I have converted some ATRAC files to .mp3. (These are of a radio show I record every week, that I end up saving with Sonic Stage as .mp3 CD disks. This has worked normally for a long time.)
I discovered the audio level on the ATRAC files and consequently the .mp3 files was low. I successfully used "Sony Sound Forge Audio Studio 9" to "normalize" the audio level, and raise it.
I proceeded on to import the resulting .mp3 files to Sonic Stage, but got the error message "X Cannot find music files that are not registered to SonicStage. (Error Code: 00007180)"
This means the .mp3 files without the increase in audio level will transfer OK, but not the ones I edited with "Sony Sound Forge Audio Studio."
What should I do to proceed with this?