first draft of soundMap to register keys for s

+ refactor sampler to use it
+ refactor synth to use it
+ add 'source' control
+ wip: samples tab
+ wip: webadirt ?
+ wip: soundfonts

packages/core/controls.mjs

@@ -23,6 +23,15 @@ const generic_params = [
    *
    */
   [['s', 'n', 'gain'], 'sound'],
+  /**
+   * Define a custom webaudio node to use as a sound source.
+   *
+   * @name source
+   * @param {function} getSource
+   * @synonyms src
+   *
+   */
+  ['source', 'src'],
   /**
    * Selects the given index from the sample map.
    * Numbers too high will wrap around.