The Hobby, Skill, and Career of Piano Tuning

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[text_block style=”style_1.png” align=”left”]Tune A4 Using F2 – Level 1

F2 has been set flat so that it produces beats when it is played with A4 or the fork.

You have to tune A4 so that the beat speed produced when F2A4 is played, is the same speed as the beat speed produced when F2Fork is played.

Remember from the F2 Check Note lesson that this means that A4 and the fork are both the same amount sharp of the 5th partial of F2, hence they are the same pitch. If you don’t understand this, spend some time trying to figure it out. It’s important.

In other words, make F2A4 = F2Fork.

The beating you will hear is at A4.

In this level, you will see the beat speed displayed on the screen.

Just tune A4 until the beat speed of F2A4 = 4.4 bps, which is the beat speed of F2Fork.

You will also hear the beat speed filtered around A4 so that it is easier to hear.

I have also added the buttons for F2Fork and F2A4 unfiltered, so that you can start trying to hear the filtered beat within the unfiltered waveform. Use them to practice.[/text_block]

[text_block style="style_1.png" align="left"]<strong>Tune A4 Using F2 – Level 1</strong></p>
<p>F2 has been set flat so that it produces beats when it is played with A4 or the fork.</p>
<p>You have to tune A4 so that the beat speed produced when F2A4 is played, is the same speed as the beat speed produced when F2Fork is played.</p>
<p><em>Remember from the F2 Check Note lesson that this means that A4 and the fork are both the same amount sharp of the 5th partial of F2, hence they are the same pitch. If you don't understand this, spend some time trying to figure it out. It's important.</em></p>
<p>In other words, make F2A4 = F2Fork.</p>
<p>The beating you will hear is at A4.</p>
<p>In this level, you will see the beat speed displayed on the screen.</p>
<p>Just tune A4 until the beat speed of F2A4 = 4.4 bps, which is the beat speed of F2Fork.</p>
<p>You will also hear the beat speed filtered around A4 so that it is easier to hear.</p>
<p>I have also added the buttons for F2Fork and F2A4 unfiltered, so that you can start trying to hear the filtered beat <em>within</em> the unfiltered waveform. Use them to practice.[/text_block]

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[custom_html]

		Beat Speed:	4.4 bps
		Beat Speed:
	Raise and lower A4 until F2A4 is the same speed as F2Fork, i.e. 4.4bps.

You need to get 100% (i.e. within 0.5 cents) to go to the next lesson.

[/custom_html]

[custom_html]<table>

<tr>
<td rowspan="4"></td>
<!--[Play] buttons-->
<td style="text-align: center;"><input type="button"  class="button" value="Play F2Fork Filtered" />
<input type="button"  class="button" value="Play F2Fork Unfiltered" /></td>
<!--1st Beat Speed text-->
<td style="text-align: center;">Beat Speed:</td>
<!--1st Beat Speed value-->
<td style="text-align: center;">4.4 bps</td>
</tr>
<tr>
<td style="text-align: center;"><input type="button"  class="button" value="Play F2A4 Filtered" />
<input type="button"  class="button" value="Play F2A4 Unfiltered" /></td>
<!--2nd Beat Speed text-->
<td style="text-align: center;">Beat Speed:</td>
<!--2nd Beat Speed value-->
<td style="text-align: center;">
<p id="f2a4bps"></p>
</td>
</tr>
<!--Tuning buttons-->
<tr>
<td style="text-align: center;" colspan="3"><input type="button"  class="button" value="Raise A4" />
<input type="button"  class="button" value="Lower A4" />
<!--Tuning instructions-->
<h4>Raise and lower A4 until F2A4 is the same speed as F2Fork, i.e. 4.4bps.</h4>
</td>
</tr>
<!--[Score] button-->
<tr>
<td style="text-align: center;" colspan="5"><input type="button"  class="button" value="Score" /></td>
</tr>
<!--Criteria text-->
<tr>
<td colspan="5">
<h4></h4>
<center>You need to get 100% (i.e. within 0.5 cents) to go to the next lesson.</center></td>
</tr>
</tbody>
</table>[/custom_html]

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[custom_html][/custom_html]

[custom_html]<script>
//Variables

var i //i is the random variable
var j //j is the array pointer

//WAVEFORMS


//F2Fork - filtered and unfiltered
f2Forkf = "http://howtotunepianos.com/wp-content/uploads/2016/08/F2Forkf.mp3"
f2Fork = "http://howtotunepianos.com/wp-content/uploads/2016/08/F2Fork.mp3"


//F2A4 filtered
var f2A4f = [
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-5f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-4.5f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-4f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-3f.5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-3f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-2.5f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-2f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-1.5f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-1f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-0.5f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A40.5f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A41f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A41.5f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A42f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A42.5f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A43f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A43.5f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A44f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A44.5f.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A45f.mp3"
];

//F2A4 unfiltered
var f2A4 = [
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-4.5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-4.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-3.5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-3.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-2.5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-2.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-1.5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-1.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4-0.5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A4.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A40.5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A41.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A41.5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A42.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A42.5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A43.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A43.5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A44.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A44.5.mp3",
   "http://howtotunepianos.com/wp-content/uploads/2016/08/F2A45.mp3"
   
