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Hydrogenaudio Forums > Lossy Audio Compression > AAC > AAC - Tech
on211
Dear friends,
now the latest version of liquid player 6.1 can encode files.
Can everyone know if the quality is beeter that liquifier pro 4 and 5?
Also the sound is beeter that quicktime 6 final?
Thanks a lot.
Nick
wkw
I have only evaluated the liquifier pro 4 and it seems to me, at 96kbits/s stereo,
it still have some problem with certain clips that contained a lot of attacks. I have downloaded this test sample "dmb3, dmb4" and the encoder just could not take it.
Maybe for certain audio clips, the bits demand is just too high and there maybe a need to lower the cut-off frequency.

It is a tough to decide when to cut-off the frequency, because then, for MOST musical clips, it is OK to encode up to the maximum frequency.. Only those that contains a lot of attacks which is not too closely spaced such as a person playing drum would consume a lot of bits.

Perhaps someday, I could upload some of these difficult clips.


kww
Ivan Dimkovic
One note - LiquidAudio bought Dolby's "Consumer AAC Encoder" for the verion 6 - this version is different from encoding engine used in Liquifier 4.x and 5.x.

Dolby claims "performance almost equal to" professional (slow) encoder, with more than 10 times real-time encoding. So, the quality will be sacrificed a bit.
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