Any audio files first need to be analysed when you import them into Live. If you drag and drop long or a lot of samples into a Live Set at once, this might take quite a while. Not only does it take away time you could use for making music, if you add songs while playing a DJ set, you really can't wait around much.
Luckily it's possible to pre-analyse audio files. During the analysis, Live will create an additional file, the analysis file. It will be saved in the same location as the audio file it refers to and it has the same name with an added .asd extension. Analysis files store data about the audio sample to ensure a good stretching quality, faster waveform display and tempo detection in long samples. A clip's default settings can also be stored in it.
How to pre-analyse multiple audio files:
- Use Live's File Browser to navigate to the folder containing the files to be analysed.
- Right-click (Win) or Ctrl-click (Mac) on the folder, then choose "Analyze Audio" from the context-menu.
Easy enough, isn't it? Any questions or remarks? Hit me with a comment. :)
There are plenty more Ableton Live tutorials where this one came from.