Bruno Barreto
2000-Nov-18 10:26 UTC
[vorbis-dev] Sample still has horrorible distortions... anyone know why?
Hi, I am subscribed to this list, and have learned a lot just from the discussions i see although i don't reply to the msgs, simply coz i'm no big deal programmer. I feel, though, that as i'm really optimistic about vorbis and want it to grow and start to have more and more people using it, i feel that i should warn you about a bug the encoder have (i'm sure monty receives loads of known bugs reports). I have posted a msg on the LAME dev board about 2 months or so, and gave the link to the sample. I didn't knew about this board yet :( ... And if i recall right, Monty said he grabbed the file and said it would be taken the proper attention. I fear that he might have had too much samples to try out and might have disregarded this especifically one (??)... I have tested the encoder against A LOT of samples, and no other sample had anything as much noisy as this sample. I mean it. It reeeeally produces bad noises. My intent is to let everyone know what the sample is, and maybe someone will find out what the problem is. The sample's at: http://br.geocities.com/racaflabr/sweep.wav Here's a pic of sweep.wav: http://br.geocities.com/racaflabr/sweep1.jpg Here's a pic of sweep.ogg: http://br.geocities.com/racaflabr/sweep2.jpg Oh btw; i still can hear noise in velvet.wav... Other than that i still consider myself vorbis encoder really effective and it does better than LAME and fraunh in many samples i have here. I'm very optimistic about Ogg Vorbis Project ! 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-dev-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.
Bruno Barreto
2000-Nov-18 12:24 UTC
[vorbis-dev] Sample still has horrorible distortions... anyone know why?
Someone emailed me... Broken link....! argh...! I should have known... Yahoo's way of making money? Having many people subscribe to them. Then when someone builds a page which is giving too many hits or having too many downloads from there and thus using their bandwidth(??), just throw the files out and don't let them upload anything more. After all, what do investors see when they put money in the company? It's not how many downloads one file made but the number of users subscribed. Anyway... Life's not perfect... I put up the files at: www.freedrive.com login: uploadspace100 pass: nopass I'll also put the files on my small FTP just in case: 200.182.233.6 L/P: ogg/vorbis Regards, Machado, Bruno. ----- Original Message ----- From: Bruno Barreto To: vorbis-dev@xiph.org Sent: Saturday, November 18, 2000 4:26 PM Subject: [vorbis-dev] Sample still has horrorible distortions... anyone know why? Hi, I am subscribed to this list, and have learned a lot just from the discussions i see although i don't reply to the msgs, simply coz i'm no big deal programmer. I feel, though, that as i'm really optimistic about vorbis and want it to grow and start to have more and more people using it, i feel that i should warn you about a bug the encoder have (i'm sure monty receives loads of known bugs reports). I have posted a msg on the LAME dev board about 2 months or so, and gave the link to the sample. I didn't knew about this board yet :( ... And if i recall right, Monty said he grabbed the file and said it would be taken the proper attention. I fear that he might have had too much samples to try out and might have disregarded this especifically one (??)... I have tested the encoder against A LOT of samples, and no other sample had anything as much noisy as this sample. I mean it. It reeeeally produces bad noises. My intent is to let everyone know what the sample is, and maybe someone will find out what the problem is. The sample's at: http://br.geocities.com/racaflabr/sweep.wav Here's a pic of sweep.wav: http://br.geocities.com/racaflabr/sweep1.jpg Here's a pic of sweep.ogg: http://br.geocities.com/racaflabr/sweep2.jpg Oh btw; i still can hear noise in velvet.wav... Other than that i still consider myself vorbis encoder really effective and it does better than LAME and fraunh in many samples i have here. I'm very optimistic about Ogg Vorbis Project ! 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-dev-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.
Bruno Barreto
2000-Nov-18 12:47 UTC
[vorbis-dev] Sample still has horrorible distortions... anyone know why?
