True Stereo
Impulse responses recorded as true-stereo files allow you to create a very realistic impression of the corresponding room.
REVerence can only process true-stereo impulse response files with the following channel configuration (in exactly that order): LL, LR, RL, RR.
The channels are defined as follows:
|
Channel |
The signal from this source… |
…was recorded with this microphone |
|---|---|---|
|
LL |
left source |
left microphone |
|
LR |
left source |
right microphone |
|
RL |
right source |
left microphone |
|
RR |
right source |
right microphone |
If your true-stereo impulse responses are only available as separate mono files, you can use the Export Audio Mixdown function to create REVerence compliant interleaved files (see the Operation Manual).
REVerence automatically works in true-stereo mode if the plug-in is inserted on a stereo track and you load a 4-channel impulse response.
Therefore, if you are working with surround files, that is, 4-channel impulse responses recorded with a Quadro configuration (L/R, LS/RS), you need to insert the plug-in on an audio track with a 4.0 configuration. On a stereo track, these files would be processed in true-stereo mode, too.
So how can you prevent REVerence from unintentionally processing surround files in true-stereo mode? The answer is a Recording Method attribute that can be written to the iXML chunk of the corresponding impulse response file. Whenever you load an impulse response with a 4-channel configuration on a stereo track, REVerence searches the iXML chunk of the file. If the plug-in finds the Recording Method attribute, the following happens:
-
If the attribute is set to TrueStereo, the plug-in works in true-stereo mode.
-
If the attribute is set to A/B or Quadro, the plug-in works in normal stereo mode and processes only the L/R channels of the surround file.
You can use the Attribute Inspector in the MediaBay to tag your own impulse response files with the Recording Method attribute. For more information, see the Operation Manual.