What is the ruling on using a DJ at a wedding and playing Islamic anasheed (chants) with the daff (tambourine), given that there is no mixing of genders or other impermissible elements?

There is no impediment to listening to Islamic anasheed (chants) and using a DJ machine at a wedding if the Sharia-compliant controls that permit it are met, because it is merely an amplification of sound. However, if these controls are not met, then it is not permissible to use it, because it becomes a means to what is unlawful.