Someone emailed me... Broken link....! argh...! I should have known... Yahoo's way of making money? Having many people subscribe to them. Then when someone builds a page which is giving too many hits or having too many downloads from there and thus using their bandwidth(??), just throw the files out and don't let them upload anything more. After all, what do investors see when they put money in the company? It's not how many downloads one file made but the number of users subscribed. Anyway... Life's not perfect... I put up the files at: www.freedrive.com login: uploadspace100 pass: nopass I'll also put the files on my small FTP just in case: 200.182.233.6:1250 L/P: ogg/vorbis Regards, Machado, Bruno. ----- Original Message ----- From: Bruno Barreto To: vorbis-dev@xiph.org Sent: Saturday, November 18, 2000 4:26 PM Subject: [vorbis-dev] Sample still has horrorible distortions... anyone know why? Hi, I am subscribed to this list, and have learned a lot just from the discussions i see although i don't reply to the msgs, simply coz i'm no big deal programmer. I feel, though, that as i'm really optimistic about vorbis and want it to grow and start to have more and more people using it, i feel that i should warn you about a bug the encoder have (i'm sure monty receives loads of known bugs reports). I have posted a msg on the LAME dev board about 2 months or so, and gave the link to the sample. I didn't knew about this board yet :( ... And if i recall right, Monty said he grabbed the file and said it would be taken the proper attention. I fear that he might have had too much samples to try out and might have disregarded this especifically one (??)... I have tested the encoder against A LOT of samples, and no other sample had anything as much noisy as this sample. I mean it. It reeeeally produces bad noises. My intent is to let everyone know what the sample is, and maybe someone will find out what the problem is. The sample's at: http://br.geocities.com/racaflabr/sweep.wav Here's a pic of sweep.wav: http://br.geocities.com/racaflabr/sweep1.jpg Here's a pic of sweep.ogg: http://br.geocities.com/racaflabr/sweep2.jpg Oh btw; i still can hear noise in velvet.wav... Other than that i still consider myself vorbis encoder really effective and it does better than LAME and fraunh in many samples i have here. I'm very optimistic about Ogg Vorbis Project ! 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-dev-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.
Bruno Barreto
2000-Nov-18 14:10 UTC
[vorbis-dev] Sample still has horrorible distortions... anyone know why?
Someone emailed me... Broken link....! argh...! I should have known... Yahoo's way of making money? Having many people subscribe to them. Then when someone builds a page which is giving too many hits or having too many downloads from there and thus using their bandwidth(??), just throw the files out and don't let them upload anything more. After all, what do investors see when they put money in the company? It's not how many downloads one file made but the number of users subscribed. Anyway... Life's not perfect... I put up the files at: www.freedrive.com login: uploadspace100 pass: nopass I'll also put the files on my small FTP just in case: 200.182.233.6:1250 L/P: ogg/vorbis Regards, Machado, Bruno. ----- Original Message ----- From: Bruno Barreto To: vorbis-dev@xiph.org Sent: Saturday, November 18, 2000 4:26 PM Subject: [vorbis-dev] Sample still has horrorible distortions... anyone know why? Hi, I am subscribed to this list, and have learned a lot just from the discussions i see although i don't reply to the msgs, simply coz i'm no big deal programmer. I feel, though, that as i'm really optimistic about vorbis and want it to grow and start to have more and more people using it, i feel that i should warn you about a bug the encoder have (i'm sure monty receives loads of known bugs reports). I have posted a msg on the LAME dev board about 2 months or so, and gave the link to the sample. I didn't knew about this board yet :( ... And if i recall right, Monty said he grabbed the file and said it would be taken the proper attention. I fear that he might have had too much samples to try out and might have disregarded this especifically one (??)... I have tested the encoder against A LOT of samples, and no other sample had anything as much noisy as this sample. I mean it. It reeeeally produces bad noises. My intent is to let everyone know what the sample is, and maybe someone will find out what the problem is. The sample's at: http://br.geocities.com/racaflabr/sweep.wav Here's a pic of sweep.wav: http://br.geocities.com/racaflabr/sweep1.jpg Here's a pic of sweep.ogg: http://br.geocities.com/racaflabr/sweep2.jpg Oh btw; i still can hear noise in velvet.wav... Other than that i still consider myself vorbis encoder really effective and it does better than LAME and fraunh in many samples i have here. I'm very optimistic about Ogg Vorbis Project ! 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-dev-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.
