[vorbis-dev] FWD: OGG level mismatch

Michael Smith msmith at labyrinth.net.au
Wed Oct 4 08:44:51 PDT 2000



Comments on the following, anyone? This means you, Monty. 
What's causing the gain he's seeing? Is this a matter of codebook
precision, again?

Michael

From: "Arny Krueger" <pcavtech at home.com>
To: <msmith at labyrinth.net.au>
Subject: OGG level mismatch
Date: Wed, 4 Oct 2000 05:11:02 -0400

I just downloaded the OGG 0.4 encoder and OGG 0.1 plug in for Winamp.
  
I found that the combination has a net gain of over +1 dB @ 1 KHz. This means:
  
(1) If I set this up for testing at my www.pcabx.com web site, people are
going to hear a change in the test audio signals when processed by your
product  that they will of course perceive as a defect in your product. + 1
dB is a slam dunk to hear in a DBT, just about everybody will hear it.
Furthermore its not difficult to find highly-compressed, normalized program
material that will sound clipped all the time with your product.
  
(2) If I do technical tests for my www.pcavtech.com web site, then many of
the test signals will be heavily clipped, and again your product will look
like it is highly defective.
  
I'd just as soon not go to the effort to test a product that is this
defective, but people are interested in the OGG product, and are demanding
that I do some tests.
  
If you could correct this quickly and easily, I would prefer to test a less
defective product, if you catch my drift!

--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'vorbis-dev-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.



More information about the Vorbis-dev mailing list