GENERATORS
The Audio Clip channel is a special version of the Sampler channels. Some Sampler options are not available to Audio Clip channels (such as loop points, envelopes etc.).
Although you can play the sample in the Step Sequencer or the Piano Roll, the Audio Clip's main purpose is to feed the audio tracks in the Playlist window where you can perform advanced operations such as slicing the audio and rearranging the slices to your preferences.
Each time you drop a new sample in the audio tracks, a new Audio Clip channel is created, and each sample placed in an Audio Clip channel becomes available in the audio tracks.
Normally all new audio clips are inserted in the dedicated Audio Clips group (for more information on groups, see Step Sequencer). It's a good practice to keep the audio clips in separate groups, as you will normally not use the grid or Piano Roll to trigger them.
NOTE: Some features supported by the standard Sampler channels are not supported by the Audio Clip channels. The unsupported features and settings are: Instrument Channel Settings, Function Channel Settings, portamento and polyphony settings and loop points.