The International Symposium on Musical Acoustics ISMA 2007 is traditionally held just after the ICA - International Congress on Acoustics (under the auspices of the International Commission for Acoustics, ICA). As in the case of the previous conferences in this series, ISMA 2007 will bring together international leaders of the musical acoustics field. Though its dimension is much smaller than the latter, the participation of well-recognised scientists from all over the world ensures a high quality. The choice of Barcelona as hosting city is due not only to the geographical proximity to that of the ICA 2007 in Madrid (http://www.ica2007madrid.org) but also to the fact that there are several local active research groups in this field. Moreover, the conference coincides with the opening of the new Barcelona Museum of Music. A visit to the new museum is included in the regular ISMA program.