diff --git a/sound_algo/palette/note.scd b/sound_algo/palette/note.scd
new file mode 100644
index 0000000..c7f6ac4
--- /dev/null
+++ b/sound_algo/palette/note.scd
@@ -0,0 +1,40 @@
+// =====================================================================
+//  palette/note.scd  --  Source de verite : gammes + degree->note
+//
+//  Une seule definition de la resolution degree->note MIDI, consommee par
+//  les resolveurs (~ccNote concert, ~lpNote launchpad, ~fpResolve air-piano).
+//  Independant : aucun pre-requis, chargeable dans LES DEUX chemins de boot
+//  (LIVE et data-only) AVANT tout consommateur.
+//
+//  NB : les arrays ~scaleXxx de palette/scales.scd (melodies LIVE, 8 notes
+//  sur-mesure) sont distincts et NON touches ici.
+//  Un seul bloc top-level (compatible .load).
+// =====================================================================
+(
+// Gammes en OFFSETS de demi-tons depuis la fondamentale.
+~scales = IdentityDictionary[
+    \minor     -> [0, 2, 3, 5, 7, 8, 10],
+    \dorian    -> [0, 2, 3, 5, 7, 9, 10],
+    \phrygian  -> [0, 1, 3, 5, 7, 8, 10],
+    \penta     -> [0, 2, 4, 7, 9],          // pentatonique majeure (concert)
+    \minorPent -> [0, 3, 5, 7, 10],
+    \blues     -> [0, 3, 5, 6, 7, 10],
+    \japanese  -> [0, 2, 5, 7, 9],
+    \hijaz     -> [0, 1, 4, 5, 7, 8, 10],
+    \hirajoshi -> [0, 2, 3, 7, 8]
+];
+
+// degree -> note MIDI, avec report d'octave (mod plancher gere les degres
+// negatifs : -1 descend). root en MIDI, octave en octaves entieres.
+~noteFor = { |degree, scaleName = \minor, root = 60, octave = 0|
+    var sc = ~scales[scaleName] ? ~scales[\minor];
+    var d  = degree.asInteger;
+    (root + ((octave + (d div: sc.size)) * 12) + sc[d % sc.size]).asInteger;
+};
+
+~freqFor = { |degree, scaleName = \minor, root = 60, octave = 0|
+    ~noteFor.(degree, scaleName, root, octave).midicps;
+};
+
+"[OK] palette/note.scd : ~scales, ~noteFor, ~freqFor".postln;
+)
diff --git a/sound_algo/tests/test_note.scd b/sound_algo/tests/test_note.scd
new file mode 100644
index 0000000..af55f5b
--- /dev/null
+++ b/sound_algo/tests/test_note.scd
@@ -0,0 +1,23 @@
+// Headless unit test for palette/note.scd.
+// Run: sclang sound_algo/tests/test_note.scd
+(
+var ok = true, base;
+base = thisProcess.nowExecutingPath.dirname.dirname ++ "/";
+(base ++ "palette/note.scd").load;
+
+// root note of minor pentatonic at root 60
+if(~noteFor.(0, \minorPent, 60, 0) != 60) { ok = false; "FAIL: root".postln };
+// degree 5 wraps one octave on a 5-note scale -> 72
+if(~noteFor.(5, \minorPent, 60, 0) != 72) { ok = false; "FAIL: wrap".postln };
+// minor degree 2 = +3 semitones -> 63
+if(~noteFor.(2, \minor, 60, 0) != 63) { ok = false; "FAIL: minor".postln };
+// concert parity: minor root 45 degree 2 -> 48 (old ~ccNote value)
+if(~noteFor.(2, \minor, 45, 0) != 48) { ok = false; "FAIL: cc".postln };
+// negative degree descends with floored mod: -1 on minor -> 58 (Bb, one step below C)
+if(~noteFor.(-1, \minor, 60, 0) != 58) { ok = false; "FAIL: neg".postln };
+// freq matches midicps
+if(~freqFor.(0, \minorPent, 60, 0) != 60.midicps) { ok = false; "FAIL: freq".postln };
+
+if(ok) { "PASS test_note".postln } { "TESTS FAILED".postln };
+0.exit;
+)