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Sony portable CD players with MP3 and ATRAC support
Sebastian Mares
post Aug 18 2006, 13:34
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Hi!

I know that Sony MD units decode ATRAC files without gaps - does the same apply to their portable CD players? Also, are MP3s decoded properly or does Sony apply certain EQ settings to make the tracks sound worse?

Regards,
Sebastian


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http://listening-tests.hydrogenaudio.org/sebastian/
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nyaochi
post Aug 19 2006, 12:52
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IIRC, LAME's --nogap option is like encoding the entire stream (e.g., the whole CD) in one big MP3 file and splitting the whole MP3 file into individual tracks at MP3 frame positions nearest (or rounding) to the track boundaries. In addition to this, bit reservoir is flushed at the end of each track so that one can play each track independently. The decoded MP3 files are gapless only if a decoder does not re-initialize the internal state (e.g., information for MDCT overlapping) at the beginning of MP3 files.

When --nogap option was introduced into LAME, there were absolutely no approach for gapless playback. The idea to store encoder delay and padding in MP3-Info header was invented afterwards, and MP3-Info is now supported by a number of software players.
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Posts in this topic
- Sebastian Mares   Sony portable CD players with MP3 and ATRAC support   Aug 18 2006, 13:34
- - edwardar   QUOTE (Sebastian Mares @ Aug 18 2006, 13...   Aug 18 2006, 14:06
- - Egor   QUOTE (Sebastian Mares @ Aug 18 2006, 19...   Aug 18 2006, 15:32
- - Sebastian Mares   Well, I already have an MP3 player - the iRiver IM...   Aug 18 2006, 16:04
- - nyaochi   I don't own any Sony players, but saw a number...   Aug 18 2006, 16:39
- - Sebastian Mares   I already tried using --nogap, but it seems that m...   Aug 18 2006, 16:48
- - Cygnus X1   I owned a Sony ATRAC3plus/MP3 CD player about 3 ye...   Aug 18 2006, 17:44
- - Sebastian Mares   OK, no new player then. I might try one when I am...   Aug 18 2006, 22:50
- - Cygnus X1   By the way, the only Sony players I've been ab...   Aug 18 2006, 23:07
|- - grenert   QUOTE (Cygnus X1 @ Aug 18 2006, 14:07) By...   Aug 29 2006, 21:47
||- - maggior   As has been brought up, how the files are encoded ...   Aug 31 2006, 21:49
|- - maggior   QUOTE (Cygnus X1 @ Aug 18 2006, 18:07) By...   Aug 31 2006, 22:02
|- - Mike Giacomelli   QUOTE (maggior @ Aug 31 2006, 14:02) QUOT...   Aug 31 2006, 22:43
- - Sebastian Mares   Well, I have some experience with ATRAC since I us...   Aug 18 2006, 23:10
- - Cygnus X1   I've owned a Hi-MD recorder for a while now, b...   Aug 18 2006, 23:16
- - Sebastian Mares   Most annoying is when listening to Pink Floyd or J...   Aug 19 2006, 00:02
- - Jebus   Lame's --nogap doesn't work/do anything us...   Aug 19 2006, 00:52
- - Sebastian Mares   What exactly does it do anyways? Does it move the ...   Aug 19 2006, 08:43
- - nyaochi   IIRC, LAME's --nogap option is like encoding t...   Aug 19 2006, 12:52
|- - sapibobo   I have ATRAC CD Player D-NE20 and it supports gapl...   Aug 20 2006, 20:24
- - vinnie97   QUOTE Sadly, these are the only portable gapless o...   Aug 31 2006, 22:08
- - maggior   But none of the options mentioned are 1)native (re...   Sep 1 2006, 02:00
- - vinnie97   How many years have you been waiting for such a de...   Sep 1 2006, 06:25
- - pika2000   QUOTE (Sebastian Mares @ Aug 18 2006, 05...   Sep 1 2006, 07:38


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