Add text shorthand, MusicXML, and MIDI import to editor
The import panel now has 4 tabs: - JSON: existing JSON import (unchanged) - Text/Shorthand: type notes like "C4 quarter, D4 eighth, E4 half" or "C4 q D4 e E4 h" — supports all duration names, rests, auto lane assignment by pitch range - MusicXML: import .xml/.musicxml files from MuseScore, Finale, Sibelius, flat.io etc. Parses pitch, duration, tempo, chords, rests, and mid-stream tempo changes - MIDI: import .mid files with a minimal parser that handles format 0/1, tempo events, note on/off pairing, and tick-to-second conversion All import modes support an "Append" checkbox to add to existing notes. Lanes are auto-assigned by pitch range (high=Red, low=Kick). https://claude.ai/code/session_01TLvDyKzUQekd9hzFuEJ5YX
This commit is contained in:
Claude
+383
-15
@@ -256,14 +256,47 @@ canvas{display:block;}
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<textarea id="ed-code" style="width:100%;height:180px;min-height:60px;background:#111;color:#8f8;font-family:monospace;font-size:11px;border:1px solid #333;padding:4px;resize:vertical;" spellcheck="false"></textarea>
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</div>
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<div id="ed-import-panel" style="display:none;padding:8px 12px;background:#0a0a14;border-bottom:1px solid #333;">
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<div style="display:flex;gap:8px;align-items:center;flex-wrap:wrap;">
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<div style="display:flex;gap:4px;margin-bottom:6px;">
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<button class="smbtn" onclick="edShowImportTab('json')" id="ed-imp-tab-json" style="background:#3182ce;font-size:10px;">JSON</button>
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<button class="smbtn" onclick="edShowImportTab('text')" id="ed-imp-tab-text" style="font-size:10px;">Text/Shorthand</button>
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<button class="smbtn" onclick="edShowImportTab('musicxml')" id="ed-imp-tab-musicxml" style="font-size:10px;">MusicXML</button>
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<button class="smbtn" onclick="edShowImportTab('midi')" id="ed-imp-tab-midi" style="font-size:10px;">MIDI</button>
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</div>
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<div id="ed-imp-json" style="display:flex;gap:8px;align-items:center;flex-wrap:wrap;">
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<span style="color:#888;font-size:11px;">Paste JSON array of {t,l} notes or drag a .json file:</span>
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<textarea id="ed-import-text" style="width:100%;height:60px;background:#111;color:#ff8;font-family:monospace;font-size:11px;border:1px solid #333;padding:4px;resize:vertical;" placeholder='[{"t":0,"l":0},{"t":0.5,"l":1}]'></textarea>
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<button class="smbtn" onclick="edDoImport()" style="background:#3182ce;">Import</button>
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<button class="smbtn" onclick="edImportMIDI()">MIDI File</button>
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<input type="file" id="ed-midi-file" accept=".mid,.midi,.json" style="display:none;" onchange="edHandleFile(event)">
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<span id="ed-import-status" style="color:#888;font-size:11px;"></span>
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<button class="smbtn" onclick="edDoImport()" style="background:#3182ce;">Import JSON</button>
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<button class="smbtn" onclick="document.getElementById('ed-json-file').click()">Load .json File</button>
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<input type="file" id="ed-json-file" accept=".json" style="display:none;" onchange="edHandleFile(event)">
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</div>
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<div id="ed-imp-text" style="display:none;">
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<span style="color:#888;font-size:11px;">Type notes as: <b style="color:#ff8;">C4 quarter, D4 eighth, E4 half</b> — or: <b style="color:#ff8;">C4 q D4 e E4 h</b> — or one per line. Lane auto-assigned by pitch.</span>
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<textarea id="ed-shorthand-text" style="width:100%;height:80px;background:#111;color:#ff8;font-family:monospace;font-size:11px;border:1px solid #333;padding:4px;resize:vertical;margin-top:4px;" placeholder="C4 quarter, D4 eighth, E4 half, F4 quarter or: C4 q D4 e E4 h F4 q or one per line: C4 quarter D4 eighth"></textarea>
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<div style="display:flex;gap:8px;align-items:center;margin-top:4px;">
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<button class="smbtn" onclick="edDoShorthandImport()" style="background:#3182ce;">Import Notes</button>
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<label style="color:#888;font-size:11px;"><input type="checkbox" id="ed-short-append"> Append (don't replace)</label>
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</div>
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<div style="color:#555;font-size:10px;margin-top:4px;">
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Durations: <b>w</b>hole, <b>dh</b> dotted-half, <b>h</b>alf, <b>dq</b> dotted-quarter, <b>q</b>uarter, <b>de</b> dotted-eighth, <b>e</b>ighth, <b>s</b>ixteenth, <b>r</b> rest (skip) — default: quarter
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</div>
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</div>
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<div id="ed-imp-musicxml" style="display:none;">
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<span style="color:#888;font-size:11px;">Import a MusicXML file (.xml or .musicxml) — exports from MuseScore, Finale, Sibelius, flat.io, etc.</span>
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<div style="display:flex;gap:8px;align-items:center;margin-top:6px;">
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<button class="smbtn" onclick="document.getElementById('ed-musicxml-file').click()" style="background:#3182ce;">Choose MusicXML File</button>
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<input type="file" id="ed-musicxml-file" accept=".xml,.musicxml,.mxl" style="display:none;" onchange="edHandleMusicXML(event)">
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<label style="color:#888;font-size:11px;"><input type="checkbox" id="ed-mxml-append"> Append</label>
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</div>
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</div>
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<div id="ed-imp-midi" style="display:none;">
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<span style="color:#888;font-size:11px;">Import a MIDI file (.mid, .midi) — basic single-track import.</span>
