M4A to M4R Converter
M4A to M4R is a versatile M4R converter software to help you convert M4A file to M4R, change M4A files to M4R ringtone for iPhone. Other audio files can also be converted to iPhone ringtone M4R formats.
M4A to M4R provides trimming function for you to get any clip from the source file, edit it and make it as your ringtone. M4A to M4R also allows you to pre-listen the source file and trimmed file. It even helps directly upload ringtone to iPhone after conversion.
M4A to M4R converter free download is available here, have a try.
Free Download Size: 4.6MB
Buy Now Only $14.95
Note: M4A to M4R only works on Windows NT4/2000/2003/XP and Windows Vista.
How to convert M4A to M4R
Download and install M4A to M4R, launch it and follow these steps:

Step 1. Click the upper
to input M4A file you want to convert to iPhone ringtone, you can click
to pre-listen the source file to ensure that you load the right one.
Step 2. Drag the triangle sliders or input time values to trim file and get certain clip. Click
to pre-listen the part you trimmed to get the exact part as you want.
Step 3. Click
on the right side of Local Output Folder to set output path.
Step 4. Check Export to iPhone to directly upload the output files to iPhone after conversion.
Step 5. Click
to start the converting.
M4A to M4R enables you to easily convert M4A files to M4R ringtone files for iPhone. To create your own iPhone ringtone is easier than ever with this powerful M4A to M4R.
Audio: MP3, WMA, AAC, WAV, OGG, M4A, RA, RAM, AC3, MP2, etc.
Video: AVI, MPEG, WMV, MP4, FLV, MKV, H.264/MPEG-4, DivX, XviD, MOV, RM, RMVB, M4V, VOB, ASF, 3GP, 3G2, H.264, QT, MPV, etc.