Using Audacity Labels

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HLS can import Audacity labels to help automate precise beat track creation. First, make sure you have installed the Queen Mary Vamp plugins: http://vamp-plugins.org/download.html

Creating a Label Track in Audacity:


Figure 10.5-1
  • Open Audacity and open your mp3 file.
  • Click Analyze -> Bar and Beat Tracker: Beats...
  • The window shown in Figure 10.5-1 will appear. Select the beats per bar. This will place the specified number of labels for each measure of music. For example, if you choose 4, and there are 4 beats per measure in the song, you will have one label for each quarter note. Setting this to 8 would give you one beat for each eighth note, etc.
  • (Audacity will now analyze the file to determine the beats.)


  • Once complete, you will see the label track that has been created.
  • Click File -> Export Labels.
  • Save the resulting text file.
  • Tip: Create a "Label Tracks" sub-folder in the HLS main folder for saving these files.


Adding the Labels to HLS


Figure 10.5-2
  • Open HLS and either open the sequence that uses that audio, or create a new sequence using that audio.
  • Open Channel Manager (Manage Channels -> Manage Raw Channels).
  • Click Add Control Channel. Figure 10.5-2 will appear.
  • Select "Word" and click OK.
  • Scroll to the word channel and name it something meaningful (such as Audacity). Click Done with Changes.
  • Add the Audacity channel to a display group and make that display group active.
  • Right-click on the first cell in the word channel and select Add Audacity Label Track File.
  • Labels will be added similar to those seen in Figure 10.5-3.
  • Tip: Add the channel to the beat channel group or make it sticky so you can use it as reference.


Figure 10.5-3



HLS User Manual and Reference Guide
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