Go to Edit > Preferences > General > Import Settings . Choose Encoder: Set "Import Using" to AAC Encoder .
By default, iTunes downloads music in with an .m4a extension. You can ensure you're getting the best quality (typically 256 kbps ) by checking your preferences. On PC: Go to Edit > Preferences > Downloads . On Mac: Go to Music > Settings > Playback . itunes-m4a-download-blog
If you have existing files in other formats (like CD rips) and want them in .m4a : Go to Edit > Preferences > General > Import Settings
Look for the Cloud icon next to songs or albums; this indicates the item is in your account but not yet on your device. You can ensure you're getting the best quality
Ensure your download format is set to "High Quality" (256kb/s AAC) . If you have Lossless enabled, some files may download in a different container (like .movpkg ), so switching back to "High Quality" ensures you get a standard .m4a file. 2. Downloading Purchased Music