We describe a method for notifying users through auditory cues embedded in an ambient soundscape in the environment. It uses pieces of music which are composed in such a way, that particular instruments or motifs can be added or omitted without losing the aesthetic quality of the overall composition. This allows for very subtle modiﬁcations in the soundscape which are only noticed by those users who have chosen this particular instrument or motif as "their" notification instrument before. As a side eﬀect, the soundscape itself can be used to subtly influence the mood of users. The method has been implemented in a prototype, which we brieﬂy discuss. The prototype is implemented using a spatial audio framework and can hence notify users from particular directions.
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