message: exporting Mono
  fixes
diff: @@ -10,6 +10,7 @@ export * from "./channel/CrossFade";
  export * from "./channel/Merge";
  export * from "./channel/MidSideMerge";
  export * from "./channel/MidSideSplit";
  +export * from "./channel/Mono";
  export * from "./channel/MultibandSplit";
  export * from "./channel/Panner";
  export * from "./channel/Panner3D";
  