Hi there,
Firstly, thank you very much for making a Linux-native version of your software; it helps people finding out about the world's best-kept secret - Linux makes the best audio platform! :-D
One thing I noticed, on your website it says that Regency supports glibc 2.22 or newer. I tried to run it on an old version of Ubuntu (20.04) that has glibc 2.31, but version 1.0.0 throws the following error:
$ ./Regency
./Regency: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.34' not found (required by ./Regency)
Not a biggie, just passing this on so that you could update your website.
Cheers!
Jan Henkins