How to convert .mp3 audio files to .sda format.
We are not aware of any possible way to convert MP3 Audio Files directly to SDA format (.mp3 to .sda conversion).
There might perhaps be an existing SDA file type, which can be generated from an MP3 audio file, yet we are not aware of such conversion.
Perhaps this was just a typo, and you were, in fact, searching for ways to convert MP3 Audio Files to CD Audio Track Shortcuts (.mp3 to .cda conversion). In such case, please refer to the MP3 to CDA conversion.
In a word, direct mp3 to sda conversion is not possible.
So don't expect any so-called mp3 to sda converter or mp3 to sda free online conversion tool available.
The database currently does not contain any mp3 software converter.