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<div style="display:flex;gap:8px;align-items:center;margin-top:6px;">
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<button class="smbtn" onclick="document.getElementById('ed-midi-file').click()" style="background:#3182ce;">Choose MIDI File</button>
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<input type="file" id="ed-midi-file" accept=".mid,.midi" style="display:none;" onchange="edHandleMIDI(event)">
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<label style="color:#888;font-size:11px;"><input type="checkbox" id="ed-midi-append"> Append</label>
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</div>
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</div>
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<div><span id="ed-import-status" style="color:#888;font-size:11px;"></span></div>
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</div>
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<canvas id="ed-canvas" style="display:block;width:100%;flex:1;min-height:200px;cursor:crosshair;align-self:stretch;"></canvas>
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</div>
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@@ -6057,22 +6090,357 @@ function edDoImport(){
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document.getElementById("ed-import-status").textContent="JSON parse error: "+e.message;
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}
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}
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function edImportMIDI(){document.getElementById("ed-midi-file").click();}
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function edHandleFile(e){
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var file=e.target.files[0];if(!file)return;
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var reader=new FileReader();
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if(file.name.endsWith(".json")){
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reader.onload=function(ev){
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document.getElementById("ed-import-text").value=ev.target.result;
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edDoImport();
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};
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reader.readAsText(file);
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}else{
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document.getElementById("ed-import-status").textContent="MIDI parsing not yet supported — convert to JSON first (use AI or online converter)";
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}
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reader.onload=function(ev){
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document.getElementById("ed-import-text").value=ev.target.result;
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edDoImport();
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};
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reader.readAsText(file);
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e.target.value="";
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}
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// Tab switching for import panel
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function edShowImportTab(tab){
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["json","text","musicxml","midi"].forEach(function(t){
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document.getElementById("ed-imp-"+t).style.display=t===tab?"block":"none";
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var btn=document.getElementById("ed-imp-tab-"+t);
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btn.style.background=t===tab?"#3182ce":"";
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});
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document.getElementById("ed-import-status").textContent="";
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}
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// --- TEXT/SHORTHAND IMPORT ---
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// Parses: "C4 quarter, D4 eighth, E4 half" or "C4 q D4 e E4 h" or one-per-line
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function edDoShorthandImport(){
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var text=document.getElementById("ed-shorthand-text").value.trim();
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if(!text){document.getElementById("ed-import-status").textContent="Type some notes first";return;}
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var status=document.getElementById("ed-import-status");
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var durMap={
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"w":"whole","whole":"whole",
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"dh":"dotted-half","dotted-half":"dotted-half","d.h":"dotted-half",
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"h":"half","half":"half",
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"dq":"dotted-quarter","dotted-quarter":"dotted-quarter","d.q":"dotted-quarter",
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"q":"quarter","quarter":"quarter",
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"de":"dotted-eighth","dotted-eighth":"dotted-eighth","d.e":"dotted-eighth",
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"e":"eighth","eighth":"eighth",
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"s":"sixteenth","sixteenth":"sixteenth",
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"ts":"32nd","32nd":"32nd"
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};
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// Normalize: replace commas and newlines with spaces, collapse whitespace
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var tokens=text.replace(/,/g," ").replace(/\n/g," ").replace(/\s+/g," ").trim().split(" ");
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var notes=[];
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var t=0;
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var q=60/edBpm; // quarter note duration in seconds
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var i=0;
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var errors=[];
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while(i<tokens.length){
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var tok=tokens[i];
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// Check if it's a note name (letter + optional accidental + octave)
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if(/^[A-Ga-g][#b♯♭]?\d$/.test(tok)){
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var durName="quarter"; // default
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var durSec=q;
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// Check if next token is a duration
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if(i+1<tokens.length){
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var nextLow=tokens[i+1].toLowerCase();
