File size: 1,576 Bytes
bd95217 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | """Quick test: capture loopback audio and check if data is non-zero."""
import pyaudiowpatch as pyaudio
import numpy as np
pa = pyaudio.PyAudio()
# Find loopback device
wasapi = None
for i in range(pa.get_host_api_count()):
info = pa.get_host_api_info_by_index(i)
if "WASAPI" in info["name"]:
wasapi = info
break
print(f"WASAPI: {wasapi['name']}")
loopback = None
for i in range(pa.get_device_count()):
dev = pa.get_device_info_by_index(i)
if dev.get("isLoopbackDevice", False):
loopback = dev
print(f" Loopback: [{i}] {dev['name']} ch={dev['maxInputChannels']} rate={dev['defaultSampleRate']}")
if loopback is None:
print("No loopback device found!")
pa.terminate()
exit(1)
channels = loopback["maxInputChannels"]
rate = int(loopback["defaultSampleRate"])
chunk = int(rate * 0.5)
print(f"\nCapturing from: {loopback['name']}")
print(f"Config: {rate}Hz, {channels}ch, chunk={chunk}")
stream = pa.open(
format=pyaudio.paFloat32,
channels=channels,
rate=rate,
input=True,
input_device_index=loopback["index"],
frames_per_buffer=chunk,
)
print("\nReading 6 chunks (3 seconds)...")
for i in range(6):
data = stream.read(chunk, exception_on_overflow=False)
audio = np.frombuffer(data, dtype=np.float32)
mono = audio.reshape(-1, channels).mean(axis=1) if channels > 1 else audio
rms = np.sqrt(np.mean(mono**2))
print(f" Chunk {i}: samples={len(mono)}, rms={rms:.6f}, max={np.abs(mono).max():.6f}")
stream.stop_stream()
stream.close()
pa.terminate()
print("\nDone.")
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