];

var bps = [
    "3.1 bps",
    "3.2 bps",
    "3.4 bps",
    "3.5 bps",
    "3.6 bps",
    "3.7 bps",
    "3.8 bps",
    "4.0 bps",
    "4.1 bps",
    "4.3 bps",
    "4.4 bps",
    "4.5 bps",
    "4.6 bps",
    "4.8 bps",
    "4.9 bps",
    "5.0 bps",
    "5.1 bps",
    "5.3 bps",
    "5.4 bps",
    "5.5 bps",
    "5.6 bps"
    ];

var cents = [
    "-5.0",
    "-4.5",
    "-4.0",
    "-3.5",
    "-3.0",
    "-2.5",
    "-2.0",
    "-1.5",
    "-1.0",
    "-0.5",
    "0.0",
    "+0.5",
    "+1.0",
    "+1.5",
    "+2.0",
    "+2.5",
    "+3.0",
    "+3.5",
    "+4.0",
    "+4.5",
    "+5.0"
    ];
  
var mark = [
    "-64 %",
    "-44 %",
    "-24 %",
    "-4 %",
    "16 %",
    "36 %",
    "56 %",
    "76 %",
    "96 %",
    "100 %",
    "100 %",
    "100 %",
    "96 %",
    "76 %",
    "56 %",
    "36 %",
    "16 %",
    "-4 %",
    "-24 %",
    "-44 %",
    "-64 %"
    ];


//Randomly choose first A4
  
    m = Math.random();
    m = m * 6;

    m = Math.floor(m);

//m is now 0, 1, 2, 3, 4, or 5
//map n as such 0->0, 1->1, 2->2, 3->18, 4->19, 5->20.
//This randomly puts A4 far away from A440, higher or lower.

switch (m) {
    case 0:
        n = 0;
        break;

    case 1:
        n = 1;
        break;

    case 2:
        n = 2;
        break;

    case 3:
        n = 18;
        break;

    case 4:
        n = 19;
        break;

    case 5:
        n = 20;
        break;
        
};
   
//Output note's pitch to the webpage as the beats per second with F2.

document.getElementById("f2a4bps").innerHTML = bps[n];

//FUNCTIONS
   
    function playF2Fork(){
        
//Define the wave file to be played                
        track1 = new Audio(f2Fork);

//Play the wave file
        track1.play();
    };
    
    
    function playF2Forkf(){
        
//Define the wave file to be played                
        track1 = new Audio(f2Forkf);

//Play the wave file
        track1.play();
    };
    
       
    function playF2ForkA5f(){
        
//Define the wave file to be played                
        track1 = new Audio(f2ForkA5f);

//Play the wave file
        track1.play();
    };
           
    function playF2A4(){
        
//Define the wave file to be played                
        track1 = new Audio(f2A4[n]);

//Play the wave file
        track1.play();
    };
    

           
    function playF2A4f(){
        
//Define the wave file to be played                
        track1 = new Audio(f2A4f[n]);

//Play the wave file
        track1.play();
    };


//j is the array variable pointer

       
    function raiseA4(){

//Get A4 to move 0(20%), 1(60%), or 2(20%) places. Prioritize moving 1 place.

        var x = Math.random();
        x = x*10;
        x = Math.floor(x); 
        
        if (x >= 0 && x < 2 ) { x = 0; } if (x >= 2 && x < 8 ) { x = 1; } if (x >= 8 && x < 10 ) { x = 2; } n = n + x; if (n>20) {n = 20;}
    
//Display F2A4 beat speed

        document.getElementById("f2a4bps").innerHTML = bps[n];

//Define the wave file to be played                
        track1 = new Audio(f2A4f[n]);

//Play the wave file
        track1.play();

    };
    
       
    function lowerA4(){

//Get A4 to move 0(20%), 1(60%), or 2(20%) places. Prioritize moving 1 place.

        var x = Math.random();
        x = x*10;
        x = Math.floor(x); 
        
        if (x >= 0 && x < 2 ) { x = 0; } if (x >= 2 && x < 8 ) { x = 1; } if (x >= 8 && x < 10 ) {
        x = 2;
        }
        
        n = n - x;
        if (n<0) {n = 0;}
            
//Display F2A4 beat speed
        document.getElementById("f2a4bps").innerHTML = bps[n];

//Define the wave file to be played                
        track1 = new Audio(f2A4f[n]);

//Play the wave file
        track1.play();

    };
    
    
        function score(){

//Display mark
        alert("Your ScorenMark: " + mark[n] + "nA4 = " + cents[n] + " cents");
        
//Send to next lesson if meets criteria
        if (mark[n]==="100 %") {
            alert("Congratulations on getting 100%nYou will now be directed to the next level");
            window.location.assign("http://howtotunepianos.com/ear-training-for-piano-tuners-tuning-a4-exercise-4b/")
        } else {
            alert("Sorry.nYou need to get 100% to go to the next lessonnTry again.");
            alert("Remember, just make F2A4 = 4.4 bps.nYou don't even have to listen to the sound!");
            location.reload();
        };
        
    };
    
   
   </script>[/custom_html]

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