Bruno B Machado
2000-Nov-18 14:20 UTC
[vorbis-dev] Sample still has horrorible distortions... anyone know why?
Someone emailed me... Broken link....! argh...! I should have known... Yahoo's way of making money? Having many people subscribe to them. Then when someone builds a page which is giving too many hits or having too many downloads from there and thus using their bandwidth(??), just throw the files out and don't let them upload anything more. After all, what do investors see when they put money in the company? It's not how many downloads one file made but the number of users subscribed. Anyway... Life's not perfect... I put up the files at: www.freedrive.com login: uploadspace100 pass: nopass I'll also put the files on my small FTP just in case: 200.182.233.6:1250 L/P: ogg/vorbis Regards, Machado, Bruno. ----- Original Message ----- From: Bruno Barreto To: vorbis-dev@xiph.org Sent: Saturday, November 18, 2000 4:26 PM Subject: [vorbis-dev] Sample still has horrorible distortions... anyone know why? Hi, I am subscribed to this list, and have learned a lot just from the discussions i see although i don't reply to the msgs, simply coz i'm no big deal programmer. I feel, though, that as i'm really optimistic about vorbis and want it to grow and start to have more and more people using it, i feel that i should warn you about a bug the encoder have (i'm sure monty receives loads of known bugs reports). I have posted a msg on the LAME dev board about 2 months or so, and gave the link to the sample. I didn't knew about this board yet :( ... And if i recall right, Monty said he grabbed the file and said it would be taken the proper attention. I fear that he might have had too much samples to try out and might have disregarded this especifically one (??)... I have tested the encoder against A LOT of samples, and no other sample had anything as much noisy as this sample. I mean it. It reeeeally produces bad noises. My intent is to let everyone know what the sample is, and maybe someone will find out what the problem is. The sample's at: http://br.geocities.com/racaflabr/sweep.wav Here's a pic of sweep.wav: http://br.geocities.com/racaflabr/sweep1.jpg Here's a pic of sweep.ogg: http://br.geocities.com/racaflabr/sweep2.jpg Oh btw; i still can hear noise in velvet.wav... Other than that i still consider myself vorbis encoder really effective and it does better than LAME and fraunh in many samples i have here. I'm very optimistic about Ogg Vorbis Project ! 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-dev-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.
Monty
2000-Nov-19 23:28 UTC
[vorbis-dev] Sample still has horrorible distortions... anyone know why?
Ah, OK, just rechecked these with graphing instead of only listening. Sweep.wav freaked me out at first because I *have* that sample, and it was perfect... It turns out ours are different in that mine is attenuated -2dB. On sweep.wav your problem is clipping. Vorbis is psychoacoustic only and the psychoacoustic engine doesn't know where the 'rails' are. You're feeding in a sample that's going full range all the time, and Vorbis is replicating it to within .5-1 dB... which according to its calculations is enough. Unfortunately, that is causing clipping which looks and sounds pretty bad. Attenuate your sample slightly and you'll see the problem go away. Mechanisms for backfilling more resolution/attenuating the waveform in this case won't be in place until beta 4. Velvet.wav: This sample is hard because it requires short blocks where there's a heavy bassline but little/no lower midrange masking. In short blocks, bin 0 represents roughly 0-350 Hz (almost five octaves!) and thus can require an absurd level of precision where the DC offset is large, but there's no midrange to mask frame boundaries. Beta 3 does not yet have the mechanism to fill the required bits in. (It should still be *much* better than beta 2, but I know it's not yet perfect). 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-dev-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.