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 Beatmap Appreciation Team 3,805 posts    |
current rule wrote: The song's audio file must be of reasonable quality. Try and source mp3 files yourself; ripping them from a streaming video site often results in low quality audio with high file sizes. The bitrate of a beatmap's audio file must be no lower than 128kbps and no higher than 192kbps. If you are having trouble acquiring an appropriate audio file, contact one of the more audio-savvy BAT; they will be more than happy to help find an mp3 for you. I just want to add that for VBR mp3s, what matters is the average bitrate, which should be in that range. proposed wording:The song's audio file must be of reasonable quality and must not exceed an average of 192 kbps. Try and source mp3 files yourself; ripping them from a streaming video site often results in low quality audio with high file sizes. If you are having trouble acquiring an appropriate audio file of 128 kbps - 192 kbps, contact one of the more audio-savvy BAT; they will be more than happy to help find an mp3 for you. |
 Rhythm Incarnate 3,706 posts  |
 Beatmap Appreciation Team 7,718 posts  |
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Beatmap Appreciation Team 3,805 posts |
Current rule doesn't mention VBR at all and "bitrate of VBR" doesn't make much sense. My fix is supposed to regulate these as well.
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Beatmap Appreciation Team 7,718 posts |
Common sense is that it needs to be the average of VBR as well, you dont need to be naming everything in there, the rule doesn't even state that it has to be CBR so anyone would figure it's either CBR or VBR
and even if they do heal the scar will remain and nothing will ever be the same |
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Rhythm Incarnate 3,706 posts |
pretty much "average bit rate" summarize all. CBR,VBR and ABR
Quote: The song's audio file must be of reasonable quality. Try and source mp3 files yourself; ripping them from a streaming video site often results in low quality audio with high file sizes. The average bitrate of a beatmap's audio file must be no lower than 128kbps and no higher than 192kbps. If you are having trouble acquiring an appropriate audio file, contact one of the more audio-savvy BAT; they will be more than happy to help find an mp3 for you. Last edited by HakuNoKaemi on , edited 1 time in total.
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 Rhythm Incarnate 3,806 posts  |
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Rhythm Incarnate 3,706 posts |
 Global Moderator 3,139 posts  |
Well.... seeing that VBR is "Variable Bit Rate", I would guess that it goes by the hi & low frequency "peak" in the bit rate where it's most stable (before sound distortion) while including the song's length. Though the other issue with bitrate is how it is compressed like 320 -> 192 ~ 128 is okay, but 128> => 128 ~ 196 is not.
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"If you don't try, you won't learn. If you don't learn, you won't progress." *~ Universal Offset 0 User ~* |
 Rhythm Incarnate 2,492 posts |
someone said don't use VBR for some reason, but I don't remember getting a reason. However it's true that VBR messes up offsets, and takes more processing power. Ogg also has poor support, even though it's better than aac, mp3, and free.
The reason this rule exists is for quality filesize reasons, along with minor other reasons that are just gravy. By forcing lower bitrates, it saves bandwidth regardless, without falling under the "24 MB beatmap" rule. It also should be noted that 192 kbps maximum is a rule, and 128 kbps minimum is a guideline. |
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Beatmap Appreciation Team 3,805 posts |
ziin wrote: By forcing lower bitrates, it saves bandwidth regardless, without falling under the "24 MB beatmap" rule. It also should be noted that 192 kbps maximum is a rule, and 128 kbps minimum is a guideline. It is not. It would make sense as a guideline though. Should I change it this way ? |
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Beatmap Appreciation Team 7,718 posts |
Odaril wrote: ziin wrote: By forcing lower bitrates, it saves bandwidth regardless, without falling under the "24 MB beatmap" rule. It also should be noted that 192 kbps maximum is a rule, and 128 kbps minimum is a guideline. It is not. It would make sense as a guideline though. Should I change it this way ? Do you even know why it's enforced this way to begin with? and even if they do heal the scar will remain and nothing will ever be the same |
 Rhythm Incarnate 600 posts  |
Please pardon my n00b question here: Is the use of 320kbps files strictly forbidden?
I've read the OP excerpt that 128 - 192kbps ones should be used but I've already started mapping quite a bit, so I was wondering if a degradation in audio quality is really necessary. Judging from the fact that there wouldn't be any video in it I seriously doubt it will exceed the 24mb cap. |
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Beatmap Appreciation Team 7,718 posts |
ychao24 wrote: Please pardon my n00b question here: Is the use of 320kbps files strictly forbidden? I've read the OP excerpt that 128 - 192kbps ones should be used but I've already started mapping quite a bit, so I was wondering if a degradation in audio quality is really necessary. Judging from the fact that there wouldn't be any video in it I seriously doubt it will exceed the 24mb cap. Yes anything higher than 196 is strictly forbidden for the reason that peppy doesn't want to distribute lossless nor semi lossless through osu! and even if they do heal the scar will remain and nothing will ever be the same |
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Beatmap Appreciation Team 3,805 posts |
ychao24 wrote: Please pardon my n00b question here: Is the use of 320kbps files strictly forbidden? I've read the OP excerpt that 128 - 192kbps ones should be used but I've already started mapping quite a bit, so I was wondering if a degradation in audio quality is really necessary. Judging from the fact that there wouldn't be any video in it I seriously doubt it will exceed the 24mb cap. The rule says must. And yes, the use 320 kbps is strictly forbidden. And this rule isn't about filesize. Using 320 kbps mp3s means we'd be distributing lossless mp3s all over the internet for free. EDIT: ninja'd by Sakura |
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