WAV to M4R -- convert wav to m4r
Change WAV Files to M4R Files
WAV to M4R Converter, as a professional conversion software, has powerful converting function and editing function. The Converter can convert AVI, MPEG, WMV, DivX, MP4, FLV, AVCHD, MKV, RM, MOV, XviD, 3GP, WMA, WAV, RA, M4A, MP3 to M4R iPhone ringtone, and transfer the converted M4R ringtone to iPhone directly. It also can set exact start time and end time of the segment you want and turn it into iPhone ringtone.
How to use this WAV to M4R Converter
You can free download the Converter and install it. The program has a very beautiful pink interface, see the picture below. Let's use this software to convert wav to m4r together.

You should click "PC to iPhone" button after you connect iPhone to PC.
Click "Add File " button to import WAV file you want to set as iphone ringtone. Then exact a segment from the file if you want a clip by dragging the two sliders or change the number to reset start time and end time. Then click Play button to pre-listen to the clip.

Change destination folder by clicking "Browse" button. Click "Import" button to start the conversion. You can see a cnverting progress bar. Wait until it goes to the end, and try to set the file as iphone ringtone.

Yeah, the conversion has been finished. Following the guide, you can set any audio you like as your iphone ringtone. The Converter also can change video to iphone ringtone. Have a try.