Update.cs

using System;
using System.Drawing;
using System.Windows.Forms;
using WMPLib;

namespace Spotifly
{
    public partial class Form1
    {
        // Freq * timer.Interval for ms
        private int timesUpdated = 1;

        private readonly int slowUpdateFreq = 27, midUpdateFreq = 5;
        private readonly Timer timer = new Timer();

        private void UpdatesStart()
        {
            timer.Interval = 50;
            timer.Tick += Update;
            timer.Start();
            axWindowsMediaPlayer.settings.volume = Properties.Settings.Default.LastSessionVolume;
        }

        private void Update(object sender, EventArgs e)
        {
            timesUpdated++;
            FastUpdate();
            switch (UpdateTier())
            {
                case 2:
                    MidUpdate();
                    break;

                case 3:
                    MidUpdate();
                    SlowUpdate();
                    break;
            }
            timesUpdated *= Convert.ToInt32(timesUpdated < slowUpdateFreq);

            int UpdateTier()
            {//higher tiers means they repeat less often
                bool tier3 = timesUpdated % (slowUpdateFreq + 0.0) == 0;
                bool tier2 = timesUpdated % (midUpdateFreq + 0.0) == 0;

                int tier = Convert.ToInt32(tier3) * 3
                         + Convert.ToInt32(tier2 && !tier3) * 2
                         + Convert.ToInt32(!tier3 && !tier2);
                return tier;
            }
        }

        private void FastUpdate()
        {
            try
            {
                SetProgressBarValueForCurrentMediaPos();
                string elapsedTime = showRemainingTimeInElapsed ? GetRemainingTimeString() : axWindowsMediaPlayer.Ctlcontrols.currentPositionString;
                ElapsedTimeLabel.Text = string.IsNullOrWhiteSpace(elapsedTime) || string.IsNullOrWhiteSpace(axWindowsMediaPlayer.URL) ? "00:00" : elapsedTime;

                GetColorsForTheme(currentTheme, out _, out _, out _, out Color ButtonColor, out _);
                if (isPlaying && !isPcLocked)
                {
                    if (axWindowsMediaPlayer.playState != WMPPlayState.wmppsPlaying)
                        axWindowsMediaPlayer.Ctlcontrols.play();
                    PlayBttn.Image = SubstituteNotBlankFromImage(Properties.Resources.Pause, ButtonColor);
                }
                else
                {
                    if (axWindowsMediaPlayer.playState != WMPPlayState.wmppsPaused)
                        axWindowsMediaPlayer.Ctlcontrols.pause();
                    PlayBttn.Image = SubstituteNotBlankFromImage(Properties.Resources.Playy, ButtonColor);
                }
            }
            catch
            { }
        }

        private void MidUpdate()
        {

            if (axWindowsMediaPlayer.uiMode != "none" && !axWindowsMediaPlayer.fullScreen)
                axWindowsMediaPlayer.uiMode = "none";
            try
            {

                if (MinimumSize.Width == verticalModeMinWidth && ResizeForMediaCheckBox.Checked && panels[0].Visible)
                {
                    MinimumSize = new Size(normalMinWidth, MinimumSize.Height);
                    SetFormSizeForCurrentMedia();
                }

                VolumeTrackBar.Value = axWindowsMediaPlayer.settings.volume;
                MediaLengthLabel.Location = new Point(Width - (initialMediaLengthLabelDistanceToFormEnd + MediaLengthLabel.Width), MediaLengthLabel.Location.Y);

                if (!isQueued || CheckMediaIndexWithSongQueueCheckBox.Checked)
                    CheckPlaylistIndex();
                
                /*if (axWindowsMediaPlayer.playState == WMPPlayState.wmppsReady || axWindowsMediaPlayer.playState == WMPPlayState.wmppsPaused || axWindowsMediaPlayer.playState == WMPPlayState.wmppsStopped ||
                    axWindowsMediaPlayer.playState == WMPPlayState.wmppsUndefined)
                    PlayBttn.Image = SubstituteNotBlankFromImage(Properties.Resources.Playy, ButtonColor);
                else if (axWindowsMediaPlayer.playState != WMPPlayState.wmppsScanForward && axWindowsMediaPlayer.playState != WMPPlayState.wmppsScanReverse)
                    PlayBttn.Image = SubstituteNotBlankFromImage(Properties.Resources.Pause, ButtonColor);*/

                MediaLengthLabel.Text = axWindowsMediaPlayer.currentMedia.durationString;

                EnableTabIndex(activePanelIndex != 0);
                void EnableTabIndex(bool value)
                {
                    foreach (Control formControl in MainForm.Controls)
                        foreach (Control control in formControl.Controls)
                            control.TabStop = value;
                    PlayBttn.TabStop = true;
                }
            }
            catch
            { }
        }

        private void SlowUpdate()
        {
            MediaListView_DrawMedia(fileFilterMemory);
        }
    }
}