WARNING: Utilizing FX Loop, Send, and Return blocks within the same Helix/HX preset has the potential to cause a feedback loop based on the routing and their position in the signal flow. The volume level and severity of this is feedback loop is dependent upon what is contained within the FX Loops.
We strongly encourage Helix/HX users to use extra caution and awareness when using these blocks in their presets. Specifically avoid placing duplicate send blocks AFTER their corresponding Return in the signal flow. This applies to both FX loop blocks which contain both sends and returns within one block as well as individual send and return blocks.
For example, if your preset contains an FX Loop 1 block (FX Loop L on HX Stomp), which utilizes both Send 1 and Return 1, DO NOT place a Send 1 block AFTER this FX Loop.
The same would apply to using individual send and return blocks. For example, if you have a Send 1 block and a Return 1 block in your preset, DO NOT place a duplicate Send 1 block AFTER the Return 1 block.
Edited by Line6Tony