update tempo change

cosyvoice/utils/file_utils.py

@@ -45,16 +45,3 @@ def load_wav(wav, target_sr):
         assert sample_rate > target_sr, 'wav sample rate {} must be greater than {}'.format(sample_rate, target_sr)
         speech = torchaudio.transforms.Resample(orig_freq=sample_rate, new_freq=target_sr)(speech)
     return speech
-
-
-def speed_change(waveform, sample_rate, speed_factor: str):
-    effects = [
-        ["tempo", speed_factor],  # speed_factor
-        ["rate", f"{sample_rate}"]
-    ]
-    augmented_waveform, new_sample_rate = torchaudio.sox_effects.apply_effects_tensor(
-        waveform,
-        sample_rate,
-        effects
-    )
-    return augmented_waveform, new_sample_rate