Little Help with testing audio Quality...

[kotuwa]

A small test... do not take more than 15 minutes....
Asking this since my hardware and my ear is not that good to decide!...
This is an odd request... :)
This would look like stupid, unnecessary or time wasting...
If so, then ignore.. don't waste ur time ;)


I have 4 audio samples... Named A1,A2,B1,B2.

I would like marks for each from 0 to 100.
and a little comparison.
Like A1 with A2... an B1 with B2....
and..... A1 with B1 and A2 with B2....
If you can, test them under 2 audio setup. 2 modes... in 6 channel mode... and in stereo mode...

None of these are HIGH QUALITY...
They are MEDIUM (I hope) or LOW quality.

Files with A in name are 2.0 and files with B are 5.1.
In files with 2 in name are Dynamic Range Compression applied.

Just 14 MiB... zip file.. 4 aac files inside...
http://db.tt/E8KHSrSx

Thank you :thanks:

[foxyshadis]

Whatever you're using to do DRC sounds horrible. At the same bitrate they should sound similar, but the DRC versions sound like half the bitrate. I don't know how that could happen.

The 6 channel audio is more like 3 channel (stereo + center), I get nothing out of the rear or sub. The 2-ch DPL and the 6-ch both sound pretty good, though I get slightly more high frequency artifacts out of the former.

On headphones, the two channel is almost unlistenable, whether expanded or kept as stereo. The artifacts are just too obvious. The 6-channel is fine, having double the bitrate really helps significantly. After a few repeats, I started getting used to the 2-channel as well...

Mooooooo!

[kotuwa]

Thank you very much foxyshadis !...

Im little confused...
About below quoted parts,

The 2-ch DPL and the 6-ch both sound pretty good, though I get slightly more high frequency artifacts out of the former.

On headphones, the two channel is almost unlistenable, whether expanded or kept as stereo. The artifacts are just too obvious. The 6-channel is fine ...

Does it mean DPL one sounds better in 6 channel but not good as stereo?

:confused:

[kuchikirukia]

The Dolby seems to be destroying a lot. Try a straight downmix. The stereo channels are mostly positional fill.

I get nothing out of the rear or sub.

The sub is there. But Audacity says the track can be amplified by 10.9dB without clipping, so...