Feat: polyphony + iterator reset

docs/oddities.md

@@ -193,21 +193,42 @@ You can also use quotations if you need to execute code:
 
 When the selected value is a quotation, it gets executed. When it is a plain value, it gets pushed onto the stack.
 
-Three cycling words exist:
+Two cycling words exist:
 
 - `cycle` - selects based on `runs` (how many times this step has played)
 - `pcycle` - selects based on `iter` (how many times the pattern has looped)
-- `tcycle` - creates a cycle list that resolves at emit time
 
 The difference between `cycle` and `pcycle` matters when patterns have different lengths. `cycle` counts per-step, `pcycle` counts per-pattern.
 
-`tcycle` is special. It does not select immediately. Instead it creates a value that cycles when emitted:
+## Polyphonic Parameters
+
+Parameter words like `note`, `freq`, and `gain` consume the entire stack. If you push multiple values before a param word, you get polyphony:
 
 ```forth
-0.3 0.5 0.7 3 tcycle gain
+60 64 67 note sine s .    ;; emits 3 voices with notes 60, 64, 67
 ```
 
-If you emit multiple times in one step (using `at`), each emit gets the next value from the cycle.
+This works for any param and for the sound word itself:
+
+```forth
+440 880 freq sine tri s .    ;; 2 voices: sine at 440, tri at 880
+```
+
+When params have different lengths, shorter lists cycle:
+
+```forth
+60 64 67 note           ;; 3 notes
+0.5 1.0 gain            ;; 2 gains (cycles: 0.5, 1.0, 0.5)
+sine s .                ;; emits 3 voices
+```
+
+Polyphony multiplies with `at` deltas:
+
+```forth
+0 0.5 at                ;; 2 time points
+60 64 note              ;; 2 notes
+sine s .                ;; emits 4 voices (2 notes × 2 times)
+```
 
 ## Summary