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if(durMap[nextLow]){
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durName=durMap[nextLow];
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durSec=edDurNameToSec(durName);
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i++; // consume duration token
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}
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}
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var freq=edNoteToFreq(tok);
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if(freq>0){
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// Auto-assign lane based on pitch range
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var lane=edPitchToLane(freq);
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notes.push({t:parseFloat(t.toFixed(4)),l:lane,f:freq,d:parseFloat(durSec.toFixed(4))});
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t+=durSec;
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}else{
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errors.push("Bad note: "+tok);
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}
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i++;
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}else if(tok.toLowerCase()==="r"||tok.toLowerCase()==="rest"){
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// Rest — advance time without adding a note
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var restDur=q;
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if(i+1<tokens.length){
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var nextLow2=tokens[i+1].toLowerCase();
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if(durMap[nextLow2]){restDur=edDurNameToSec(durMap[nextLow2]);i++;}
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}
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t+=restDur;
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i++;
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}else if(durMap[tok.toLowerCase()]){
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// Bare duration without preceding note — skip
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i++;
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}else{
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errors.push("Unknown: "+tok);
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i++;
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}
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}
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if(notes.length===0){status.textContent="No valid notes found. "+errors.join(", ");return;}
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var append=document.getElementById("ed-short-append").checked;
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if(append){
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var offset=0;
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edMelody.forEach(function(m){var end=m.t+(m.d||0);if(end>offset)offset=end;if(m.t>offset)offset=m.t;});
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notes.forEach(function(n){n.t=parseFloat((n.t+offset).toFixed(4));});
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edMelody=edMelody.concat(notes);
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}else{
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edMelody=notes;
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}
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edMelody.sort(function(a,b){return a.t-b.t;});
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edSelected=-1;edDraw();edUpdateCode();
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var msg="Imported "+notes.length+" notes from shorthand!";
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if(errors.length>0)msg+=" ("+errors.length+" warnings: "+errors.slice(0,3).join(", ")+")";
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status.textContent=msg;
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}
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// Auto-assign lane based on pitch frequency
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function edPitchToLane(freq){
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// Map pitch ranges to lanes 0-4
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// Lane 0=Red (high), 1=Yellow, 2=Blue, 3=Green (low), 4=Kick (very low)
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if(freq>=500)return 0; // C5 and above → Red
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if(freq>=370)return 1; // F#4 to B4 → Yellow
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if(freq>=280)return 2; // C#4 to F4 → Blue
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if(freq>=180)return 3; // F#3 to C4 → Green
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return 4; // below F#3 → Kick
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}
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// --- MUSICXML IMPORT ---
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function edHandleMusicXML(e){
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var file=e.target.files[0];if(!file)return;
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var status=document.getElementById("ed-import-status");
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var reader=new FileReader();
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reader.onload=function(ev){
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try{
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var parser=new DOMParser();
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var xml=parser.parseFromString(ev.target.result,"text/xml");
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var parseErr=xml.querySelector("parsererror");
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if(parseErr){status.textContent="XML parse error — is this a valid MusicXML file?";return;}
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var notes=edParseMusicXML(xml);
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if(notes.length===0){status.textContent="No notes found in MusicXML";return;}
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var append=document.getElementById("ed-mxml-append").checked;
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if(append){
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var offset=0;
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edMelody.forEach(function(m){var end=m.t+(m.d||0);if(end>offset)offset=end;});
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notes.forEach(function(n){n.t=parseFloat((n.t+offset).toFixed(4));});
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edMelody=edMelody.concat(notes);
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}else{
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edMelody=notes;
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}
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edMelody.sort(function(a,b){return a.t-b.t;});
