GtkWidget *volumen = gtk_volume_button_new();
GtkAdjustment *ajuste = gtk_adjustment_new(50,0,100,1,0,0);
gtk_scale_button_set_adjustment(GTK_SCALE_BUTTON(volumen),ajuste);
The problem i have is the icon, the icon shows mute at the beginning of the app, not the 50% of volumen icon