Song Building Mode Song Building Mode is good for building rhythmic and drum machine style patterns because you can listen to previously recorded passes while you’re recording the current pass and you can reject passes on-the-fly or mute or solo them. In Song Building mode you may prefer recording each pass onto a separate track using the Replace Record mode, or you may prefer to layer all passes onto one track using the Overdub Record mode. With both Record modes you will hear previous passes. See Using Song Building Mode in Replace, or Using Song Building Mode in Overdub.