[vorbis] Re: Re: fitting lots of music into 10GB with Vorbis

[Martin Blackwell]

Tested the a cappella of VOICES, under different config options using
speexdrop. The results were good since I couldn't really tell the difference
between the speex file & the CD. Then again, if memory serves, i did find a
realplayer stream of the same track ages ago, and the quality was really
good (like 25kbps). The only thing is, speex only supports up to 16Hz, so
there will be an obvious techincal loss of quality.

----- Original Message -----
From: "Rodrigo Gómez" <rgomez at tsradio.com.mx>
To: <vorbis at xiph.org>
Sent: Saturday, November 02, 2002 1:19 AM
Subject: [vorbis] Re: Re: fitting lots of music into 10GB with Vorbis

<p>> I haven't tryed speex, and, as far as I know, it is a _big_ loosy codec,
> primary developed to voice chats arount the net (where the bandwith is
> important) and not really a high quality codec as Vorbis is.
>
> As others have said, you should try to encode at different rates, and see
> wich suits you better. Try it with the real enviroment you will have,
i.e.,
> with your PA equipment. I have done some tests encoding, for example,
> Sadeness from Enigma, and I can barely tell the difference between the
> original WAV and a vorbis encoded with an average above 100 kbps. And I
can
> certanly say the difference between the original and a MP3 encoded at 192
> kpbs, for example. That depends, of course, of the song.
>
> Another idea that you could try is setting the minimum and maximum values
> for the bitrate in the encoder. Setting a minimum of 0 kbps and a maximum
of
> 256 kbps should give Vorbis a nice window to do the best job it can do (I
> tryed this with the Sadeness song, using 0/500 and it gave an average of
> ~256 kbps), and keep the space in the minimum it needs. Or you could even
> try with 0/500 and see the size. That should give vorbis the ability to
> encode at the highest rate (500) for the complex and hard to encode songs,
> and it could (assuming a-capela song is less complex than an orchestral
song
> for the codec) encode at very low bitrates the simple songs, or the simple
> parts of a song.
>
> So, resuming, I would stick with Vorbis for any kind of song.
>
> I assumed that only in the third world, like here in México, there was
> problems of unemployment. :)
>
> Anyway, maybe you should start encoding... 55 hours of music require a lot
> of time to encode.
>
> Regards,
>
> Rodrigo Gómez
>
> "Martin Blackwell" <djdij at handbags.freeserve.co.uk> escribió en el mensaje
> news:008901c281fa$a858e380$1a814c51 at p1r8t3...
> > I'm english. And unemployed. :P
> > so no chance of getting a new HD for a while.
> > Since I use WA2 as the basis for the gigs i do, is there a speex plugin
i
> > could use should i decide to use speex for a cappela tracks?
> >
> > Anywoo, since i've got nothing to do tonight, and college doesnt start
> again
> > till monday, i'm gonna go thru my collection and re-encode at quality 6.
> >
> > thanx for ur help on this problem ppl
> >
> > PS- i'll send the size reduction results of the same albums i did in
> quality
> > 10 once ive done them.
> >
> >
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