importing large files in audapolis fails

the error is similiar to https://stackoverflow.com/questions/62934017/file-size-6003804160-is-greater-than-possible-buffer-2147483647-in-node

Start by reproducing the failure when importing a large file and compare it with the linked Node.js buffer-size error. Trace the large-file import path to identify the failing entry point; done means files of the affected size import without this buffer error.

Written by the indexing model from the issue text.