AIFF to M4R Converter-- convert aiff to m4r format
How to change AIFF files to M4R files
As a professional conversion software for iPhone users, AIFF to M4R Converter provides many practical functions. It supports converting AVI, MPEG, WMV, DivX, MP4, H.264/AVC, AVCHD, MKV, RM, MOV, XviD, 3GP, WMA, WAV, RA, M4A, MP3 to M4R iPhone ringtone, and transfer the converted M4R ringtone to iPhone directly without iTunes. You can also clip any music segment from video/audio file and turn it into iPhone ringtone with it.
Guide: how to convert aiff to m4r with AIFF to M4R Converter
Following the instruction, you can easily install the converter in your computer and run it. The converter is easy to use, which you can find from its friendly interface:

Before load files, click "PC to iPhone" button.
1. Add AIFF file you intend to convert. You can click "Add File " button to choose video or audio files.

2. Edit the music. There are two sliders you can see. The first is start time. Another is end time. You can drag them to exact a clip you like or change the number to make it. Play button is to pre-listen to the add music or the clip.

3. Set the destination folder by clicking "Browse" button. Of course, you can keep the defaulted one. (D:\My Documents). If you have connected your iphone to pc, you can check "Export to iPhone" to transfer the converted file to iphone directly before converting. Then click "Import" to convert aiff to m4r.
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A progress interface will be activated to show you the conversion status. When it goes to the end, the conversion is finished.
Following the guide, you can convert video formats like AVI, MPEG, WMV, DivX, MP4, H.264/AVC, AVCHD, MKV, audio formats like WMA, WAV, RA, M4A, MP3, AIFF, AAC to iphone ringtone in M4R format.