At this point, many of you have probably heard about the Stems concept from Native Instruments, which allows you to play songs with four parts and isolate each part from one another – for example, removing the drums. While these files are available for purchase on many online stores, until now you needed to use NI hardware and software to isolate the parts and use their power. Today Ean shares how anyone can isolate a Stem file’s individual elements using a simple, free process for Mac and PC, allowing you to create custom instrumentals that will play in any DJ software or hardware.

Hacking Stems / Extracting Instrumentals

Everyone loves the STEM concept, and who has not wanted to break down a track and take out the bass, vocals or drums. In my experience, this is often something that you could do once, and not worry about live. It would make sense then to create a permanent “edit” of your stem that has those parts removed and not bother with isolating things in the DJ set.

Here are the steps you need to take in order to break apart a Stem file and isolate the parts outside of Traktor (or Mixed In Key’s Flow 8 Deck, which is the second DJ software to support Stems playback). First, get your system set up with the right software:

  1. Purchase + download Stems from Beatport, Juno, Traxsource, whatpeopleplay, or Wasabeat (direct links to their Stem sections)
  2. Download Audacity (PC/Mac) and download FFmpeg Library for Audacity (PC/Mac) (both are free)
  3. Go into Audacity’s Preferences > Libraries
  4. Click on “Locate” next to “FFmpeg Library” select “libavformat.55.dylib” which will be contained in the FFmpeg download

Now let’s import the Stem file into Audacity and isolate them:

  1. Import the Stem .MP4 file (it will be fairly large and take a few minutes)
  2. Select all five of the streams (this will include the master stereo mix and each of the four stem parts)
  3. File > Export Multiple in Audacity (use AIFF or WAV and number them so you can keep track)

Full toturial at: Dj Tech Tools 

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