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edSelected=-1;edDraw();edUpdateCode();
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status.textContent="Imported "+notes.length+" notes from MusicXML!";
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}catch(err){
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status.textContent="MusicXML error: "+err.message;
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}
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};
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reader.readAsText(file);
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e.target.value="";
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}
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function edParseMusicXML(xml){
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var notes=[];
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var q=60/edBpm; // quarter note duration
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// Find divisions (ticks per quarter note)
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var divEl=xml.querySelector("attributes divisions");
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var divisions=divEl?parseInt(divEl.textContent):1;
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// Get BPM from tempo marking if present
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var tempoEl=xml.querySelector("sound[tempo]");
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if(tempoEl){
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var xmlBpm=parseFloat(tempoEl.getAttribute("tempo"));
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if(xmlBpm>0){edBpm=Math.round(xmlBpm);document.getElementById("ed-bpm").value=edBpm;q=60/edBpm;}
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}
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// Walk through all measures → notes
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var t=0; // current time in seconds
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var measures=xml.querySelectorAll("measure");
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for(var mi=0;mi<measures.length;mi++){
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var meas=measures[mi];
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// Check for mid-stream divisions change
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var divEl2=meas.querySelector("attributes divisions");
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if(divEl2)divisions=parseInt(divEl2.textContent)||divisions;
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// Check for tempo change
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var tempoEl2=meas.querySelector("direction sound[tempo]");
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if(!tempoEl2)tempoEl2=meas.querySelector("sound[tempo]");
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if(tempoEl2){
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var newBpm=parseFloat(tempoEl2.getAttribute("tempo"));
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if(newBpm>0){q=60/newBpm;}
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}
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var children=meas.children;
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for(var ci=0;ci<children.length;ci++){
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var el=children[ci];
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if(el.tagName==="forward"){
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var fdur=el.querySelector("duration");
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if(fdur)t+=(parseInt(fdur.textContent)/divisions)*q;
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continue;
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}
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if(el.tagName==="backup"){
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var bdur=el.querySelector("duration");
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if(bdur)t-=(parseInt(bdur.textContent)/divisions)*q;
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if(t<0)t=0;
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continue;
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}
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if(el.tagName!=="note")continue;
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var durEl=el.querySelector("duration");
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var durTicks=durEl?parseInt(durEl.textContent):divisions;
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var durSec=(durTicks/divisions)*q;
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// Rest — advance time but don't add a note
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if(el.querySelector("rest")){
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if(!el.querySelector("chord"))t+=durSec;
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continue;
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}
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// Chord notes don't advance time
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var isChord=!!el.querySelector("chord");
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// Get pitch
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var pitchEl=el.querySelector("pitch");
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if(!pitchEl){if(!isChord)t+=durSec;continue;}
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var step=pitchEl.querySelector("step");
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var octave=pitchEl.querySelector("octave");
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var alter=pitchEl.querySelector("alter");
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if(!step||!octave){if(!isChord)t+=durSec;continue;}
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var noteName=step.textContent;
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var alterVal=alter?parseInt(alter.textContent):0;
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if(alterVal===1)noteName+="#";
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else if(alterVal===-1)noteName+="b";
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else if(alterVal===2)noteName+="##";
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else if(alterVal===-2)noteName+="bb";
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noteName+=octave.textContent;
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var freq=edNoteToFreq(noteName);
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if(freq>0){
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var lane=edPitchToLane(freq);
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notes.push({t:parseFloat(t.toFixed(4)),l:lane,f:freq,d:parseFloat(durSec.toFixed(4))});
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}
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if(!isChord)t+=durSec;
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}
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}
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return notes;
