Generally speaking, I can say that Vorbis already has pretty good quality, better then MP3. Mode 6 (~350kbps) - sounds great, no high-frequency artifacts and no pre-echo in any of my 3 test cases (I use 3 tracks as pre-echo test cases: 1. castanets.wav from LAME homepage 2. drums from the begging of the song Metallica - The Small Hours and 3. bass guitar from the begging of the song Primus - My Name Is Mud). Mode 5 (~256kbps) - also sounds great, no high-frequency artifacts and only little pre-echo in my test case 2 (Metallica). Mode 4 (~192kbps) - good quality, little high-frequency artifacts (manifesting in usual manner, sounding like whistles or chirps) and little pre-echo in my test cases. But quality is still better then LAME in both of these aspects. Joint-stereo would probably help here, freeing enough bits to clear away these artifacts. Since I'm pretty keen on quality, I didn't spend much time testing lower modes because I'm interested in bitrates 192-256kbps. Also, even though the ogg files are EXACTLY the same length as the original wav files, I can still hear a tiny <click> between songs that flow into one another. This doesn't happen always, some files come out fine, some have (more or less audible) clicks between them. Someone from this list said a while ago that when you cut the signal abruptly, clicks can happen (something about zero-crossing) and Monty said that this can be easily fixed in decoder, so I'm guessing that this click comes from the decoder side?? I am using oggenc for windows platform and winamp plug-in. Keep up the good work! :) --- >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.
At 13:56 21/08/00 +0200, you wrote:>Also, even though the ogg files are EXACTLY the same length as the original >wav files, I can still hear a tiny <click> between songs that flow into oneHello, I had tested oggenc and WinAMP plugin for windows with my 10 samples WAV file (A click) and WinAMP simply hags up and I need to press stop or close. There is no sound in my speakers. Oggenc seens to do everyting OK. In fact WinAMP playing this 10 samples WAV file hangs in the same way. --- >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.
> Also, even though the ogg files are EXACTLY the same length as the original > wav files, I can still hear a tiny <click> between songs that flow into one > another. This doesn't happen always, some files come out fine, some have > (more or less audible) clicks between them.When going from track to track, the transition is not 'lapped'. frames in Vorbis (like in mp3) are actually overlapping transforms, but between two songs, obviously there is no overlap and because the compression is lossy (nad the us the output an approximation) where there is no smooth overlap, the end and beginning may not match up exactly. One could actually set up the encoder to pay more attention to this to make sure that the approximation *does* match up on the other side...> Someone from this list said a > while ago that when you cut the signal abruptly, clicks can happen > (something about zero-crossing) and Monty said that this can be easily fixed > in decoder, so I'm guessing that this click comes from the decoder side??That's more an issue of a sample ending and then dropping off a digital cliff to zero making a high frequency click. One can smooth that... 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.
> Great. The click between the tracks is pretty small, so this > fix should get it right.Monty, I hope you can update the download binaries with this fix. It is a fairly serious problem and can't really wait for the next beta. --- >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.