diff options
Diffstat (limited to 'sensfreq')
| -rw-r--r-- | sensfreq/main.js | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/sensfreq/main.js b/sensfreq/main.js index 6dc431e..a50ae95 100644 --- a/sensfreq/main.js +++ b/sensfreq/main.js @@ -1,6 +1,7 @@ const audioCtx = new (window.AudioContext || window.webkitAudioContext)(); e = s => document.getElementById(s); +n2n = n => ["C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"][n]; let ans = false; let nq = 0; @@ -9,23 +10,24 @@ let nc = 0; function init() { e("gench").disabled = false; - e("response").style.display="none"; + e("response").style.display = "none"; + e("prompt").innerHTML = " "; reset_stats(); loadTheme(); } function play_notes(freq, t, arpt) { - const stop_notes=function(g, o) + const stop_notes = function(g, o) { o.stop(); g.disconnect(audioCtx.destination); o.disconnect(g); } - const play_note=function(f) + const play_note = function(f) { const gn = audioCtx.createGain(); - gn.gain.setValueAtTime(.5/freq.length, audioCtx.currentTime); + gn.gain.setValueAtTime(.5 / freq.length, audioCtx.currentTime); gn.gain.linearRampToValueAtTime(0, audioCtx.currentTime + t / 1000.); gn.connect(audioCtx.destination); const osc = audioCtx.createOscillator(); @@ -39,7 +41,7 @@ function play_notes(freq, t, arpt) freq.forEach(function(f){setTimeout(play_note.bind(null, f), arpt * (i++));}); } -get_freq = n => 440 * Math.pow(Math.pow(2, 1./12), n-69) +get_freq = n => 440 * Math.pow(Math.pow(2, 1. / 12), n - 69) function generate_challenge() { @@ -71,20 +73,22 @@ function generate_challenge() while (f.length < nnotes) { let n = Math.floor(Math.random() * (maxrange - minrange + 1)) + minrange; - if (l.indexOf(n)!=-1) + if (l.indexOf(n) != -1) continue; ans |= ((n % 12) == Number(e("note").value)); f.push(get_freq(n)); } - f.sort((a,b)=>a-b); + f.sort((a,b)=>a - b); play_notes(f, 1000, e("arp").checked ? 50 : 0); e("gench").disabled = true; - e("response").style.display=""; + e("response").style.display = ""; + e("prompt").innerHTML = nnotes == 1 ? `Was the note you just heard ${n2n(Number(e("note").value))}?` + : `Did the chord you just heard contain the note ${n2n(Number(e("note").value))}?`; } function update_stats() { - e("stats").innerHTML=`You got ${nc} of the ${nq} challenges correct.` + e("stats").innerHTML = `You got ${nc} of the ${nq} challenges correct.`; } function reset_stats() |