One of the main reasons the Roland SP-404 sampler is so popular is its effects section which sounds great and is very recognisable. If you’re Ableton Live (10.1 or above) user you don’t need the actual sampler to get the essence of the SP’s effects. Just grab my free (or pay-what-you-want) SP-404 FX Rack, map it to your favourite controller and go crazy!
I’ve used the stock Ableton Live devices to create effects similar to the SP-404’s DJ FX Looper, Vinyl Sim, Lo-Fi, Isolator, Reverb, Filter + Drive, and Tape Delay.