Now, you have to tune A3A4 as a pure 4:2 by making the M3 beat the same as the M10, but you can't see the M3 speed in bps. You can, however, still get the filtered M3 and M10 speed.

Play A3A4

Play the M3, F3A3 M3 filtered

Play the M10, F3A4 M10 filtered

Raise A3

Lower A3

CHECK

Your results will be posted here.

[tcb-script] var f3a4 = "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a4test2.mp3";var f3a4f = "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a4test2f.mp3";var a3a4 = [ "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n1a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n2a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n3a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n4a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n5a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n6a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n7a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n8a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n9a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n10a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n11a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n12a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n13a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n14a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n15a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n16a.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/a3a4n17a.mp3" ];var f3a3 = [ "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n1.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n2.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n3.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n4.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n5.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n6.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n7.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n8.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n9.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n10.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n11.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n12.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n13.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n14.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n15.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n16.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n17.mp3" ];var f3a3f = [ "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n1f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n2f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n3f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n4f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n5f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n6f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n7f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n8f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n9f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n10f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n11f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n12f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n13f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n14f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n15f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n16f.mp3", "https://howtotunepianos.com/wp-content/uploads/2020/05/f3a3n17f.mp3" ];var speed = [ "3.9", "4.0", "4.0", "4.1", "4.2", "4.3", "4.4", "4.5", "4.6", "4.7", "4.8", "4.9", "5.0", "5.1", "5.1", "5.2", "5.3"];var diff = [ "16% wide. You should be able to hear that the M10 is faster than the M3.nTry again", "14% wide. You should be able to hear that the M10 is faster than the M3.nTry again", "12% wide. You should be able to hear that the M10 is faster than the M3.nTry again", "10% wide. You should be able to hear that the M10 is faster than the M3.nTry again", "8% wide. You should be able to hear that the M10 is faster than the M3.nTry again", "6% wide. You should be able to hear that the M10 is faster than the M3.nTry again", "4% wide. The M10 is faster than the M3. You might be able to tell.nTry again", "2% wide. "Pure". The M10 is faster than the M3 but you probably can't tell. Good job!", "Pure. The M3 is equal to the M10. If you picked this, you got lucky. We can't consistently tune to this level.", "2% narrow. "Pure". The M10 is slower than the M3 but you probably can't tell. Good job!", "3% narrow. "Pure". The M10 is slower than the M3 but you probably can't tell. Good job!", "5% narrow. The M10 is slower than the M3. You might be able to tell.nTry again", "8% narrow. You should be able to hear that the M10 is slower than the M3.nTry again", "10% narrow. You should be able to hear that the M10 is slower than the M3.nTry again", "11% narrow. You should be able to hear that the M10 