Audio Simple Reverb

Documentation

Class name: SaltAudioSimpleReverb
Category: SALT/Audio/Effect
Output node: False

The SaltAudioSimpleReverb node applies a reverb effect to an audio input, simulating the sound reflection characteristics of a physical space. It allows for the adjustment of reverb level and decay to tailor the effect.

Input types

Required

audio
- The audio input to which the reverb effect will be applied. It serves as the raw material for the reverb simulation.
- Comfy dtype: AUDIO
- Python dtype: bytes
reverb_level
- Determines the intensity of the reverb effect applied to the audio, influencing the perceived size and reflectiveness of the virtual space.
- Comfy dtype: FLOAT
- Python dtype: float
decay
- Controls the rate at which the reverb effect fades away, simulating the absorption characteristics of the simulated space.
- Comfy dtype: FLOAT
- Python dtype: float

Output types

audio
- Comfy dtype: AUDIO
- The audio output with the reverb effect applied, simulating the acoustic characteristics of a reverberant space.
- Python dtype: bytes

Usage tips

Infra type: CPU
Common nodes: unknown

Source code

class SaltAudioSimpleReverb:
    @classmethod
    def INPUT_TYPES(cls):
        return {
            "required": {
                "audio": ("AUDIO", {}),
                "reverb_level": ("FLOAT", {"default": 0.5, "min": 0.1, "max": 1.0, "step": 0.01}),
                "decay": ("FLOAT", {"default": 0.5, "min": 0.1, "max": 1.0, "step": 0.01}),
            },
        }

    RETURN_TYPES = ("AUDIO",)
    RETURN_NAMES = ("audio",)
    FUNCTION = "apply_reverb"
    CATEGORY = "SALT/Audio/Effect"

    def apply_reverb(self, audio, reverb_level, decay):
        original = AudioSegment.from_file(io.BytesIO(audio), format="wav")
        reverb_duration = int(len(original) * reverb_level)
        output = original

        for overlay_delay in range(50, reverb_duration, 50):
            decayed_overlay = original - (decay * overlay_delay)
            output = output.overlay(decayed_overlay, position=overlay_delay)

        return (get_buffer(output),)

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