Thanks very much for your help. The status bar is perfect for this.
"show the status bar, and click on the speed label to adjust with the slider and the arrows"
To learn an instrument, it is helpful to slow down the tempo individually. After the Download to VLC 2.0.1 this is no more possible. Now you have totally 5 possibilities (Faster, little bit faster, normally, little bit slowlier, slowly). I need it between slowly and a little bit slowlier... Thanks f...