Is money earned from working in wedding celebrations using sound effects from a single device, which does not include the known musical instruments, considered unlawful money?

The ruling on playing sound effects depends on their nature: those that are akin to musical instruments (music) are forbidden, while those that are not are permissible. If the sound effects used are akin to musical instruments, then it is not permissible to play them at weddings or elsewhere, nor is it permissible to take payment for them. However, if they are of the permissible type, then there is no harm in them.