How do you fix crackling noise in FL Studio?

Answer 1

Polymphony but you really need a better processor

Polyphony in FL Studio is not a problem if your processor can handle 64 notes per channel. Most computers are capable of this nowadays, even low-end, but if you are hearing a crackling, there are 2 possibilities:

1. There is too much distortion caused by overpeaked synthesis or sample data. To stop this from happening, either use the software buffer of the plugin causing the crackling if hardware can not cope or get a better plugin.
2. The buffer length is too low and cannot handle the sync timing. This is easily fixed and the most common crackling issue. Open audio settings and increase buffer length until there are fewer to no safe overruns.