Hi! Today, I found an encoding bug with a new tune by me. http://www.uni-karlsruhe.de/~us87/ogg/vorbis_bassrumble_demo.rar (2.1MB) contains the original .WAV in 16bit/44.1kHz and an .OGG encoded at 350kbit/s. I found the bug when listening to the 128kbit/s version, but encoding it with that high bitrate didn't change a thing. The deep bassdrum contains a rumbling, knocking sound (the first time i heard it i thought someone was knocking my door :) ) in the .ogg, not in the original .wav. In other parts of the song this artifact isn't there, so it must have to do something with the combination of sounds in that part. The cracks and pops in this extract are there on purpose and come from that great ionosphere sample whose URL was posted on vorbis-dev. This artifact cannot be the ionosphere sample's fault only, because as I said, the sample was there in the tune already before the part where this bug is audible. The ionosphere sample is represented pretty good, btw. I hope that helps. If someone needs more info about the demosample, please let me know. Bye, Moritz P.S.: I used the beta4 version of OggDrop for Windows to encode it. --- >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-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
"Moritz Grimm" <maxx@kolabore.de> wrote:> Today, I found an encoding bug with a new tune by me. > http://www.uni-karlsruhe.de/~us87/ogg/vorbis_bassrumble_demo.rar (2.1MB) > contains the original .WAV in 16bit/44.1kHz and an .OGG encoded at > 350kbit/s. I found the bug when listening to the 128kbit/s version, but > encoding it with that high bitrate didn't change a thing. > The deep bassdrum contains a rumbling, knocking sound (the first time i > heard it i thought someone was knocking my door :) ) in the .ogg, not in > the original .wav.Yes I can hear what you are talking about: at the beggining of your clip the deep bassdrum sound is distorted - it's easily audible in -b128 mode and as you go higher the artifact is less present, but even at -b350 it's still pretty audible. Definitely a bug of some sort, since LAME sounds fine. Greetings, Aleksandar --- >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-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
On Sat, Mar 17, 2001 at 02:59:21PM +0100, Moritz Grimm wrote:> Hi! > > > Today, I found an encoding bug with a new tune by me.Thanks for the problem sample. I'll grab it now. I doubt I'll have a chance to check it tonight, but it'll be the first thing I look at as soon as I dig though all this mail ;-) Then we'll know what's wrong and I can put an end to all the wild speculation ;-) Monty --- >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-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.