Using Audacity Labels

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

HLS_Audacity_Beat-tracker.PNG‎ Creating a Label Track in Audacity:

• Open Audacity and open your mp3 file.
• Click Analyze -> Bar and Beat Tracker: Beats...
• The window shown in image 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. (Perhaps create a "Label Tracks" subfolder in the HLS main folder.)

• 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. Window X-X 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.
• Tip: Add the channel to the beat channel group or make it sticky so you can use it as reference.