I remember a few years back some benchmarks showing MP3 was practically better than AAC and OGG for battery life, I got a 4GB Y5 and want to max it out with music, I'm amazed with the quality 64kb/s Nero AAC HE produces however if it significantly reduces battery life I would have to rethink it's application

Any benchmarks around? Even claims?

Although it depends on the actual implementation used in the player, HE-AAC is probably significantly more difficult to decode, due to the replication of high frequencies. I don't know of any numbers or whether MP3 or LC-AAC is faster on portables.

With foobar2000, it's LC-AAC > MP3 > Vorbis > HE-AAC on my computer.

Depends on the decoder and the hardware in question. For a well made flash player though, I would expect some battery hit verses MP3,AAC-LC, or ogg.

As others have said, it all depends on the player. For example, the iPod line isn't really affected whenever a person uses AAC (either VBR, ABR, or CBR) versus using mp3 (either VBR, CBR, or ABR). In fact, my 5G 60GB iPod will last the same amount of time on a single charge when playing 256kbps VBR AAC content and -V 0 mp3s. 128kbps AAC files are also the same as -V 5 encoded Lame mp3 files (or even 128kbps CBR mp3 files).

The best thing that you can do is test the player for yourself. Also make sure that it can actually decode HE-AAC files properly. Any LC-AAC compatible player can technically play any HE-AAC audio file but the HE data will not be decoded, only the LC portion of the file. I did a Google search for "4GB Y5" but couldn't come up with anything other than a old Samsung player the player isn't even listed on their website anymore.

Player is a Samsung YP-S5 (I know, waaay off) I downloaded the manual & it only lists AAC-LC but manual's tend to be vague, I'll try my luck.

If SBR is not supported the high frequencies are missing, right?

Yes. Not that they were genuinely there in the first place.

Cheers, Slipstreem.

Sad that out all these reviews:

http://www.infosyncworld.com/reviews/mp3-p...yp-s5/9268.html

http://www.hardwarecanucks.com/forum/hardw...yer-review.html

http://www.mobile-review.com/mp3/review/sa...-yp-s5-en.shtml

http://www.cnet.com.au/mp3players/mp3playe...39285104,00.htm

Not one actually tested for audio format compatibility

And yeah the highs might not be there but the sound like they are (when SBR is supported)

Well, if a manual goes so far to list LC-AAC in their manual and no other mention of HE-AAC, I am willing to be that the device isn't HE-AAC compatible. This means that the SBR encoded sections will not work and that the resulting HE-AAC file will actually sound worse than a LC-AAC file of that same bitrate. So a 64kbps HE-AAC file decoded on a non-SBR compatible device will sound worse than a LC-AAC file at 64kbps.

So you will probably be better off sticking to LC-AAC or Lame mp3. Then again, you might not be able to hear the difference between a 64kbps being properly played and the song being decoded on a non-SBR compatible device/decoder.

I agree and your probably right, but then common sense would also make you think they would list that the player supports OGG, lol, yet they don't, stooges



I dunno, I guess when I get it, I'll have to encode various formats at 64Kbit and test, WMA10 is my 2nd choice.

From the looks of that, it only supports LC-AAC at bitrates up to 128kbps. That can't be right and standard LC-AAC playback goes up to 320kbps.

Got the unit, plays ogg fine, can't play .m4a at all, I'm guessing it doesn't support the container? What's the Nero commandline option to use .aac?

You can also try renaming the m4a file to mp4 instead. Most AAC compatible devices read mpeg-4 AAC files and not raw AAC files. Also make sure that you are encoding at a bitrate lower than 128kbps and it looks like your device can play AAC audio but nothing higher than 128kbps. As I said, that doesn't seem right but that is what the file compatibility is listed as.