[jaws-uk] Re: IS OGG VORBIS COMPATIBLE WITH JAWS

Hello Steve.

I came across this information on the Vorbis site, which I feel would be 
important to consider  before doing  any changes.

Kind regards.

Mike Partington.

http://www.vorbis.com/faq/#what

Can I convert my MP3 collection to the Ogg Vorbis format? 

You can convert any audio format to Ogg Vorbis. However, converting from one 
lossy format, like MP3, to another lossy format, like Vorbis, is generally a 
bad idea. Both MP3 and Vorbis encoders achieve high compression ratios by 
throwing away parts of the audio waveform that you probably won't hear. 
However, the MP3 and Vorbis codecs are very different, so they each will throw 
away different parts of the audio, although there certainly is some overlap. 
Converting a MP3 to Vorbis involves decoding the MP3 file back to an 
uncompressed format, like WAV, and recompressing it using the Ogg Vorbis 
encoder. The decoded MP3 will be missing the parts of the original audio that 
the MP3 encoder chose to discard. The Ogg Vorbis encoder will then discard 
other audio components when it compresses the data. At best, the result will be 
an Ogg file that sounds the same as your original MP3, but it is most likely 
that the resulting file will sound worse than your original MP3. In no case 
will you get a file that sounds better than the original MP3.

Since many music players can play both MP3 and Ogg files, there is no reason 
that you should have to switch all of your files to one format or the other. If 
you like Ogg Vorbis, then we would encourage you to use it when you encode from 
original, lossless audio sources (like CDs). When encoding from originals, you 
will find that you can make Ogg files that are smaller or of better quality (or 
both) than your MP3s.


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----- Original Message ----- 
From: "Steve Lee" <steve@xxxxxxxxxxxxxxxxx>
To: <jaws-uk@xxxxxxxxxxxxx>
Sent: Sunday, November 23, 2008 1:30 PM
Subject: [jaws-uk] Re: IS OGG VORBIS COMPATIBLE WITH JAWS


> 2008/11/23 Kevin Morris <drewdog101@xxxxxxxxx>:
>> A sighted friend has recommended that I save cassettes (copied to my
>> PC's hard drive) in a format called Ogg Vorbis as it is, in his view a
>> better quality than MP3. Can anyone please let me know whether they
>> have used this format and, if so if it is compatible with Jaws?
> 
> It's an excellent format and can be sonically better than MP3 in
> addition to the ethical/commercial advantages of being patent/royalty
> free.
> 
> As for whether it's compatible with Jaws, I'm nt a jaws user but I
> guess it boils down to a) will Jaws play it (if it plays audio files)
> or b) whether the player you use interferes with Jaws (unlikely as
> plugins are availble for many media players that also play MP3s).
> Hopefully others can give a view based on experience?
> 
> You can get a list of players and find out more at
> 
> http://www.vorbis.com/
> 
> Enjoy
> 
> Steve Lee
> 
>> Many thanks,
>>
>> Kevin
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> 
> 
> 
> -- 
> Steve Lee
> Open Source Assistive Technology Software and Accessibility
> fullmeasure.co.uk
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