[vorbis-dev] PreBeta4/First Results

Monty
Wed, 24 Jan 2001 11:54:25 -0000

> My results are:
>
> -b 100: 111 kbps. sound quality is inacceptable, sounds a little like an
> old tape to me
> -b 112: 104 kbps, sounds ok for the bitrate/full stereo

These should be the same mode... unless Segher's mode_S is compiled
in, which it shouldn't be because it's broken.  Are these the
downloads Jack made?

> -b 128: 124 kbps, sounds a little "flat"

Yeah, the different modes are mainly the amount of 'bit depth' that
gets encoded.  Sort of like a false bottom to the audio, so the
impression that some depth got removed is accurate.

(More accurately, strong tones in beta 4 are usually encoded at
full/near-full resolution, and 'noise' has the depth limited. The
100-110 kbps mode limits tone resolution too.)

> The encoder tripled in speed compared to beta3 on my duron 700.

Ahh, good to know.

> I'm still waiting for the channel-coupling to compare the results to
other
> formats in a fair way :)

I can't wait either, but this isn't something that I'm going to rush
;-)

Thanks for taking the time to test it.

Monty