init : making project

+"""PyAudio Example: Audio wire between input and output. Callback version."""
+
+import time
+import sys
+import pyaudio
+import numpy as np
+
+
+DURATION = 5  # seconds
+
+delay_buffer = np.zeros((44100, 2), dtype=np.float32)
+
+def callback(in_data, frame_count, time_info, status):
+    global delay_buffer
+    audio_data = np.frombuffer(in_data, dtype=np.float32).reshape(frame_count, 2)
+    delayed_data = np.concatenate((delay_buffer, audio_data))
+    delay_buffer = delayed_data[frame_count:]
+    return (audio_data + 0.5 * delay_buffer).tobytes(), pyaudio.paContinue
+
+p = pyaudio.PyAudio()
+stream = p.open(format=p.get_format_from_width(2),
+                channels=1,
+                rate=44100,
+                input=True,
+                output=True,
+                frames_per_buffer=1024,
+
+                stream_callback=callback)
+
+start = time.time()
+while stream.is_active() and (time.time() - start) < DURATION:
+    time.sleep(0.1)
+
+stream.close()
+p.terminate()
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+import pyaudio
+import numpy as np
+
+pa = pyaudio.PyAudio()
+delay_buffer = np.zeros((44100, 2), dtype=np.float32)
+
+def callback(in_data, frame_count, time_info, status):
+    global delay_buffer
+    audio_data = np.frombuffer(in_data, dtype=np.float32).reshape(frame_count, 2)
+    delayed_data = np.concatenate((delay_buffer, audio_data))
+    delay_buffer = delayed_data[frame_count:]
+    return (audio_data + 0.5 * delay_buffer).tobytes(), pyaudio.paContinue
+RATE = 44100
+CHUNK = 1024
+
+stream = pa.open(format=pyaudio.paFloat32,
+                 channels=1,
+                 rate=RATE,
+                 input=True,
+                 output=True,
+                 frames_per_buffer=CHUNK,
+                 stream_callback=callback)
+
+stream.start_stream()
+# keep the stream running for a few seconds
+
+for i in range(0, int(RATE / CHUNK * 30)):
+    stream.write(stream.read(CHUNK))
+
+stream.stop()
+stream.close()
+pa.terminate()

+import numpy as np
+import pyaudio
+import time
+
+pa = pyaudio.PyAudio()
+delay_buffer = np.zeros((44100, 1), dtype=np.float32)
+
+def callback(in_data, frame_count, time_info, status):
+    global delay_buffer
+    audio_data = np.frombuffer(in_data, dtype=np.float32).reshape(1024, 1)
+    delayed_data = np.concatenate((delay_buffer, audio_data))
+    delay_buffer = delayed_data[frame_count:]
+    return (audio_data + 0.5 * delay_buffer).tobytes(), pyaudio.paContinue
+
+stream = pa.open(format=pyaudio.paFloat32,
+                 channels=1,
+                 rate=1024,
+                 input=True,
+                 output=True,
+                 frames_per_buffer=44100,
+                 stream_callback=callback)
+start = time.time()
+DURATION = 30
+# keep the stream running for a few seconds
+while stream.is_active() and (time.time() - start) < DURATION:
+    time.sleep(0.1)
+
+stream.stop()
+stream.close()
+pa.terminate()
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+import sys
+
+import pyaudio
+
+RECORD_SECONDS = 5
+CHUNK = 1024
+RATE = 44100
+
+p = pyaudio.PyAudio()
+stream = p.open(format=p.get_format_from_width(2),
+                channels=1 if sys.platform == 'darwin' else 2,
+                rate=RATE,
+                input=True,
+                output=True,
+                frames_per_buffer=CHUNK)
+
+print('* recording')
+
+def add_echo(data, output_stream):
+    output_stream.write(data)
+
+
+for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
+    add_echo(stream.read(CHUNK), stream)
+
+
+print('* done')
+
+stream.close()
+p.terminate()
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