Init example project 0.1.0

src/example.py

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+import sounddevice as sd
+import soundfile as sf
+import settings
+import numpy as np
+
+
+def select_device(device_type='output'):
+    i = 0
+    for device in device_list:  # 选择设备
+        host_name = sd.query_hostapis(device['hostapi'])['name']
+        if device_type == 'input' and 'PawPaw Microphone Array' in device['name'] and host_api in host_name \
+                and input_channel == device['max_input_channels']:
+            print("找到一个PawPaw输入设备: " + str(i) + " " + device['name'])
+            sd.default.device = i  # 设置输入设备
+        if device_type == 'output' and 'PawPaw Microphone Array' in device['name'] and host_api in host_name \
+                and output_channels == device['max_output_channels']:
+            print("找到一个PawPaw输出设备: " + str(i) + " " + device['name'])
+            sd.default.device = i  # 设置输出设备
+        i = i + 1
+
+
+def play_pcm_raw():
+    # path = '../test_audio/test_audio_48k.raw'
+    path = '../recorded_audio/testfile.raw'  # 此处的.raw文件即为pcm格式音频
+    # 解析pcm文件并存放到数据流中
+    # 需要4个变量：文件路径，音频通道数，采样率，音频子类型
+    # 此处的音频位深为16位，故选用PCM_16，关于如何寻找音频的子类型，参考README.md
+    select_device(device_type='output')
+    data, fs = sf.read(path, channels=2, samplerate=48000, subtype='PCM_16')
+    sd.play(data, fs)
+    sd.wait()
+
+
+def recording():
+    duration = 3  # 录制时间
+    fs = 48000  # 采样率
+    select_device(device_type='input')
+    my_recording = sd.rec(int(duration * fs), samplerate=fs, channels=18)  # 将音频写入输入流
+    sd.wait()
+
+    #  提取前两个通道的音频，保存为raw文件供测试播放
+    stereo_array = np.empty((len(my_recording), 2))
+    flag = 0
+    for frame in my_recording:
+        stereo_array[flag][0] = frame[0]
+        stereo_array[flag][1] = frame[1]
+        flag = flag + 1
+    print(stereo_array)
+    sf.write('../recorded_audio/testfile.raw', data=stereo_array, subtype='PCM_16', samplerate=fs)
+
+
+if __name__ == '__main__':
+    host_api = settings.HOST_API  # 不同平台的音频接口不同，例如windows可用WASAPI
+    input_channel = settings.MAX_INPUT_CHANNEL
+    output_channels = settings.MAX_OUTPUT_CHANNEL
+
+    device_list = sd.query_devices()  # 获取电脑上的所有音频设备
+    recording()
+    while True:
+        play_pcm_raw()
+        user_input = input("输入1继续播放，输入2退出测试")
+        if user_input == '1':
+            continue
+        if user_input == '2':
+            break
+    print("结束")

src/settings.py

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+HOST_API = 'WASAPI'
+MAX_INPUT_CHANNEL = 18
+MAX_OUTPUT_CHANNEL = 2