- Extension
- .m4r
- .asf
- Format
- Binary
- Binary
- Category
- Audio
- Video
- Developer
- Apple Inc.
- Microsoft
- Description
- M4R is an iTunes ringtone file that stores mono channel audio. They are identical to the M4A format files only that they are correctly used for ringtones.
- An ASF file is a media file stored in the Advanced Systems Format (ASF), a proprietary video and audio container format. It contains audio and video data and optional metadata, such as title, author, and copyright bibliographic data. ASF files are developed by Microsoft primarily for streaming media.
- MIME Type
- audio/x-m4r
- video/x-ms-asf
