Tag Archives: ogg

Stem based mixing coming your way soon?

Dj Challenge in progress

One of the killer ideas which came out of the Mozilla Festival in the Dj challenge was the idea of Stem based mixing

The idea is great and I think there’s plenty of momentum behind it. Daniel James and Fin Stamp worked this idea through and now there’s a post on the Mixxx forums. Here’s the details of the post…

At the Mozilla Festival in London last weekend, I took part in a Hack the DJ workshop, looking at ways to take digital DJ’ing to the next level. One of the ideas proposed was stem mixing, using multichannel files in DJ applications. A proprietary implementation of this idea is Fireplayer but this app is built with the intention that users will buy remixable versions of (a very limited number of) well-known songs from an in-app store. I would like to work towards a new open standard for stem mixing, something that is compatible with sharing our mixes on the open web – legally, of course – but could also be used by record labels that sell tracks to DJs.

For example, eight channel Ogg Vorbis files where the first two tracks are a stereo mix of the drums, third and fourth stereo bass, fifth and sixth stereo vocals, and seventh and eighth tracks everything else. This means that you can mute or solo individual stems in the mix, giving you the versatility of four-deck or eight-deck mixing but without the problems of keeping many decks in sync, since the stems within a single file are locked on the same timeline. Also, it makes using the mixer a lot simpler than for many-deck mixing, because you don’t need to keep assigning the crossfader to the various different decks.

Of course this means that the eight channel .ogg file has to be prepared specially for DJ’ing, but this is already possible in Audacity. So we have a file format, and an editor, but what we don’t yet have is full support for stem mixing in open source DJ applications. Sweep supports scratching on eight-channel files, but it doesn’t have a mixer. Mixxx has a mixer, but doesn’t support multichannel Ogg files (yet), as far as I can see.

So, what do you think? Is stem mixing a genuinely useful feature that will allow DJs to be more creative, or will it fail if the best music continues to be available in stereo only? Please add your comments below

I like to think this could be massive thing because although you might be able to get the Stem’s of a tune if your a international superstar dj and have contacts in high places. But if your just a bedroom dj or even play out quite a bit but not a popular name, getting access to the stems of a tune is near impossible.

In fact what were trying to do is standardise the format, so it means the bedroom producers and the massive music businesses can compete on a level platform. This might strike fear into some but when the stereo track is no more and everyone is expecting the Stems of the track as standard, then you will have to go along with it.

Ogg Vorbis is a great starting point and knowing it can support up to 200+ tracks is great for future capability. There are a ton of questions of how it works for a Dj but its certainly a challenge which will be fun to have. I just hope we can stay away from the logic/alberton type interface…

Can’t wait to mix with Stem’ed Ogg Vorbis files…!