[bookport] Re: file naming conventions
- From: "PAMELA RADER" <PRADER@xxxxxxx>
- To: <bookport@xxxxxxxxxxxxx>
- Date: Wed, 03 Jan 2007 15:43:32 -0500
There will be some encoding, such as the Lame encoding as with all MP3
files, but there won't be as much as if you used time compression. In
short, if you don't use Pause Compression, then the file would sound the
same on other devices because they are not altered.
Pamela Rader, TECHNICAL SUPPORT
American Printing House For The Blind
1839 Frankfort Ave.
Louisville, KY 40206
PHONE: 1-800-223-1839, Ext. 307
>>> wb9rsq@xxxxxxxxxx 01/03/07 03:35PM >>>
I did in fact use the send as music option assuming that the transfer
would
be faster.
It was, but only marginally.
Are you saying that no re-encoding is done when that option is
checked?
I fully understand about the time and pause forcing a recode.
I just wanted to make sure that no recode was happening when the music
option is checked.
I have more than 55,000 old radio broadcasts and close to 10,000 of
them are
available in broadcast quality .MP3 that is 160KBPS mono. Sending
them
through the transfer utility adds the indexes which is nice for
jumping
around but if quality suffers then it's better just to copy them via
computer and forget the transfer util.
tnx
-----Original Message-----
From: bookport-bounce@xxxxxxxxxxxxx
[mailto:bookport-bounce@xxxxxxxxxxxxx]
On Behalf Of PAMELA RADER
Sent: Wednesday, January 03, 2007 1:55 PM
To: bookport@xxxxxxxxxxxxx
Subject: [bookport] Re: file naming conventions
Hello:
One other factor here is that whenever you convert those files, if you
use the Pause or Time compression feature in addition to the
conversion,
then the files would be further encoded, which would explain your
finds,
because the quality would change. Before sending the file, you can
either check the "Send audio file as music," which would give you a
more
cleaner MP3 file that is less encoded.
Pamela Rader, TECHNICAL SUPPORT
American Printing House For The Blind
1839 Frankfort Ave.
Louisville, KY 40206
PHONE: 1-800-223-1839, Ext. 307
>>> wb9rsq@xxxxxxxxxx 01/03/07 02:19PM >>>
Thanks Pamela,
I was wondering the same thing but let me toss another question in
there.
I have lots of audio short stories and books in .MP3. I sent a few to
the
BP for testing and then brought copies back to the computer.
I added the _DD file type extension to play in Winamp.
At that point playing the files worked again but the conversion seemed
to
damage the .MP3 info, Id2 tag and the bitrate information.
Finally I thought that there was a change in audio quality as if the
file
had been re-encoded rather than just copied.
File sizes looked close but switching old to BP copy in an a/b/a/b
fashion
seemed to prove that some audio quality had been lost.
Any thoughts or comments?
tnx
-----Original Message-----
From: bookport-bounce@xxxxxxxxxxxxx
[mailto:bookport-bounce@xxxxxxxxxxxxx]
On Behalf Of PAMELA RADER
Sent: Wednesday, January 03, 2007 1:10 PM
To: bookport@xxxxxxxxxxxxx
Subject: [bookport] Re: file naming conventions
Don:
You are correct. For every file you send to the Book Port, there are 3
files that get created. The file that contains the dd extension is
the
actual Data File, thus, the name DD. The other 2 files are for
indexing
and keeping your place in the file if you start and stop, the other
file
is for navigating through paragraphs and such. The Last File file you
mentioned is just what it implies--if that file were not present, then
the Book Port would have trouble knowing when it's at the end of a
folder.
Pamela Rader, TECHNICAL SUPPORT
American Printing House For The Blind
1839 Frankfort Ave.
Louisville, KY 40206
PHONE: 1-800-223-1839, Ext. 307
>>> ka7ojt@xxxxxxxxxxx 01/03/07 01:49PM >>>
Hello,
Inquiring minds want to know. When examining my Bookport
folders, regardless of whether they are audio or text files, I
observed that the file names were changed. Additionally, each
folder contained a file named lastfile.aa. Each of the files
contained an additional extention. Typically, each file was
split into three segments, the first of which had a .aa
extention; the second, a .dd extention; and the third, a .ix
extention.
Am I correct in assuming that this has something to do with the
indexing mechanism for the Bookport?
In the case of the audio files, they were .mp3 files with each
having a playing time of just under one hour. When I say each, I
mean each audio file had this playing time before it was loaded
into the Bookport which incidentally is working extremely well.
Thanks in advance for any info.
Don Roberts
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