Submitting Issues.

If your issue is that libsndfile is not able to or is incorrectly reading one of your files, please include the output of the sndfile-info program run against the file.
If you are writing a program that uses libsndfile and you think there is a bug in libsndfile, reduce your program to the minimal example, make sure you compile it with warnings on (for GCC I would recommend at least -Wall -Wextra) and that your program is warning free, and that is is error free when run under Valgrind or compiled with AddressSanitizer.

Submitting Patches.

Patches should pass all existing tests
Patches should pass all pre-commit hook tests.
Patches should always be submitted via a either Github "pull request" or a via emailed patches created using "git format-patch".
Patches for new features should include tests and documentation.
Patches to fix bugs should either pass all tests, or modify the tests in some sane way.
When a new feature is added for a particular file format and that feature makes sense for other formats, then it should also be implemented for one or two of the other formats.