Online SD2 to M4R, you can put the SD2 to M4R format on your computer, tablet or mobile phone without downloading any software!
Step 1
Upload SD2 file
Select files from your computer, Google Drive, Dropbox, URL or by dragging them on the page.
Step 2
Select 'M4R'
Select output M4R or any other format as the conversion result (click the Convert button)
Step 3
Download your SD2 file
After the conversion you can download your M4R file and upload it to Google Drive, Dropbox.
sd2 : Sound Designer 2 format
SDII (Sound Designer II, sometimes seen abbreviated as SD2) is a monophonic/stereophonic audio file format, originally developed by Digidesign for their Macintosh -based recording/editing products. It is the successor to the original monophonic Sound Designer I audio file format.
M4R - is a digital multimedia container format used to store audio in mono channel mode. This format is suitable for store ringtones and it is widely used by Apple iPhone for its ringtones. Needless to say that M4R and M4A formats shares many similar features.