The YAWTb toolbox: Yet another wavelet toolbox. The aim of this toolbox is to provide a clear and well documented implementation in Matlab of some time-frequency and time-scale transformations like the well known continuous/discrete wavelet transforms. One of the major difference with other wavelet toolboxes is that YAWTB is released under GPL which means that people interested in its development are welcome. The main features of Yawtb are: continuous and discrete wavelet transform; easy visualization; modular programming; use of external routines written in C/C++ for efficiency.