I really, really hate hand-recoding ARPAbet.
If you do too, this might help.
helpAR is currently intended for use in RStudio. The notebook helpAR.Rmd contains directions for use with the code divided into labeled chunks.
Current status: it runs when I test it (~30ms to generate IPA equivalents for a column with 350k rows). I would like to make using it smoother for people who aren't me eventually.
If you're not me and you're using it, report issues here.