vocals are added by recording to the computer, either most simply through the 7000 microphone and the usb connection at the same time as playing back the sequencer into the audio recorder application, or alternatively by recording directly into the computer soundcard and mixing with the 7000 audio output in a more sophisticated program. The vocal can then be put on the sd card on its own to synchronise with the sequencer, or as a total finished track with full backing, or without a keyboard part to be played live, as audio, or a combination of audio and sequence. The possibilities are many.