I work for Swiss national Radio where the above hall has been used as a recording space for almost 80 years. The operative crews moved out of the building where this hall is, so it was time for me to record an IR of that great space. Attached underneath you will find original recordings of the Altiverb warble that you can drop into your copy of Altiverb. There is a subfolder with conventional IRs that can be used in all other convolution engines.

Over on my Insta, you can hear this beast:

https://www.instagram.com/tv/CftoJIjK52J/?utm_source=ig_web_button_share_sheet

Download the files here:

https://drive.google.com/drive/folders/1--a1zCzDtJk267kNF4W62811yTo6I5Ov?usp=sharing