is slower than the M3.nTry again", "13% narrow. You should be able to hear that the M10 is slower than the M3.nTry again", "15% narrow. You should be able to hear that the M10 is slower than the M3.nTry again"]; var randomA3 = Math.random(); if (randomA3<0.15) { iii=0; }else if (randomA3 >= 0.15 && randomA3 < 0.25) { iii=1; }else if (randomA3 >= 0.25 && randomA3 < 0.35) { iii=2; }else if (randomA3 >= 0.35 && randomA3 < 0.5) { iii=3; }else if (randomA3 >= 0.5 && randomA3 < 0.6) { iii=13; }else if (randomA3 >= 0.6 && randomA3 < 0.7) { iii=14; }else if (randomA3 >= 0.7 && randomA3 < 0.85) { iii=15; }else{ iii=16; } function playA3A4() { track1 = new Audio(a3a4[iii]); track1.play(); } function playF3A3() { track1 = new Audio(f3a3[iii]); track1.play(); document.getElementById("M3speed").innerHTML = "M3 = " + speed[iii] + " bps"; } function playF3A3f() { track1 = new Audio(f3a3f[iii]); track1.play(); document.getElementById("M3speed").innerHTML = "M3 = " + speed[iii] + " bps"; } function playF3A4() { track1 = new Audio(f3a4); track1.play(); } function playF3A4f() { track1 = new Audio(f3a4f); track1.play(); } function raiseA3() { var coin = Math.random(); if (coin<0.5) { iii=iii+1; } if (iii>16) {iii=16} track1 = new Audio(f3a3[iii]); track1.play(); } function lowerA3() { var coin = Math.random(); if (coin<0.5) { iii=iii-1; } if (iii<0) {iii=0} track1 = new Audio(f3a3[iii]); track1.play(); } function check() { document.getElementById("results").innerHTML = diff[iii]; } [/tcb-script][tcb-script]//Old code I guess//faster = [447.5, 447, 446.5, 446, 445.75, 445.63, 445.5, 445.4, 445.3, 445.25, 445.2, 445.15, 445.1, 445.05];//slower = [443.33,443.57,443.85,444.17,444.35,444.44,444.55,444.63,444.72,444.76,444.81,444.85,444.9,444.95];function instructions() { alert("BEAT SPEED DIFFERENCE SENSITIVITY TEST INSTRUCTIONSnnConfirm the setup values and then press START.nnThe setup values should be 10% and 9 bps.nIf they are listed as NaN, then your browser does not support the javascript used to make this app.nnYou will hear a beat speed of 9 beats per second. (9 bps)nThen you will hear another beat speed that is randomly faster or slower than 9 bps.nSimply click whether you hear the 2nd beat speed as faster or slower than the 1st beat speed.nnThen there will be a pause of 1 second, and then you will hear the 9 bps beat speed again, followed by a randomly generated faster or slower beat speed.nnIf you are not sure of a beat speed, you can click NEW BEAT SPEED to hear another randomly generated beat speed.");}function scoring() { alert("BEAT SPEED DIFFERENCE SENSITIVITY TEST SCORINGnnYou will start out hearing the 2nd beat speed as being 10% faster or slower than the 1st beat speed of 9 bps.nIf you get three in a row correct, the beat speed difference will get smaller.nIf you get one wrong, your beat speed difference will increase.nnGet three more right at that new larger beat speed difference to be scored at that difference.nnExample:n10% difference. 3 right. Drop to 6%n6% difference. 3 right. Drop to 5%n5% difference. 3 right. Drop to 4%n4% difference. 3 right. Drop to 3%n3% difference. 3 right. Drop to 2%n2% difference. 1 wrong. Back to 3%n3% difference. 3 right. You get scored at 3%.nnYou need to get equal to or below 3% to get to the next lesson."); }function setup() {// Old code from when was collecting data // levelString = document.startingValues.bsdStart.value;// level = Number(levelString);// refBpsString = document.startingValues.bpsStart.value;// refBps = Number(refBpsString);//Setuplevel = 4;refBps = 9; faster = [ 440+((bsd[0]+1)*refBps), 440+((bsd[1]+1)*refBps), 440+((bsd[2]+1)*refBps), 440+((bsd[3]+1)*refBps), 440+((bsd[4]+1)*refBps), 440+((bsd[5]+1)*refBps), 440+((bsd[6]+1)*refBps), 440+((bsd[7]+1)*refBps), 440+((bsd[8]+1)*refBps), 440+((bsd[9]+1)*refBps), 440+((bsd[10]+1)*refBps), 440+((bsd[11]+1)*refBps), 440+((bsd[12]+1)*refBps), 440+((bsd[13]+1)*refBps), 440+((bsd[14]+1)*refBps), 440+((bsd[15]+1)*refBps)];slower = [ 440 + refBps/(bsd[0]+1), 440 + refBps/(bsd[1]+1), 440 + refBps/(bsd[2]+1), 440 + refBps/(bsd[3]+1), 440 + refBps/(bsd[4]+1), 440 + refBps/(bsd[5]+1), 440 + refBps/(bsd[6]+1), 440 + refBps/(bsd[7]+1), 440 + refBps/(bsd[8]+1), 440 + refBps/(bsd[9]+1), 440 + refBps/(bsd[10]+1), 440 + refBps/(bsd[11]+1), 440 + refBps/(bsd[12]+1), 440 + refBps/(bsd[13]+1), 440 + refBps/(bsd[14]+1), 440 + refBps/(bsd[15]+1) ];alert("Test has been set up with the following parameters:nStarting beat speed difference: " + bsd[level]*100 + "%nReference beat speed: " + refBps + "bpsnClick OK to continue.");}//END OF SETUP FUNCTION//INITIALIZING VARIABLESbsd = [0.5, 0.4, 0.3, 0.2, 0.1, 0.06, 0.05, 0.04, 0.03, 0.02, 0.01, 0.005, 0.0025];passed = [0,0,0,0,0,0,0,0,0,0,0,0,0,0];conCorrect = 0;level = 0;choice = "empty";document.getElementById("bsd").innerHTML = "Testing Beat Speed Difference Sensitivity (BSDS) of: <stromng>10%</strong>";document.getElementById("curConCorrect").innerHTML = "Consecutive correct answers at this BSDS: None yet"; document.getElementById("Choice").innerHTML = "Your Choice: None answered yet"; // Initialize the Audio Contextvar context = new AudioContext(); // Create audio container with webkit prefix// Declare variables in the global scope so they can be disconnectedvar a440, a445, constRef, moveablePitch;var a440Gain, a445Gain, constRefGain, moveablePitchain;//DONE INITIALIZING VARIABLES//FUNCTIONS//Return a pitch that gives the required bsd randomly faster or slowerfunction getPitch() { var coin = Math.random(); if (coin > 0.5) { return faster[level]; } else { return slower[level]; } }//Do if user chooses fasterfunction fasterChoice() { constRef.stop(0); // Stop oscillator after 0 seconds constRef.disconnect(); // Disconnect oscillator so it can be picked up by browser's garbage collector moveablePitch.stop(0); // Stop oscillator after 0 seconds moveablePitch.disconnect(); // Disconnect oscillator so it can be picked up by browser's garbage collector choice = "Faster"; if (difference > refBps) { //Correct? document.getElementById("Choice").innerHTML = "Your Choice: <strong>Correct</strong>"; conCorrect = conCorrect + 1; document.getElementById("curConCorrect").innerHTML = "Consecutive correct answers at this BSDS: <strong>" + conCorrect + "</strong>"; if (conCorrect > 2) { //if third correct if (passed[level] === 1) { //2nd time completing this level alert("Your Beat Speed Sensitivity is " + bsd[level]*100 + "%"); if (bsd[level]*100 <= 3) { //Next Lesson alert("Congratulations.nYou can now go to the next lesson.nIntroduction to Tuning A4"); } else { //Try again alert("Almost.nTry to get equal to or below 3%."); window.location.reload(); } } else { //1st time completing this level passed[level] = 1; level = level + 1; if (level > 15) { alert("Your Beat Speed Sensitivity is " + bsd[level]*100 + "%"); if (bsd[level]*100 <= 3) { //Next Lesson alert("Congratulations.nYou can now got to the next lesson.nIntroduction to Tuning A4"); } else { //Try again alert("Almost.nTry to get equal to or below 3%."); window.location.reload(); } } else { //Not at highest level yet. Setup for next level. document.getElementById("bsd").innerHTML = "Testing Beat Speed Difference Sensitivity (BSDS) of: <strong>" + bsd[level]*100 + "</strong>%"; conCorrect = 0; document.getElementById("curConCorrect").innerHTML = "Consecutive correct answers at this BSDS: " + " "; } } } else { //Not third correct document.getElementById("curConCorrect").innerHTML = "Consecutive correct answers at this BSDS: <strong>" + conCorrect + "</strong>"; } } else { //if wrong document.getElementById("Choice").innerHTML = "Your choice: <strong>Wrong</strong>"; conCorrect = 0 level = level - 1; if (level < 0) { //failed first level alert("Your Beat Speed Sensitivity is " + bsd[level]*100 + "%"); if (bsd[level]*100 <= 3) { //Next Lesson alert("Congratulations.nNow try the next lesson.nIntroduction to Tuning A4"); } else { //Try again alert("Almost.nTry to get equal to or below 3%."); window.location.reload(); } } }choice = "empty"; playInterval() var clearChoice = setTimeout(function(){ document.getElementById("Choice").innerHTML = "Your Choice: " + ""; },3000);}function stopTest() { window.location.reload(); } //Do if user chooses slowerfunction slowerChoice() { constRef.stop(0); // Stop oscillator after 0 seconds constRef.disconnect(); // Disconnect oscillator so it can be picked up by browserÃ¯Â¿Â½s garbage collector moveablePitch.stop(0); // Stop oscillator after 0 seconds moveablePitch.disconnect(); // Disconnect oscillator so it can be picked up by browserÃ¯Â¿Â½s garbage collector choice = "Slower"; if (difference < refBps) { //Correct? document.getElementById("Choice").innerHTML = "Your Choice: <strong>Correct</strong>"; conCorrect = conCorrect + 1; document.getElementById("curConCorrect").innerHTML = "Your Choice: <strong>" + conCorrect +"</strong>"; if (conCorrect > 2) { //if third correct if (passed[level] === 1) { //2nd time completing this level alert("Your Beat Speed Sensitivity is " + bsd[level]*100 + "%"); if (bsd[level]*100 <= 3) { //Next Lesson alert("Congratulations.nYou are now being redirected to the next lesson.nIntroduction to Tuning A4");alert("It may take a few minutes") location.assign("https://howtotunepianos.com/ear-training-for-piano-tuners-tuning-a4-lesson-1/", "_self"); } else { //Try again alert("Almost.nTry to get equal to or below 3%."); window.location.reload(); } } else { //1st time completing this level passed[level] = 1; level = level + 1; if (level > 15) { //highest level alert("Your Beat Speed Sensitivity is <strong>" + bsd[level]*100 + "</strong>%"); if (bsd[level]*100 <= 3) { //Next Lesson alert("Congratulations.nYou are now being redirected to the next lesson.nIntroduction to Tuning A4");alert("It may