A common cause for "cracks" and phasey artifacts is the L/R channels falling out of sync when the plugin is placed on a mono track with stereo output.
Little AlterBoy is latency-intensive. If you hear crackling, increase your DAW's I/O Buffer Size (e.g., from 128 to 512 or 1024 samples). : little alterboy top crack fix mac
Official updates have addressed this. Ensure you are running Soundtoys version 5.3.1 or later , which includes a specific sync fix for Little AlterBoy. A common cause for "cracks" and phasey artifacts