docs: remove Japanese edge notation

developer-guide/core-features/fine-grained-control.mdx

@@ -59,8 +59,7 @@
     icon="language"
     href="/developer-guide/core-features/fine-grained-control/japanese"
   >
-    OpenJTalk romaji phonemes with pitch accent digits or rising/falling edge
-    markers.
+    OpenJTalk romaji phonemes with pitch accent digits.
   </Card>
 </CardGroup>
 
@@ -84,9 +83,9 @@
 <|phoneme_start|>ha0shi1ga0<|phoneme_end|>見えます。
 ```
 
 ## Paralanguage
 
 Paralanguage controls allow you to add natural speech elements and pauses to make the generated speech sound more human-like. There are two main types of controls:
 
 ### Pause Words
 
@@ -117,7 +116,7 @@
 I am, um, an (break) engineer.
 ```
 
 You can combine paralanguage and phoneme control in the same text:
 
 ```text
 I am, um, an (break) <|phoneme_start|>EH1 N JH AH0 N IH1 R<|phoneme_end|>.

developer-guide/core-features/fine-grained-control/japanese.mdx

@@ -1,12 +1,12 @@
 ---
 title: "Japanese Phoneme Control"
 description: "Control Japanese pronunciation with romaji phonemes and pitch accent markers"
 icon: "language"
 ---
 
 ## Overview
 
 Japanese phoneme control uses OpenJTalk-style romaji phonemes plus pitch accent information. This is useful for Japanese homographs that have the same plain phoneme sequence but different pitch accents, such as `端が`, `箸が`, and `橋が`.
 
 ```text
 Standard: 橋が見えます。
@@ -27,7 +27,7 @@
 
 The following examples all share the plain phoneme sequence `h a sh i g a`, but the pitch markers disambiguate the word:
 
-- `端が` (edge + subject marker): `<|phoneme_start|>ha0shi1ga1<|phoneme_end|>`
+- `端が` (end + subject marker): `<|phoneme_start|>ha0shi1ga1<|phoneme_end|>`
 - `箸が` (chopsticks + subject marker): `<|phoneme_start|>ha1shi0ga0<|phoneme_end|>`
 - `橋が` (bridge + subject marker): `<|phoneme_start|>ha0shi1ga0<|phoneme_end|>`
 
@@ -37,16 +37,11 @@
   and adjust the digits when you need a specific accent.
 </Note>
 
 ## Relation to ttslearn Prosody Symbols
 
 The [ttslearn Japanese Tacotron recipe](https://r9y9.github.io/ttslearn/latest/notebooks/ch10_Recipe-Tacotron.html#%E3%83%95%E3%83%AB%E3%82%B3%E3%83%B3%E3%83%86%E3%82%AD%E3%82%B9%E3%83%88%E3%83%A9%E3%83%99%E3%83%AB%E3%81%8B%E3%82%89%E3%81%AE%E9%9F%B3%E7%B4%A0%E5%88%97%E3%81%8A%E3%82%88%E3%81%B3%E9%9F%BB%E5%BE%8B%E8%A8%98%E5%8F%B7%E3%81%AE%E6%8A%BD%E5%87%BA) shows how to extract phonemes and prosody symbols from OpenJTalk full-context labels. That recipe prints symbols such as `[` for a pitch rise and `]` for a pitch fall.
 
-Fish Audio phoneme tags should not contain literal `[` or `]`. Convert that prosody into either:
-
-- Digit notation, such as `ha0shi1ga0`.
-- Edge notation, such as `haJshiLga`, where `J` marks a rising edge and `L` marks a falling edge.
-
-Use one notation style consistently inside each phoneme tag.
+Fish Audio phoneme tags should not contain literal `[` or `]`. Convert that prosody into digit notation, such as `ha0shi1ga0`.
 
 ## Generate Japanese Phonemes
 
@@ -65,12 +60,7 @@
 JAPANESE_VOWELS = "aiueoAIUEON"
 
 
-def japanese_to_romaji_with_accent(
-    sentence: str,
-    boundary: bool = False,
-    rise_edge: str = "J",
-    fall_edge: str = "L",
-) -> str:
+def japanese_to_romaji_with_accent(sentence: str) -> str:
     text = ""
     labels = pyopenjtalk.extract_fullcontext(sentence)
     level = -1
@@ -94,40 +84,27 @@
 
         # Accent phrase boundary
         if a3 == 1 and a2_next == 1:
-            if boundary:
-                if level >= 0:
-                    text += " "
-            else:
-                if level >= 0:
-                    text += str(level)
+            if level >= 0:
+                text += str(level)
             level = -1
         # Falling
         elif a1 == 0 and a2_next == a2 + 1:
             level = 0
-            if boundary:
-                text += fall_edge
-            else:
-                text += "1"
+            text += "1"
         # Rising
         elif a2 == 1 and a2_next == 2:
             level = 1
-            if boundary:
-                text += rise_edge
-            else:
-                text += "0"
+            text += "0"
         elif phoneme in JAPANESE_VOWELS:
             if level < 0:
                 level = 0
-            if not boundary:
-                text += str(level)
+            text += str(level)
 
     return text
 
 
 print(japanese_to_romaji_with_accent("橋が"))
 # ha0shi1ga0
-print(japanese_to_romaji_with_accent("橋が", boundary=True))
-# haJshiLga
 ```
 
 Then place the result inside the phoneme tags:
@@ -160,4 +137,4 @@
 <|phoneme_start|>very long paragraph with multiple clauses...<|phoneme_end|>
 ```
 
 If your text contains symbols that OpenJTalk should read as words, normalize them before conversion. For example, the training preprocessor converted `％` to `パーセント` before extracting phonemes.