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}
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// --- MIDI IMPORT ---
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function edHandleMIDI(e){
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var file=e.target.files[0];if(!file)return;
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var status=document.getElementById("ed-import-status");
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var reader=new FileReader();
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reader.onload=function(ev){
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try{
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var buf=new Uint8Array(ev.target.result);
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var notes=edParseMIDI(buf);
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if(notes.length===0){status.textContent="No notes found in MIDI file";return;}
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var append=document.getElementById("ed-midi-append").checked;
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if(append){
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var offset=0;
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edMelody.forEach(function(m){var end=m.t+(m.d||0);if(end>offset)offset=end;});
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notes.forEach(function(n){n.t=parseFloat((n.t+offset).toFixed(4));});
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edMelody=edMelody.concat(notes);
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}else{
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edMelody=notes;
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}
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edMelody.sort(function(a,b){return a.t-b.t;});
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edSelected=-1;edDraw();edUpdateCode();
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status.textContent="Imported "+notes.length+" notes from MIDI!";
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}catch(err){
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status.textContent="MIDI error: "+err.message;
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}
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};
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reader.readAsArrayBuffer(file);
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e.target.value="";
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}
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function edParseMIDI(buf){
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// Minimal MIDI parser — handles format 0 and 1 single/multi track
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var pos=0;
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function readU16(){return(buf[pos++]<<8)|buf[pos++];}
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function readU32(){return(buf[pos++]<<24)|(buf[pos++]<<16)|(buf[pos++]<<8)|buf[pos++];}
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function readVarLen(){
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var v=0;
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for(var i=0;i<4;i++){
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var b=buf[pos++];
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v=(v<<7)|(b&0x7F);
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if(!(b&0x80))break;
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}
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return v;
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}
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// Header: MThd
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if(buf[0]!==0x4D||buf[1]!==0x54||buf[2]!==0x68||buf[3]!==0x64)throw new Error("Not a MIDI file");
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pos=4;
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var hdrLen=readU32(); // should be 6
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var format=readU16();
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var nTracks=readU16();
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||||
var ticksPerBeat=readU16();
|
||||
pos=8+hdrLen; // skip to first track
|
||||
|
||||
var usPerBeat=500000; // default 120 BPM
|
||||
var allEvents=[];
|
||||
|
||||
for(var tr=0;tr<nTracks;tr++){
|
||||
// MTrk
|
||||
if(buf[pos]!==0x4D||buf[pos+1]!==0x54||buf[pos+2]!==0x72||buf[pos+3]!==0x6B){
|
||||
// Skip non-track chunks
|
||||
pos+=4;var cLen=readU32();pos+=cLen;continue;
|
||||
}
|
||||
pos+=4;
|
||||
var trkLen=readU32();
|
||||
var trkEnd=pos+trkLen;
|
||||
var tickTime=0;
|
||||
var running=0;
|
||||
while(pos<trkEnd){
|
||||
var delta=readVarLen();
|
||||
tickTime+=delta;
|
||||
var byte1=buf[pos];
|
||||
if(byte1>=0x80){running=byte1;pos++;}
|
||||
var cmd=running&0xF0;
|
||||
if(cmd===0x90){// Note on
|
||||
var note=buf[pos++];var vel=buf[pos++];
|
||||
allEvents.push({type:vel>0?"on":"off",tick:tickTime,note:note,vel:vel,track:tr});
|
||||
}else if(cmd===0x80){// Note off
|
||||
var note2=buf[pos++];pos++;// skip vel
|
||||
allEvents.push({type:"off",tick:tickTime,note:note2,track:tr});
|
||||
}else if(cmd===0xA0||cmd===0xB0||cmd===0xE0){pos+=2;}
|
||||
else if(cmd===0xC0||cmd===0xD0){pos+=1;}
|
||||
else if(byte1===0xFF){// Meta event
|
||||
var metaType=buf[pos++];
|
||||
var metaLen=readVarLen();
|
||||
if(metaType===0x51&&metaLen===3){// Tempo
|
||||
usPerBeat=(buf[pos]<<16)|(buf[pos+1]<<8)|buf[pos+2];
|
||||
}
|
||||
pos+=metaLen;
|
||||
}else if(byte1===0xF0||byte1===0xF7){// SysEx
|
||||
var sysLen=readVarLen();pos+=sysLen;
|
||||
}else{
|
||||
// Unknown — try to skip gracefully
|
||||
pos++;
|
||||
}
|
||||
}
|
||||
pos=trkEnd;
|
||||
}
|
||||
|
||||
// Set BPM from tempo
|
||||
var bpmFromMidi=Math.round(60000000/usPerBeat);
|
||||
if(bpmFromMidi>0){edBpm=bpmFromMidi;document.getElementById("ed-bpm").value=edBpm;}
|
||||
|
||||
// Convert tick events to notes with time/duration
|
||||
allEvents.sort(function(a,b){return a.tick-b.tick||(a.type==="off"?-1:1);});
|
||||
var secPerTick=usPerBeat/(ticksPerBeat*1000000);
|
||||
var openNotes={}; // key: noteNum → {tick, event}
|
||||
var notes=[];
|
||||
for(var i=0;i<allEvents.length;i++){
|
||||
var ev=allEvents[i];
|
||||
var timeSec=ev.tick*secPerTick;
|
||||
var key=ev.note;
|
||||
if(ev.type==="on"){
|
||||
openNotes[key]={tick:ev.tick,time:timeSec};
|
||||
}else if(ev.type==="off"&&openNotes[key]){
|
||||
var start=openNotes[key];
|
||||
var dur=timeSec-start.time;
|
||||
if(dur<0.01)dur=0.05;
|
||||
var freq=parseFloat((440*Math.pow(2,(key-69)/12)).toFixed(2));
|
||||
var lane=edPitchToLane(freq);
|
||||
notes.push({t:parseFloat(start.time.toFixed(4)),l:lane,f:freq,d:parseFloat(dur.toFixed(4))});
|
||||
delete openNotes[key];
|
||||
}
|
||||
}
|
||||
return notes;
|
||||
}
|
||||
|
||||
// Download all edits as a JSON file (for transferring between machines)
|
||||
function edDownloadAllEdits(){
|
||||
var all=edGetAllSaved();
|
||||
|
||||
Reference in New Issue
Block a user