[bookport] Re: Related DAISY issue was RE: Re: bookport notplaying last few seconds of mp3 file
- From: "KEITH CREASY" <KCREASY@xxxxxxx>
- To: <bookport@xxxxxxxxxxxxx>
- Date: Mon, 11 Sep 2006 11:10:10 -0400
It sounds like that should have worked. I don't know that we've tested
sending a book that consisted of "wav" files to the BP but we will for
sure.
Thanks.
Keith
>>> tim@xxxxxxxxxxxxxxxx 09/11/06 09:58AM >>>
Re VBR MP3 files and inaccurate BP playback of phrase boundaries:
I produced the DAISY book using the Plextalk PTR2, and recorded each
phrase/section in wave format. I used the PTR2's PC
software to finalise the DAISY book, retaining wave file format, which
I then sent across to the Bookport with BP Transfer.
So, while BP Transfer may have MP3'd the files, they should have been
in wave for each stage of the process prior to transfer.
The current DAISY book is made up of personal affirmations/notes, but -
if it would be of help - I could create a sample book,
using similar processes, and send it for analysis.
Regards
Tim
-----Original Message-----
From: bookport-bounce@xxxxxxxxxxxxx
[mailto:bookport-bounce@xxxxxxxxxxxxx] On Behalf Of KEITH CREASY
Sent: Monday, 11 September 2006 9:07 PM
To: bookport@xxxxxxxxxxxxx
Subject: [bookport] Related DAISY issue was RE: Re: bookport notplaying
last few seconds of mp3 file
Do you know if the MP3 files use "variable bit rate" (VBR)? That would
result in the time offsets being inaccurate, which in tern would
result
in such things as playback not starting exactly on the phrase boundry
or
the last bit of a file not being played. VBR files should never be
used
for DAISY books because they depend on time offsets.
Keith
>>> tim@xxxxxxxxxxxxxxxx 09/08/06 07:47PM >>>
I wonder if its something about the lengths of audio files.
I have a short DAISY book, originally based on about 40 wave files.
The files each last from 3 to 8 seconds in length.
When I play it from start to finish, its fine, but when I move by
phrase (each file appears as a phrase when I press 1 or 3) I
either get some files not playing to completion, or sometimes I hear
the first half second of the subsequent item.
Not sure if these problems are related, and if it's a problem with the
precision of the Bookport Audio hardware when starting
and stopping playback of recorded audio.
Regards
Tim
Tim Noonan
Tim Noonan Consulting Pty Ltd: Excellence in Accessibility and
Usability
+61 419 779 669
tim@xxxxxxxxxxxxxxxx
www.timnoonan.com.au
-----Original Message-----
From: bookport-bounce@xxxxxxxxxxxxx
[mailto:bookport-bounce@xxxxxxxxxxxxx] On Behalf Of Kitty Litter
Sent: Saturday, 9 September 2006 9:27 AM
To: bookport@xxxxxxxxxxxxx
Subject: [bookport] Re: bookport not playing last few seconds of mp3
file
I have noticed this also, they are 32kbit mp3 files and it doesn't
always
happen.
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