The piece recorded for the project should meet the below specified requirements:
- The music must be recorded as a pure WAV file which quality should be 44.1 kHz / 16 bit or higher.
- The maximum audio signal level should be at -3 dB or a bit less.
- Final mix should be performed with no compressor nor any other additional sound effects.
The piece which do not meet the basic technical requirements may be rejected from the project even just before the final release.