Extract device name to settings.py

src/example.py

@@ -8,11 +8,11 @@ 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 \
+        if device_type == 'input' and settings.DEVICE_NAME 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 \
+        if device_type == 'output' and settings.DEVICE_NAME 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
@@ -20,8 +20,9 @@ def select_device(device_type='output'):
 
 
 def play_pcm_raw():
-    # path = '../test_audio/test_audio_48k.raw' # 测试播放48k音频
-    path = '../recorded_audio/testfile.raw'  # 此处的.raw文件即为pcm格式音频
+    # 去除不同的注释以播放不同的音频
+    path = '../test_audio/test_audio_48k.raw'  # 测试播放48k音频
+    # 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
@@ -36,6 +37,9 @@ def recording():
     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
+    # -------------------------------------
+    # my_recording是一个二维数组，在此示例中存放了18个通道的sample数据
+    # -------------------------------------
     sd.wait()
 
     #  提取前两个通道的音频，保存为raw文件供测试播放
@@ -46,6 +50,7 @@ def recording():
         stereo_array[flag][1] = frame[1]
         flag = flag + 1
     print(stereo_array)
+    # 存储到文件 testfile.raw
     sf.write('../recorded_audio/testfile.raw', data=stereo_array, subtype='PCM_16', samplerate=fs)
 
 
@@ -55,9 +60,10 @@ if __name__ == '__main__':
     output_channels = settings.MAX_OUTPUT_CHANNEL
 
     device_list = sd.query_devices()  # 获取电脑上的所有音频设备
-    recording()  # 播放音频
+    print(device_list)
+    recording()  # 录制
     while True:
-        play_pcm_raw()
+        play_pcm_raw()  # 播放pcm
         user_input = input("输入1继续播放，输入2退出测试")
         if user_input == '1':
             continue

src/settings.py

@@ -1,3 +1,4 @@
 HOST_API = 'WASAPI'
 MAX_INPUT_CHANNEL = 18
 MAX_OUTPUT_CHANNEL = 2
+DEVICE_NAME = 'USB Audio Device (UAC2.0)'