You can also play the corresponding key with musical typing or a connected USB or MIDI keyboard. To listen to the sounds, click the listen button on the pad.To add sounds from the Logic Pro Library, click the pad, click the Library button in the toolbar, then choose a category and a sound.Drag multiple audio files or regions at once-each audio file is automatically assigned to its own pad.The sound is set for one-shot playback, which you can change within the Drum Machine Designer. Drag an audio file like a WAV, AIFF, or an MP3 file from the Finder or any of the browsers in Logic Pro, or a region from the Tracks area to a pad.You can add sounds to a pad several different ways:.If you want to start with an empty kit, click the Click the Action pop-up menu, then choose Clear All Pads. In Logic Pro, click DMD in the Instrument slot of a channel strip to open the Drum Machine Designer window.You can also open Drum Machine Designer and add samples in the instrument itself: The sample is added to an empty pad in the kit. You can add a sound to your Drum Machine Designer kit by simply dragging a sample to the track header for the track.