Add this function in a subclass to get a notification just before an audio clip is being imported.
This lets you control the import settings trough code.
using System.Collections; using System.Collections.Generic; using UnityEditor; using UnityEngine;
public class MyAudioPostprocessor : AssetPostprocessor { void OnPreprocessAudio() { if (assetPath.Contains("mono")) { AudioImporter audioImporter = (AudioImporter)assetImporter; audioImporter.forceToMono = true; } } }