take a few minutes") location.assign("https://howtotunepianos.com/ear-training-for-piano-tuners-tuning-a4-lesson-1/", "_self"); } else { //Try again alert("Almost.nTry to get equal to or below 3%."); window.location.reload(); } } else { //Not at highest level yet. Setup for next level. document.getElementById("bsd").innerHTML = "Testing Beat Speed Difference Sensitivity (BSDS) of: <strong>" + bsd[level]*100 + "</strong>%"; conCorrect = 0; document.getElementById("curConCorrect").innerHTML = "Consecutive correct answers at this BSDS: " + " "; } } } else { //Not third correct document.getElementById("curConCorrect").innerHTML = "Consecutive correct answers at this BSDS: <strong>" + conCorrect + "</strong>"; } } else { //if wrong document.getElementById("Choice").innerHTML = "Your Choice: <strong>Wrong</strong>"; conCorrect = 0 level = level - 1;if (level < 0) { //failed first level alert("Your Beat Speed Sensitivity is " + bsd[level]*100 + "%"); if (bsd[level]*100 <= 3) { //Next Lesson alert("Congratulations.nYou are now being redirected to the next lesson.nIntroduction to Tuning A4");alert("It may take a few minutes") location.assign("https://howtotunepianos.com/ear-training-for-piano-tuners-tuning-a4-lesson-1/", "_self"); } else { //Try again alert("Almost.nTry to get equal to or below 3%."); window.location.reload(); } } }choice = "empty"; playInterval()var clearChoice = setTimeout(function(){ document.getElementById("Choice").innerHTML = "Your Choice: " + ""; },3000);} function playInterval(){ pitch = getPitch(); document.getElementById("bsd").innerHTML = "Testing Beat Speed Difference Sensitivity (BSDS) of: <strong>" + bsd[level]*100 + "%</strong>"; difference = pitch - 440; // Play a440 immediately for 2s var playA440 = setTimeout(function(){a440 = context.createOscillator(); // Create sound sourcea440.type = "sine"; // Sine wavea440.frequency.value = 440; // Frequency in hertz (passed from input button)a440.start(0); // Play oscillator instantlya440Gain = context.createGain(); // Create gain nodea440Gain.gain.value = 1; // Set gain to full volumea440.connect(a440Gain); // Connect oscillator to gaina440Gain.connect(context.destination); // Connect gain to output },1500); var stopA440 = setTimeout(function(){ a440Gain.gain.value = 0; // Set gain to zero a440.stop(0); // Stop oscillator after 0 seconds a440.disconnect(); // Disconnect oscillator so it can be picked up by browserÃ¯Â¿Â½s garbage collector },3000); // Play a445 immediately for 2s var playA445 = setTimeout(function(){a445 = context.createOscillator(); // Create sound sourcea445.type = "sine"; // Sine wavea445.frequency.value = 440 + refBps; // Frequency in hertz (passed from input button)a445.start(0); // Play oscillator instantlya445Gain = context.createGain(); // Create gain nodea445Gain.gain.value = 1; // Set gain to full volumea445.connect(a445Gain); // Connect oscillator to gaina445Gain.connect(context.destination); // Connect gain to output },1500); var stopA445 = setTimeout(function(){ a445Gain.gain.value = 0; // Set gain to zero a445.stop(0); // Stop oscillator after 0 seconds a445.disconnect(); // Disconnect oscillator so it can be picked up by browserÃ¯Â¿Â½s garbage collector },3000); // Play constRef after 2s for 2s var playConstRef = setTimeout(function(){constRef = context.createOscillator(); // Create sound sourceconstRef.type = "sine"; // Sine wave constRef.frequency.value = 440; // Frequency in hertz (passed from input button)constRef.start(0); // Play oscillator instantlyconstRefGain = context.createGain(); // Create gain nodeconstRefGain.gain.value = 1; // Set gain to full volumeconstRef.connect(constRefGain); // Connect oscillator to gainconstRefGain.connect(context.destination); // Connect gain to output },3500); var stopConstRef = setTimeout(function(){ constRef.stop(0); // Stop oscillator after 0 seconds constRef.disconnect(); // Disconnect oscillator so it can be picked up by browserÃ¯Â¿Â½s garbage collector },6800); // Play moveablePitch after 2s for 2s var playMoveablePitch = setTimeout(function(){moveablePitch = context.createOscillator(); // Create sound sourcemoveablePitch.type = "sine"; // Sine wave moveablePitch.frequency.value = pitch; // Frequency in hertz (passed from input button)moveablePitch.start(0); // Play oscillator instantlymoveablePitchGain = context.createGain(); // Create gain nodemoveablePitchGain.gain.value = 1; // Set gain to full volumemoveablePitch.connect(moveablePitchGain); // Connect oscillator to gainmoveablePitchGain.connect(context.destination); // Connect gain to output },3500); var stopA445 = setTimeout(function(){ moveablePitch.stop(0); // Stop oscillator after 0 seconds moveablePitch.disconnect(); // Disconnect oscillator so it can be picked up by browser's garbage collector },6800);}[/tcb-script]

Tuning a Pure 4:2 – Level 2

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