gistfile1.txt

extends Node

# Generate a synthetic audio stream
func generate_test_stream(sample_rate: int = 48000, duration: float = 5.0) -> AudioStreamGenerator:
    var generator = AudioStreamGenerator.new()
    generator.mix_rate = sample_rate

    var playback = AudioStreamGeneratorPlayback.new(generator)
    var t = 0.0
    while t < duration:
        var sample = 0.0
        if t < 1.0:  # 440 Hz tone
            sample = sin(2.0 * PI * 440.0 * t)
        elif t < 1.5:  # Silence
            sample = 0.0
        elif t < 3.5:  # 880 Hz tone with amplitude modulation
            sample = sin(2.0 * PI * 880.0 * t) * (t - 1.5)
        
        # Append the sample to the audio stream
        playback.push_buffer(Vector2(sample, sample))  # Stereo output
        t += 1.0 / sample_rate

    return generator