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{
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{
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"id": "b2d45592-5695-40ec-ad90-7d03275337a6",
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"source": [
"# import scipy.signal\n",
"\n",
"# def high_pass_filter(audio, sr, cutoff=200, order=3):\n",
"# \"\"\"\n",
"# Applies a high-pass filter to an audio signal.\n",
"\n",
"# Parameters:\n",
"# audio (numpy array): The input audio signal.\n",
"# sr (int): The sample rate of the audio signal.\n",
"# cutoff (float): The cutoff frequency in Hz. Default is 100 Hz.\n",
"# order (int): The order of the filter. Default is 5.\n",
" \n",
"# Returns:\n",
"# numpy array: The filtered audio signal.\n",
"# \"\"\"\n",
"# # Design the high-pass filter using a Butterworth filter design\n",
"# sos = scipy.signal.butter(order, cutoff, btype='highpass', fs=sr, output='sos')\n",
" \n",
"# # Apply the filter using sosfilt (second-order sections filter)\n",
"# filtered_audio = scipy.signal.sosfilt(sos, audio)\n",
" \n",
"# return filtered_audio"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "8a1efa78-61d4-4545-b50a-080161bb6aa5",
"metadata": {},
"outputs": [],
"source": [
"def high_pass_filter(audio, sr, cutoff=300):\n",
" # Design a Butterworth high-pass filter\n",
" nyquist = 0.5 * sr\n",
" normal_cutoff = cutoff / nyquist\n",
" b, a = butter(1, normal_cutoff, btype='high', analog=False)\n",
" filtered_audio = lfilter(b, a, audio)\n",
" return filtered_audio"
]
}
],
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