How Do I Convert WAV to M4R for iPhone Ringtones?

Another solid free WAV to M4R converter is to use FAAC, an open-source AAC encoder available as a command-line tool. Since iPhone ringtones (M4R) are essentially AAC files with a different file extension, you can convert WAV files to AAC and then simply rename the resulting files to use the ".m4r" extension.

On many Linux distributions, you can install FAAC using your package manager (for example, using apt on Ubuntu:

sudo apt-get install faac

For Windows or macOS, download the appropriate binary or build FAAC from source (instructions are typically available on the official FAAC website).

Once FAAC is installed, convert a WAV file to AAC using a command like the following:

faac -b 128 -o output.m4a input.wav

Here, -b 128 sets the bitrate to 128 kbps (you can adjust this based on your quality preference). The command converts input.wav into an AAC file named output.m4a.

To use the file as an iPhone ringtone, simply rename the file extension from .m4a to .m4r. 

If you have multiple WAV files, you can write a simple shell script or batch file to loop through all WAV files in a directory and start converting .wav to .m4r accordingly.