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28 lines
761 B
GDScript
28 lines
761 B
GDScript
extends Node
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var sample_hz = 22050.0 # Keep the number of samples to mix low, GDScript is not super fast.
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var pulse_hz = 440.0
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var phase = 0.0
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var playback: AudioStreamPlayback = null # Actual playback stream, assigned in _ready().
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func _fill_buffer():
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var increment = pulse_hz / sample_hz
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var to_fill = playback.get_frames_available()
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while to_fill > 0:
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playback.push_frame(Vector2.ONE * sin(phase * TAU)) # Audio frames are stereo.
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phase = fmod(phase + increment, 1.0)
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to_fill -= 1
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func _process(_delta):
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_fill_buffer()
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func _ready():
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$Player.stream.mix_rate = sample_hz # Setting mix rate is only possible before play().
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playback = $Player.get_stream_playback()
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_fill_buffer() # Prefill, do before play() to avoid delay.
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$Player.play()
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