Reverberación
From Audacity Development Manual
Reverberación añade tal como su nombre lo indica reverberación (repeticiones modificadas rápidas que se funden con el sonido original dando la impresión de ambiente). El efecto Reverberación está basado en el algoritmo "freeverb" original. Añadir reverberación es a veces deseado para lugares de conciertos que son muy pequeños o contienen mucha gente haciendo que la reverberación natural sea disminuida.
Aplicando una pequeña cantidad de reverberación estéreo a una señal mono duplicada sin tratar en una pista estéreo de dos canales hará que suene más natural.
Nótese que este efecto incrementa tanto el volumen como la longitud del audio, por lo que para prevenir una distorsión la "Ganancia seca" normalmente es ajustada bajo 0 dB, y para prevenir que la cola de reverberancia sea cortada la selección normalmnete será extendida más allá del término del audio, o se debe añadir un silencio al final de la pista.
- Se accede por:
Ajustes
- Room Size (%): Sets the size of the simulated room. 0% is like a closet, 100% is like a huge cathedral or large auditorium.
A big setting will simulate the reverberation effect of a large room and a small setting will simulate the effect of a small room.
- Pre-delay (ms): Delays the onset of the reverberation for the set time after the start of the original input. This also delays the onset of the reverb tail. Careful adjustment of this parameter can improve the clarity of the result.
- Reverberance (%): Sets the length of the reverberation tail.
How long the reverberation continues for - this simulates the "liveliness" of the room acoustics.
Bill 07May13: some quick and dirty experiments to determine the RT60 times (all with damping 0%, tones at 100%, wet gain 0 db, "Wet Only")
- Room Size 100%, Reverberance 0%: 0.2 sec
- Room Size 100%, Reverberance 100%: 9 sec
- Room Size 0%, Reverberance 0%: 0.13 sec
- Room Size 0%, Reverberance 100%: 0.9 sec
- Damping (%): Increasing the damping produces a more "muted" effect. The reverberation does not build up as much, and the high frequencies decay faster than the low frequencies.
Simulates the absorption of high frequencies in the reverberation.
- Tone Low (%): Setting this control below 100% reduces the low frequency components of the reverberation, creating a less "boomy" effect.
- Tone High (%): Setting this control below 100% reduces the high frequency components of the reverberation, creating a less "bright" effect.
- Wet Gain (dB): Sets the level of the reverberation effect in the mix.
- Dry Gain (dB): Sets the level of the original audio in the mix.
- Stereo Width (%): Sets the apparent "width" of the Reverb effect.
The amount of variation between left and right channels. This setting is only relevant to stereo tracks. When set at zero the effect is applied independently to left and right channels. Higher values will increase the interaction between the left and right channels, creating a more "spacious" effect.
- Wet Only: When this control is checked the wet signal (reverberation) only is returned to the track. See Examples, below, for how to use this to create a "reverb only" track that you can then mix with your original track.
The original ("dry") signal is not included in the output. This setting can be useful when previewing the effect, but would normally be disabled when applying the effect.
Preajustes
- Load: Click this button to open a dialog listing the standard presets. Click on a preset name in the list then click the button to load those settings into the effect.
User Settings
There are ten user setting "slots" available for you to save your favorite settings. They are initially named "Settings0" through "Settings9".
- Load: Click this button to open a dialog listing the user settings. Click on a setting name in the list then click the button to load that settings into the effect.
- Save: Click this button to save the current settings into a user setting. In the "Reverb Settings" dialog, click on a setting then click the button to save your settings under that name.
- Rename: Click this button to rename your user settings. In the "Reverb Settings" dialog, click on a setting then click the button to open a dialog to change the setting name. Type your setting name then click the button to change the setting name.
Ejemplos
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Always add a few seconds of silence to any track you intend to apply the Reverb effect to. The reverb tail will continue for several seconds after the sound ends. If you do not add silence to the end of the track the reverb will cut off unnaturally. |
Mantener el efecto de reverberancia en una pista separada
With this method, you duplicate the track to want to apply reverb to, then apply the Reverb effect to the duplicate track, checking the "Wet Only" checkbox in the Reverb dialog. You can then control the amount of reverb in the final mix by adjusting the Track Gain Slider on the reverb track. Steps:
- Add a few seconds of silence to the end of the track
- Click the Skip to End Transport button or press CTRL+K
- Click Generate > Silence
- Choose how much silence to add (20 seconds is the most you will ever need, 5 second will often be adequate)
- Click OK to add the silence to the end of the track
- Select the track (click on the Track Control Panel) then click Edit > Clip Boundaries > Join or press CTRL+J
- Duplicate the track (select the track then click Edit > Duplicate)
- Select the duplicate track
- Apply the Reverb effect to the track making sure to check the "Wet Only" checkbox
Añadiendo reverberación estéreo a una pista mono
It is often desirable to add reverb to a mono track (such as a vocal) but have a stereo "spread" to the reverb. This is generally more pleasing and works better when the final mix is in stereo.
Pasos:
- Add a few seconds of silence to the end of the track (as explained above)
- Duplicate the track (select the track then click Edit > Duplicate)
- From the Track Drop Down Menu select Make Stereo Track
- Select the track
- Apply the Reverb effect to the track making sure to un-check the "Wet Only" checkbox
This method can be expanded to incorporate the reverb on a separate track, as follows:
- Add a few seconds of silence to the end of the track (as explained above)
- Duplicate the track (select the track then click Edit > Duplicate)
- From the Track Drop Down Menu on the upper track select Make Stereo Track
- Select the new stereo track
- Duplicate the track (select the track then click Edit > Duplicate)
- Apply the Reverb effect to the duplicate track making sure to check the "Wet Only" checkbox
- From the Track Drop Down Menu of the original track, select "Split Stereo to Mono"
- Delete one of the two resulting mono tracks by clicking the Track Close Button
(This last step is not strictly necessary, but reduces track clutter and makes it clear that the original track is mono.)
