

I think he's asking if your reference mixes are mp3. Or, he should be

 

[Seth Munson]

I actually just noticed this yesterday and I was analyzing WAVs

 

[premx]

I think he's asking if your reference mixes are mp3. Or, he should be

im 100% sure it is

 

[cliftonmiles]

im 100% sure it is

Ah! Yes, i've been analyzing mp3's from Adam D. and other producers work as well, and i've noticed that it was a pretty common thing.

 

[ronnan]

I think thats the compression that mp3 uses..Cuts everything above and below certain frequencys...

 

[kramer1309]

That's right.. mp3's compress by throwing away information above 15k iirc, since the developers believe that we (regular people) don't really hear/care what's going on above there... infact, mp3pro was introduced which sampled info at 22.05KHz which is the nyquist freq of a 10.025KHz cut off but people did start noticing the loss there i guess as that format never got too popular..

 

[cliftonmiles]

Thats interesting, I thought there would be a more elaborate explaination. I will analyze my mp3 mix, rather than a wav and see if that does it! haha

For those that listened to my mix, any constructive criticism?

 

[kramer1309]

umm... why not try comparing your .wav mix with a lossless reference file ?

 

[cliftonmiles]

umm... why not try comparing your .wav mix with a lossless reference file ?

Im not sure what a "lossless reference file" is? Can you explain it to me.

Thanks

 

[kramer1309]

I meant a .wav of .flac of the mix you want to refer to..
Something that doesn't throw away anything with or without compression.

 

[egan.]

Thats interesting, I thought there would be a more elaborate explaination. I will analyze my mp3 mix, rather than a wav and see if that does it! haha

As it turns out, 2 wrongs don't make a right.
Compare wav (or CD) to wav like Kramer said.
If you don't have your reference material on CD now then go buy it on CD. You really want your references to be the best possible quality for pretty obvious reasons. Best luck.