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I think that AAC at 80kbps gives good quality to hear at a portable mp3 player such as the W800/K750, at 64kbps i can hear the noticeable lack of high and low sounds.
IMO if you use your w800 at streets, subway, car, etc (noise enviroments) you can use lower bitrates cause your whole atention is not on the song and the external noise reduces quiality aswell. Using it to hear music at work, home, connecting it to hi-fi sound systems may require higher bitrates.
For me its 80kbps in most of the songs and some at 128kbps in my W800. In my pc 198kbps or 320kbps
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Posted: 2005-11-08 22:17:38
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Does w800 support aac plus (HE)? is battery usage different with different formats ?
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Posted: 2005-11-09 00:41:41
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I think the quality of these compressed music depends on a lot of things.
1. quality of source
2. type of music / sound
3. quality of encoder
4. quality of decoder / player
5. quality of sound processor (sound card / amplifier)
6. quality of speakers
7. quality of listener's ears
I think the last one is the most important factor specially in the case of mp3 / mp4 / ogg vorbis or any format that uses psycho-acoustic methods of picking and eliminating significant / insignificant sounds -- the compression technique used are dependent on the average human brain's perception to sound -- so there's no definite bitrate or compression method that could be considered the best or practical.
Whatever settings you use for a rock song may not necessarily work well for a jazz or an orchestral classical piece. Your settings for your Yanni compilation may be an overkill for your Beastie Boys collection, etc, etc... IMHO
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Posted: 2005-11-09 02:26:59
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I agree blackspot, good point. Many factors contribute. Here's my assessment:
1. quality of source
Use CD where ever possible, however I find dbpoweramp and itunes both transcode from mp3's very well. A good quality 128Kbps mp3 transcoded to 96Kbps aac is very close (of course you cannot go "up". A 128Kbps mp3 ripped to 192Kbps is no better than the original mp3)
2. type of music / sound
Complex music pieces or deep base seem to be the most demanding music to encode (that's a gross generalisation)
3. quality of encoder
DBPoweramp in my view awesome, as good as itunes but smaller file sizes.
4. quality of decoder / player
Well the decoder in this instance is on the K750 (for me anyway) and it seems just as good as itunes on my laptop.
5. quality of sound processor (sound card / amplifier)
Again in this case we are talking the on-chip processor of the K750, seems well and truly up to the job, although could do with more power output.
6. quality of speakers
I am using the earbuds of the HPM-70, or my suround sound system at home. Through the sound system it's shit hot, and amplified!
7. quality of listener's ears
Well, not as good as some, but I can tell difference between about 5-10Kbps variance in bitrates, however I expect some of the higher and lower frequencies don't reach my brain at all
(comes from having enjoyed loud music most of my life)
Note: the poster who asked about aac+; it's not supported by W800
, but is supported by W900.
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Posted: 2005-11-09 04:11:15
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Have you read the K750 white paper?
It's available here:
http://developer.sonyericsson[....]ls/phonespecs/p_phonespecs.jsp
and includes on page 39:
Formats Audio
MP3 (192 kbit/s for local playback)
MP4
M4A
3GP(Audio encoded in AAC or AMR)
AMR
WAV
G-MIDI (level 1 with 40 voices polyphony)
I'm not sure what exactly is meant by that. May it be that 192kbit/s is the best that K750 can do and higher bitrates don't give any better sound?
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Posted: 2005-11-09 09:36:30
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Not to deviate much from the subject but has anyone tried AMR-WB on the K750? I had some movies I had encoded using the Nokia Multimedia Converter 2 and they worked fine on my old Moto E1000 but I could not hear sound on my K750. When I re-encoded them without WideBand they worked fine.
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Posted: 2005-11-09 15:53:08
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