O1A Decoder - IMAX 5.0, 6.0 and 12.0
Host Support
O1A Decoder - IMAX 5.0
| Host Type | Support |
|---|
| AAX | Yes, output mapped to standard 5.0 |
|---|
| VST2 | Yes |
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O1A Decoder - IMAX 6.0
| Host Type | Support |
|---|
| AAX | Yes, output mapped to standard 6.0 |
|---|
| VST2 | Yes |
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O1A Decoder - IMAX 12.0
| Host Type | Support |
|---|
| AAX | Yes, output mapped to 7.1.4 |
|---|
| VST2 | Yes |
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Audio
O1A Decoder - IMAX 5.0
| Channels | Content |
|---|
| Input | 4 | O1A |
|---|
| Output | 5 | IMAX 5.0 (mapped to standard 5.0 for AAX) |
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O1A Decoder - IMAX 6.0
| Channels | Content |
|---|
| Input | 4 | O1A |
|---|
| Output | 6 | IMAX 6.0 (mapped to standard 6.0 for AAX) |
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O1A Decoder - IMAX 12.0
| Channels | Content |
|---|
| Input | 4 | O1A |
|---|
| Output | 12 | IMAX 12.0 (mapped to 7.1.4 for AAX) |
|---|
Controls
Description
These plugins take a first order ambisonics (O1A) mix and decode it as IMAX surround mixes.
The AAX version of the IMAX 12.0 plugin requires Pro Tools 2023.6 or later.
IMAX 5.0 Channels
The channel ordering used for IMAX 5.0 is as follows:
| Channel | AAX | VST |
|---|
| 1 | Front Left | Front Left |
|---|
| 2 | Front Centre | Front Right |
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| 3 | Front Right | Front Centre |
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| 4 | Rear Left (mapped to Left Surround) | Rear Left |
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| 5 | Rear Right (mapped to Right Surround) | Rear Right |
|---|
For AAX, note that this is mapped to standard 5.0.
IMAX 6.0 Channels
| Channel | AAX | VST |
|---|
| 1 | Front Left | Front Left |
|---|
| 2 | Front Centre | Front Right |
|---|
| 3 | Front Right | Front Centre |
|---|
| 4 | Rear Left (mapped to Left Surround) | Front Centre Overhead |
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| 5 | Front Centre Overhead (mapped to Centre Surround) | Rear Left |
|---|
| 6 | Rear Right (mapped to Right Surround) | Rear Right |
|---|
For AAX, note that this is mapped to standard 6.0, with the IMAX Front Centre Overhead channel mapped to the Centre Surround in standard 6.0 (i.e. at the back).
IMAX 12.0 Channels
| Channel | VST |
|---|
| 1 | Front Left |
| 2 | Front Right |
| 3 | Front Centre |
| 4 | Front Centre Overhead |
| 5 | Rear Left |
| 6 | Rear Right |
| 7 | Side Left |
| 8 | Side Right |
| 9 | Overhead Front Left |
| 10 | Overhead Front Right |
| 11 | Overhead Rear Left |
| 12 | Overhead Rear Right |
IMAX systems use speakers with wider bandwidth than typical cinema systems. No Low Frequency Effect (LFE) channel is used in the mix formats. Also note that the last two channels in IMAX 5.0 and 6.0 correspond to rear speakers, not side or surround speakers.
The plugin is available in the O1A Decoding plugin library.
Controls
Three methods are supported, "Basic", "Reconstruction" and "Tinted Reconstruction". Generally, "Basic" is recommended except where the speaker rig to be used for playback is known and has been set up accurately.
| Method | Description |
|---|
| Basic | This method produces a resilient decoding which should play well on a range of speaker systems including large venues. |
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| Reconstruction | This method controls the soundfield at the centre of the listening space to produce a clearer spatial image. It relies on the speaker layout being set up accurately. |
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| Tinted Reconstruction | This variant of the Reconstruction method performs HRTF-based tinting on the audio stream to strengthen the spatial image. Again, it relies on the speaker layout being set up accurately. |
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