Update app.py

app.py

@@ -1,6 +1,7 @@
 """
 ESP32 TTS Server — Hugging Face Space
-WAV: 44100Hz, Stereo, 16-bit, Normalized + Boosted
+WAV output: 22050Hz, Mono, 8-bit unsigned
+ESP32 DAC ke liye perfect — direct mapping, no conversion
 """
 
 from flask import Flask, request, Response
@@ -13,29 +14,31 @@ from pydub.effects import normalize
 
 app = Flask(__name__)
 
-BASE_DIR   = os.path.dirname(os.path.abspath(__file__))
-CACHE_DIR  = os.path.join(BASE_DIR, "tts_cache")
+BASE_DIR  = os.path.dirname(os.path.abspath(__file__))
+CACHE_DIR = os.path.join(BASE_DIR, "tts_cache")
 os.makedirs(CACHE_DIR, exist_ok=True)
 
 
 def text_to_wav_bytes(text, lang):
-    # Step 1: gTTS → MP3 in memory (no disk write)
+    # Step 1: gTTS → MP3 in memory
     mp3_buf = io.BytesIO()
     tts = gTTS(text, lang=lang)
     tts.write_to_fp(mp3_buf)
     mp3_buf.seek(0)
 
-    # Step 2: Load + convert — 44100Hz, Stereo, 16-bit
+    # Step 2: Load audio
     audio = AudioSegment.from_file(mp3_buf, format="mp3")
-    audio = audio.set_frame_rate(44100).set_channels(2).set_sample_width(2)
 
     # Step 3: Normalize — consistent volume
     audio = normalize(audio)
 
-    # Step 4: +3dB boost — DAC output thoda weak hota hai
-    audio = audio + 3
+    # Step 4: Convert — 22050Hz, Mono, 8-bit unsigned
+    # ESP32 DAC = 8-bit (0-255), 22050Hz enough for clear voice
+    audio = audio.set_frame_rate(22050)
+    audio = audio.set_channels(1)
+    audio = audio.set_sample_width(1)   # 8-bit unsigned (0-255)
 
-    # Step 5: WAV bytes in memory
+    # Step 5: WAV bytes
     wav_buf = io.BytesIO()
     audio.export(wav_buf, format="wav")
     wav_buf.seek(0)
@@ -43,7 +46,6 @@ def text_to_wav_bytes(text, lang):
 
 
 def get_wav(text, lang):
-    # Cache check — same text pe instantly serve
     key        = hashlib.md5((text + lang).encode()).hexdigest()
     cache_path = os.path.join(CACHE_DIR, key + ".wav")