/// <summary>
        /// Takes part of the specified length of a MIDI file (starting at the beginning of the file)
        /// and returns it as an instance of <see cref="MidiFile"/>.
        /// </summary>
        /// <param name="midiFile"><see cref="MidiFile"/> to take part of.</param>
        /// <param name="partLength">The length of part to take.</param>
        /// <param name="settings">Settings according to which <paramref name="midiFile"/>
        /// should be splitted.</param>
        /// <returns><see cref="MidiFile"/> which is part of the <paramref name="midiFile"/>.</returns>
        /// <exception cref="ArgumentNullException">
        /// <para>One of the following errors occured:</para>
        /// <list type="bullet">
        /// <item>
        /// <description><paramref name="midiFile"/> is <c>null</c>.</description>
        /// </item>
        /// <item>
        /// <description><paramref name="partLength"/> is <c>null</c>.</description>
        /// </item>
        /// </list>
        /// </exception>
        public static MidiFile TakePart(this MidiFile midiFile, ITimeSpan partLength, SliceMidiFileSettings settings = null)
        {
            ThrowIfArgument.IsNull(nameof(midiFile), midiFile);
            ThrowIfArgument.IsNull(nameof(partLength), partLength);

            var grid = new ArbitraryGrid(partLength);

            settings = settings ?? new SliceMidiFileSettings();
            midiFile = PrepareMidiFileForSlicing(midiFile, grid, settings);

            var tempoMap = midiFile.GetTempoMap();
            var time     = grid.GetTimes(tempoMap).First();

            using (var slicer = MidiFileSlicer.CreateFromFile(midiFile))
            {
                return(slicer.GetNextSlice(time, settings));
            }
        }
        /// <summary>
        /// Splits <see cref="MidiFile"/> by the specified grid.
        /// </summary>
        /// <remarks>
        /// Non-track chunks will not be copied to any of the new files.
        /// </remarks>
        /// <param name="midiFile"><see cref="MidiFile"/> to split.</param>
        /// <param name="grid">Grid to split <paramref name="midiFile"/> by.</param>
        /// <param name="settings">Settings according to which file should be splitted.</param>
        /// <returns>Collection of <see cref="MidiFile"/> produced during splitting the input file by grid.</returns>
        /// <exception cref="ArgumentNullException">
        /// <para>One of the following errors occured:</para>
        /// <list type="bullet">
        /// <item>
        /// <description><paramref name="midiFile"/> is <c>null</c>.</description>
        /// </item>
        /// <item>
        /// <description><paramref name="grid"/> is <c>null</c>.</description>
        /// </item>
        /// </list>
        /// </exception>
        public static IEnumerable <MidiFile> SplitByGrid(this MidiFile midiFile, IGrid grid, SliceMidiFileSettings settings = null)
        {
            ThrowIfArgument.IsNull(nameof(midiFile), midiFile);
            ThrowIfArgument.IsNull(nameof(grid), grid);

            if (!midiFile.GetEvents().Any())
            {
                yield break;
            }

            settings = settings ?? new SliceMidiFileSettings();
            midiFile = PrepareMidiFileForSlicing(midiFile, grid, settings);

            var tempoMap = midiFile.GetTempoMap();

            using (var slicer = MidiFileSlicer.CreateFromFile(midiFile))
            {
                foreach (var time in grid.GetTimes(tempoMap))
                {
                    if (time == 0)
                    {
                        continue;
                    }

                    yield return(slicer.GetNextSlice(time, settings));

                    if (slicer.AllEventsProcessed)
                    {
                        break;
                    }
                }

                if (!slicer.AllEventsProcessed)
                {
                    yield return(slicer.GetNextSlice(long.MaxValue, settings));
                }
            }
        }