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import numpy as np
import soundfile as sf
def generate_test_tone(
duration_sec=5,
sample_rate=44100,
freqs=[440, 1000, 3000],
noise_level=0.05,
amplitude=0.5,
):
t = np.linspace(0, duration_sec, int(sample_rate * duration_sec), endpoint=False)
signal = np.zeros_like(t)
# Add multiple sine waves
for freq in freqs:
signal += amplitude * np.sin(2 * np.pi * freq * t)
# Normalize to avoid clipping if multiple frequencies are added
signal /= len(freqs)
# Add white noise
noise = noise_level * np.random.normal(0, 1, signal.shape)
signal += noise
return signal
if __name__ == "__main__":
filename="test_tone.wav"
# Save to WAV file
sample_rate = 16000
signal = generate_test_tone(sample_rate=sample_rate, freqs=[1000.0, 440.0], noise_level=0.01)
sf.write(filename, signal, sample_rate)
print(f"Saved test tone to '{filename}'.")
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