Align the default values with the reference implementation.

examples/generate.py

@@ -1,5 +1,6 @@
 import argparse
 import datetime
+import pkgutil
 from typing import Optional
 
 import mlx.core as mx
@@ -23,16 +24,30 @@ def generate(
     generation_text: str,
     duration: float,
     model_name: str = "lucasnewman/f5-tts-mlx",
-    ref_audio_path: str = "tests/test_en_1_ref_short.wav",
-    ref_audio_text: str = "Some call me nature, others call me mother nature.",
-    sway_sampling_coef: float = 0.0,
+    ref_audio_path: Optional[str] = None,
+    ref_audio_text: Optional[str] = None,
+    cfg_strength: float = 2.0,
+    sway_sampling_coef: float = -1.0,
     seed: Optional[int] = None,
     output_path: str = "output.wav",
 ):
     f5tts = F5TTS.from_pretrained(model_name)
 
-    # load reference audio
-    audio, sr = sf.read(ref_audio_path)
+    if ref_audio_path is None:
+        data = pkgutil.get_data("f5_tts_mlx", "tests/test_en_1_ref_short.wav")
+
+        # write to a temp file
+        tmp_ref_audio_file = "/tmp/ref.wav"
+        with open(tmp_ref_audio_file, "wb") as f:
+            f.write(data)
+
+        if data is not None:
+            audio, sr = sf.read(tmp_ref_audio_file)
+            ref_audio_text = "Some call me nature, others call me mother nature."
+    else:
+        # load reference audio
+        audio, sr = sf.read(ref_audio_path)
+
     audio = mx.array(audio)
     ref_audio_duration = audio.shape[0] / SAMPLE_RATE
 
@@ -54,7 +69,7 @@ def generate(
         text=text,
         duration=frame_duration,
         steps=32,
-        cfg_strength=1,
+        cfg_strength=cfg_strength,
         sway_sampling_coef=sway_sampling_coef,
         seed=seed,
         vocoder=vocos.decode,
@@ -93,13 +108,13 @@ def generate(
     parser.add_argument(
         "--ref-audio",
         type=str,
-        default="tests/test_en_1_ref_short.wav",
+        default=None,
         help="Path to the reference audio file",
     )
     parser.add_argument(
         "--ref-text",
         type=str,
-        default="Some call me nature, others call me mother nature.",
+        default=None,
         help="Text spoken in the reference audio",
     )
     parser.add_argument(
@@ -108,14 +123,18 @@ def generate(
         default="output.wav",
         help="Path to save the generated audio output",
     )
-
+    parser.add_argument(
+        "--cfg",
+        type=float,
+        default=2.0,
+        help="Strength of classifer free guidance",
+    )
     parser.add_argument(
         "--sway-coef",
         type=float,
-        default="0.0",
+        default=-1.0,
         help="Coefficient for sway sampling",
     )
-
     parser.add_argument(
         "--seed",
         type=int,
@@ -131,6 +150,7 @@ def generate(
         model_name=args.model,
         ref_audio_path=args.ref_audio,
         ref_audio_text=args.ref_text,
+        cfg_strength=args.cfg,
         sway_sampling_coef=args.sway_coef,
         seed=args.seed,
         output_path=args.output,

f5_tts_mlx/generate.py

@@ -26,27 +26,28 @@ def generate(
     model_name: str = "lucasnewman/f5-tts-mlx",
     ref_audio_path: Optional[str] = None,
     ref_audio_text: Optional[str] = None,
-    sway_sampling_coef: float = 0.0,
+    cfg_strength: float = 2.0,
+    sway_sampling_coef: float = -1.0,
     seed: Optional[int] = None,
     output_path: str = "output.wav",
 ):
     f5tts = F5TTS.from_pretrained(model_name)
-    
+
     if ref_audio_path is None:
-        data = pkgutil.get_data('f5_tts_mlx', 'tests/test_en_1_ref_short.wav')
-        
+        data = pkgutil.get_data("f5_tts_mlx", "tests/test_en_1_ref_short.wav")
+
         # write to a temp file
-        tmp_ref_audio_file = '/tmp/ref.wav'
-        with open(tmp_ref_audio_file, 'wb') as f:
+        tmp_ref_audio_file = "/tmp/ref.wav"
+        with open(tmp_ref_audio_file, "wb") as f:
             f.write(data)
-        
+
         if data is not None:
             audio, sr = sf.read(tmp_ref_audio_file)
             ref_audio_text = "Some call me nature, others call me mother nature."
     else:
         # load reference audio
         audio, sr = sf.read(ref_audio_path)
-    
+
     audio = mx.array(audio)
     ref_audio_duration = audio.shape[0] / SAMPLE_RATE
 
@@ -68,7 +69,7 @@ def generate(
         text=text,
         duration=frame_duration,
         steps=32,
-        cfg_strength=1,
+        cfg_strength=cfg_strength,
         sway_sampling_coef=sway_sampling_coef,
         seed=seed,
         vocoder=vocos.decode,
@@ -122,14 +123,18 @@ def generate(
         default="output.wav",
         help="Path to save the generated audio output",
     )
-
+    parser.add_argument(
+        "--cfg",
+        type=float,
+        default=2.0,
+        help="Strength of classifer free guidance",
+    )
     parser.add_argument(
         "--sway-coef",
         type=float,
-        default="0.0",
+        default=-1.0,
         help="Coefficient for sway sampling",
     )
-
     parser.add_argument(
         "--seed",
         type=int,
@@ -145,6 +150,7 @@ def generate(
         model_name=args.model,
         ref_audio_path=args.ref_audio,
         ref_audio_text=args.ref_text,
+        cfg_strength=args.cfg,
         sway_sampling_coef=args.sway_coef,
         seed=args.seed,
         output_path=args.output,