tests/test_mic.py

import sounddevice as sd
import numpy as np
import time
import queue

def test_microphone(duration=3):
    devices = sd.query_devices()
    print("\nScanning all input devices for signal...\n")
    
    for i, dev in enumerate(devices):
        if dev['max_input_channels'] > 0:
            print(f"Testing Device {i}: {dev['name']}")
            try:
                q = queue.Queue()
                def callback(indata, frames, time, status):
                    q.put(indata.copy())

                # Use device specific sample rate to avoid mismatches
                sr = int(dev['default_samplerate'])
                
                with sd.InputStream(device=i, samplerate=sr, channels=1, dtype=np.int16, callback=callback):
                    start = time.time()
                    max_amp = 0
                    while time.time() - start < 1.0: # Test for 1 second
                        try:
                            data = q.get(timeout=0.1)
                            current_max = np.max(np.abs(data))
                            max_amp = max(max_amp, current_max)
                        except queue.Empty:
                            pass
                            
                    print(f"  -> Max Amplitude: {max_amp}")
                    if max_amp > 100:
                        print("  ✅ SIGNAL DETECTED!")
                    else:
                        print("  ❌ No Signal (Silence)")
                        
            except Exception as e:
                print(f"  -> Error: {e}")
            print("-" * 30)

if __name__ == "__main__":
    test_microphone()