Problem: Installed or updated Altiverb 7 and now it does not show up in Logic.
Solution: Restart your mac.

Somehow (we are still trying to find out why) the macOS ignores Altiverb 7 until the computer has been restarted. This is why Logic (or Ableton Live, or any other DAW that uses Audio Unit plug-ins) does not show the Altiverb

Altiverb 7 supports loading your own files as IRs.
Any wav audio file can be used as impulse response.

Simply add your file(s) to your User Created IRs folder, the default location is:
/Users/yourusername/Library/Application Support/Altiverb/ *

Your third party impulse responses folders, libraries can be loaded through:
/Users/Shared/Altiverb/Third Party libraries

If you have recorded the Altiverb sine sweep to create an IR, then drag your mono or stereo recordings as wave file onto the drag and drop import window in the Altiverb plug-in. You can choose to save your IR into the User Created IRs folder.

Altiverb 7 Windows Authorization Error: Altiverb 7 Regular cannot run because it is corrupted please try reinstalling the product

This error means the graphics card driver on your system is not up to date. Even when Windows states this is up to date, Altiverb 7 can generate this error and you will find there is a newer driver available (and this will solve this error).

Please try to update your graphics card driver.

Find out what graphics card you have in your system (right click on your desktop, choose change screen resolution, hit advanced settings, that would show you the manufacturer’s name and the model).
Then please go to the manufacturer’s website, hit support/drivers and find the latest driver for your graphics card and download and install this.
Restart your computer.
The problem should be gone now.

There is a little trick you need to pull off to get this to work:

• open the add fx window in Reaper on the 6 channel track
• then right click on the Altiverb plug-in and make sure this option is checked:
• ☑️ inform plug-in when track channel count changes

When you then insert Altiverb 7 it should become 6 in 6 out and you will be able to choose the surround IRs in the IR Browser.

Most likely you were working with old older (version 7.0/7.1) IR set before and you recently installed the latest Altiverb 7 plug-in updater. This new Altiverb 7 plug-in however requires the latest core IR set.
To fix this please download the latest first time full Altiverb 7 installer and run this.
Once you installed this you will have all IRs again.

> You can request a link to the latest downloads at:
www.audioease.com/download

Altiverb 7 Regular and XL sound exactly the same and come with the same IRs.
There are three differences:

Altiverb 7 Regular supports

• up to stereo input and output
• sampling rates up to 96kHz
• plug-in formats on windows: aax native and vst, on mac: aax native, vst, audio unit, mas and rtas

Altiverb 7 XL supports:

• up to 5.1 surround in and output
• sampling rates up to 384 kHz
• all plug-ins formats Altiverb 7 Regular supports + TDM on Mac OS X

So, in short, if you do not have sessions on 192k and you work in stereo only, Altiverb 7 Regular will do just fine.
If, at a later stage, you would like to upgrade from Regular to XL this is possible. The upgrade cost is just the price difference so you won't loose any money going for Regular first.

There is a situation where the Altiverb plug-in can revert to default settings when loading a project in Digital Performer.

This is caused by the fact the Digital Performer (DP) supports three plug-in formats: MAS, AU (audio unit) and VST.

How?
Example: When you save a project with the Altiverb MAS plug-in. And you then change the default plug-in type in DP to AU and re-open this project. DP will load Altiverb, but DP fails to transfer the saved Altiverb MAS plug-in settings to the now Altiverb AU plug-in, and Altiverb then reverts to loading the default settings (which is the Teldex IR).

When this suddenly occurs you are most likely using a different plug-in format then you used before. Try to find out what you used before, force DP to load this Altiverb plug-in from the plug-in settings in the DP preferences and then restart DP and re-open your project. The right settings should load again then.

If you need any help with this let us know. Send us for instance a project file that will not open correctly, then we can quickly help you out.

What is the difference between the mono to stereo and the stereo to stereo options in a stereo out Altiverb ?

Best way to understand this is to go back with me to our sampling session when we recorded to room's acoustics for the IR in Altiverb.

mono to stereo
We put a single speaker in the center of the stage and two mics in the audience.

This results in a mono to stereo IR.
When you playback your audio through this IR in Altiverb, it will sound like your audio comes out of that single speaker from the center of the stage (mono!) picked up with two microphones (stereo!).
This IR gives a stereo reverb, however the input is (mixed to) mono, as there is only a single source on stage.

When you want to process a vocal (mono) or direct recorded electrical guitar or something where the panning is not important the mono to stereo IR will do just fine (pro: costs half of the processing then a stereo-to-stereo IR, so it is more efficient in cpu and memory).

stereo to stereo
back to recording the room
this time we put two speakers on stage, one on the left and one on the right side of the stage and we record again with the two mics in the audience.

When you playback your stereo audio through this IR in Altiverb your stereo signal comes out of these two speakers.
Easy to picture here that your original panning will be maintained using a stereo to stereo IR.

So basically it comes down to this:
is your input stereo or is it panned in stereo ?
use a stereo - stereo IR, else you will loose the stereo information in the reverb (although the reverb is stereo).

Sometimes even when using stereo panned sources a mono to stereo IR can be preferred as you do not want the panning to be reflected in the reverb levels. But this is a mixing decision which depends on taste mostly (and music style) and I dare not to advice on that :-)

We have removed some sets from the Altiverb IR library (mainly user submitted IR sets) that do not meet up to our current standards. The Speakers and Phones set is one of these. You can copy the original set from your Altiverb 6 Impulse Responses folder (if you still have this) to the Third Party IRs folder in the Altiverb 7 Impulse Responses folder.
Then you can then load these IRs again in Altiverb 7.

You can also download the original set from:
http://fokkie.home.xs4all.nl/IR.htm