marshallracer wrote:

To be fair, I don't know why it's the way it is currently (except due to heavy client modifications over the past few years) but back in 2010 it wasn't a problem at all it seems
Maps with songs in .ogg format were generally pretty rare, especially considering that rog-limitation is the only example I do know of that is ranked, yet I do not think, except there are some obvious technical issues I do not know of that prevent flawless usage, dropping support for those is not something I'm generally happy about

Monstrata wrote:

I think it's just because peppy doesn't like them?

.ogg hitsounds have been used in the past. same with .mp3 hitsounds, i remember when they were allowed or weren't explicitly disallowed in RC... but i can't give a map for example off the top of my head xp

Endaris wrote:

It is incredibly stupid indeed.
.ogg is unsupported by a lot of software but I wouldn't know why this would keep osu! from using it, as it is an open format afaik and osu! can just ship along the codec.

As we are already on topic it is also worth mentioning this feature request that suggests using the .opus file format: p/5060122

Kyuunex wrote:

https://osu.ppy.sh/b/96375

Arzenvald wrote:

try to convert .bme (bms file and its keysound) in editor, after imported, you'll find out that when you pause the playback, some keysound note doesn't pausing up and keeps playing until it ends

Endaris wrote:

As we are already on topic it is also worth mentioning this feature request that suggests using the .opus file format: p/5060122

abraker wrote:

I was curious enough about this to go out on a hunt to find out why. After searching through the ruins of G&R, GD, and Dev subforums as well as peppy's blog I've found - almost nothing.

Ephemeral wrote:

I vaguely recall issues with accurate timing at a software level and the difficulty of finding an adequate codec for the format being the main reason behind it becoming unsupported.

That and mp3 is 99.9% of all use cases anyway.

Monstrata wrote:

Oh. yea, we don't use .mp3 for hitsounds because there is a 5ms delay before .mp3 hitsounds actually play. It's an internal issue so I don't know why, but I think peppy or someone said not to use .mp3 because there is a delay in play-back. I don't know if this applies to .ogg though

1. FLAC, WAV or any other lossless format should be converted to either Opus or Vorbis in a .ogg container (osu! currently only supports Vorbis, unofficially).
2. Audio from Youtube is natively in Opus format for most videos (while a few use AAC format). If Opus format support is implemented in the game, it should be required to put the audio in a .ogg container (while converting to mp3 should be discouraged, to avoid transcoding quality loss).
3. Sources in .mp3 format with the appropriate bit-rate should be kept as they are in the map. If you need to transcode to reduce the bitrate, it should be converted to Opus or Vorbis in .ogg container.

Ephemeral wrote:

I vaguely recall issues with accurate timing at a software level and the difficulty of finding an adequate codec for the format being the main reason behind it becoming unsupported.

That and mp3 is 99.9% of all use cases anyway.

Max Period wrote:

I made 5 full-keysounded maps (from o2jam) that consist of only ogg hitsounds (everything, including the background music). Go into the editor and see out all the oddities with the editor playback:

-When a long storyboard hitsound was initiated and playback was paused before that hitsound finished, on resuming of playback that long sound will continue to play, even when playback resumed at a different place.
-sometimes the sounds will get completely stuck (multiple stack) and have to restart the editor.

https://osu.ppy.sh/s/414685
https://osu.ppy.sh/s/423422
https://osu.ppy.sh/s/430868
https://osu.ppy.sh/s/445031
https://osu.ppy.sh/s/460855

Also, a commercial DDR clone, known as In The Groove (ITG), based on the stepmania engine, uses .ogg for all of their audios.