/// <summary>
        /// Loads our data
        /// </summary>
        /// <param name="pathIN"></param>
        /// <returns></returns>
        public static IEnumerator LoadData(string pathIN, System.Action <MusicGeneratorData> callback)
        {
            string data = null;

            yield return(MusicHelpers.GetUWR("/MusicGenerator/InstrumentSaves/" + pathIN + "/generator.txt", (x) => { data = x.downloadHandler.text; }));

            MusicGeneratorData generatorData = JsonUtility.FromJson <MusicGeneratorData>(data);

            // Version check and update.
            if (generatorData.mVersion != MusicGenerator.Version)
            {
                ChordProgressionData chordSave = new ChordProgressionData();
                string persistentDir           = MusicFileConfig.GetPersistentSaveDirectory(pathIN);

                // apply the needed changes for version 1.1. was null before.
                if (generatorData.mVersion == 0.0f)
                {
                    string generatorSaveData = null;
                    yield return(MusicHelpers.GetUWR("/MusicGenerator/InstrumentSaves/" + pathIN + "/generator.txt", (x) => { generatorSaveData = x.downloadHandler.text; }));

                    GeneratorSave generatorSave = JsonUtility.FromJson <GeneratorSave>(generatorSaveData);

                    generatorData.mDistortion         = new Pair_String_Float("MasterDistortion", generatorSave.mDistortion);
                    generatorData.mCenterFreq         = new Pair_String_Float("MasterCenterFrequency", generatorSave.mCenterFreq);
                    generatorData.mOctaveRange        = new Pair_String_Float("MasterOctaveRange", generatorSave.mOctaveRange);
                    generatorData.mFreqGain           = new Pair_String_Float("MasterFrequencyGain", generatorSave.mFreqGain);
                    generatorData.mLowpassCutoffFreq  = new Pair_String_Float("MasterLowpassCutoffFreq", generatorSave.mLowpassCutoffFreq);
                    generatorData.mLowpassResonance   = new Pair_String_Float("MasterLowpassResonance", generatorSave.mLowpassResonance);
                    generatorData.mHighpassCutoffFreq = new Pair_String_Float("MasterHighpassCutoffFreq", generatorSave.mHighpassCutoffFreq);
                    generatorData.mHighpassResonance  = new Pair_String_Float("MasterHighpassResonance", generatorSave.mHighpassResonance);
                    generatorData.mEchoDelay          = new Pair_String_Float("MasterEchoDelay", generatorSave.mEchoDelay);
                    generatorData.mEchoDecay          = new Pair_String_Float("MasterEchoDecay", generatorSave.mEchoDecay);
                    generatorData.mEchoDry            = new Pair_String_Float("MasterEchoDry", generatorSave.mEchoDry);
                    generatorData.mEchoWet            = new Pair_String_Float("MasterEchoWet", generatorSave.mEchoWet);
                    generatorData.mNumEchoChannels    = new Pair_String_Float("MasterNumEchoChannels", generatorSave.mNumEchoChannels);
                    generatorData.mReverb             = new Pair_String_Float("MasterReverb", generatorSave.mRever);
                    generatorData.mRoomSize           = new Pair_String_Float("MasterRoomSize", generatorSave.mRoomSize);
                    generatorData.mReverbDecay        = new Pair_String_Float("MasterReverbDecay", generatorSave.mReverbDecay);

                    generatorData.mGroupRate = (eGroupRate)generatorSave.mGroupRate;

                    // We also need to create a chord progression data object:
                    chordSave.mExcludedProgSteps   = generatorSave.mExcludedProgSteps.ToArray();
                    chordSave.SubdominantInfluence = generatorSave.mSubdominantInfluence;
                    chordSave.DominantInfluence    = generatorSave.mDominantInfluence;
                    chordSave.TonicInfluence       = generatorSave.mTonicInfluence;
                    chordSave.TritoneSubInfluence  = generatorSave.mTritoneSubInfluence;
                }
                else if (generatorData.mVersion == 1.1f)
                {
                    string generatorSaveData = null;
                    yield return(MusicHelpers.GetUWR("/MusicGenerator/InstrumentSaves/" + pathIN + "/generator.txt", (x) => { generatorSaveData = x.downloadHandler.text; }));

                    GeneratorSave generatorSave = JsonUtility.FromJson <GeneratorSave>(generatorSaveData);

                    generatorData.mGroupOdds.Clear();
                    for (int i = 0; i < generatorSave.mGroupOdds.Count; i++)
                    {
                        generatorData.mGroupOdds.Add(generatorSave.mGroupOdds[i]);
                    }
                }
            }

            callback(generatorData);
            yield return(null);
        }