I3DL2 Reverb is an effect that adds a spatial reverb effect compliant with I3DL2 (Interactive 3D Audio Level 2).
After mixing all outputs from 5.1 ch to 7.1.4 ch into a stereo mix, it becomes a surround reverb that returns individual reverberation to up to 12 channels (L, C, R, Ls, Rs, Lsb, Rsb, Ltf, Rtf, Ltb, Rtb) depending on the number of output channels.
After downmixing 5.1 ch or 7.1 ch output to stereo, it becomes a surround reverb that returns individual reverberation to a maximum of 7 channels: L, C, R, Ls, Rs, Lsb and Rsb. Version 1 is for compatibility purposes, so the maximum number of inputs and outputs is 8 channels.
For this reason, when using a 7.1.4 ch setup, the top speaker component is not downmixed and is truncated.
If you need to operate with more than 9 channels, please use version 2.
There are two versions of I3DL2 reverb for CRI Atom Craft Ver.3.47.00 and later.
In version 2, the internal algorithm has been revised to more accurately reflect each parameter of the I3DL2 standard.
When creating a new I3DL2 reverb in CRI Atom Craft Ver.3.47.00 or later, the default setting will be version 2.
There will be no automatic version upgrade for version settings.
Projects and data created with tools prior to CRI Atom Craft Ver.3.47.00 will be played back in version 1.
If you are using version 2 with a project created with a tool earlier than CRI Atom Craft Ver.3.47.00, please change the setting value.
| Item | Description | Initial value | Lower limit | Upper limit |
|---|---|---|---|---|
| Module Version | Specifies the internal version of the reverb. | Version 2 | ||
| Reverb Presets | Reverb presets. Select the type to update the parameters. | GENERIC | ||
| Effect Volume (Room) | Controls the main output volume (in millibels) of the entire reverb effect. | -1000.0 mB | -10,000.0 mB | 0 mB |
| High Frequency Volume (RoomHF) | Controls the relative volume (in millibels) of the high frequency sound at the reference frequency (fHFReference). | -100.0 mB | -10,000.0 mB | 0 mB |
| Decay Time of late reverberation (DecayTime) | Time (seconds) for late reverberation to decay by 60dB. | 1.49 sec | 0.1 sec | 20.0 sec |
| Decay rate of high frequencies (DecayHFRatio) | The ratio of high frequency decay to low frequency decay in the late reverberation. | 0.83 | 0.1 | 2.0 |
| Volume of early reflections (Reflections) | Volume of early reflections in millibels. | -2602.0 mB | -10,000.0 mB | 1000.0 mB |
| Early reflections Delay (Reflections Delay) | The delay (in seconds) between the input signal and the first reflection. | 0.007 sec | 0.0 sec | 0.3 sec |
| Late reverb volume (Reverb) | Late reverb volume (millibels). | 200.0 mB | -10,000.0 mB | 2000.0 mB |
| Late reverberation delay (ReverbDelay) | Delay from the first reflection to the late reverberation (in seconds). | 0.011 sec | 0.0 sec | 0.1 sec |
| Echo Density (Diffusion) | Echo density of late reverberation. If it is low, the late reverberation will be coarse. | 100.0 % | 0.0 % | 100.0 % |
| Modal (Density) | Modal density of late reverberation. If it is low, the late reverberation will sound metallic. | 100.0 % | 0.0 % | 100.0 % |
| Reference Frequency (HFReference) | The reference frequency of RoomHF. | 5000.0 Hz | 20.0 Hz | 20,000.0 Hz |
| Front Input | Front component input level (mB). | 0.0 mB | -10,000.0 mB | 0.0 mB |
| Rear Input | Rear component input level (mB). | 0.0 mB | -10,000.0 mB | 0.0 mB |
| Center Input | Input level of the center component (millibels). | -10000.0 mB | -10,000.0 mB | 0.0 mB |
| Front Output | Front component output level in millibels. | 0.0 mB | -10,000.0 mB | 0.0 mB |
| Rear Out | Rear component output level (mB). | 0.0 mB | -10,000.0 mB | 0.0 mB |
| Center output | Output level of the center component (millibels). | -10000.0 mB | -10,000.0 mB | 0.0 mB |