The following applies only to IR's you've created yourself, not downloaded IR installers.

Causes:
1. Altiverb has not re-scanned the “Altiverb™ Impulse Responses” folder yet.
2. Your impulse responses do not correspond with your current chosen channel
configuration in Altiverb.
3. The impulse responses were dropped too deep in the Altiverb Impulse Responses
Folder.
4. The separate files that embody the entire impulse response do not have the proper
names.
5. Altiverb™ is using a different impulse responses folder than you expect.


Solutions:
1. To re-scan the “Altiverb™ Impulse Responses” folder, quit your sequencer and start it up again.
2. Check out how many input and output channels your impulse response has, and carefully select the corresponding Altiverb. See chapter 4 for more info.
3. For the correct location of your new impulse response files check the example in chapter 10, or read chapter 7 of the PDF manual provided with the software.
4. Be sure all the sound files have the proper names. Check the example in chapter 10, or
read chapter 7.
5. Make sure Altiverb™ is using the impulse responses folder that you have installed
your impulse responses in by selecting it. To do this, activate caps lock before your
sequencer launches, to invoke the ‘Select the Altiverb™ Impulse Responses folder’
dialog.