Bounce your song with no equalization or limiter/compressor in the mix track, and take care about any saturation. Don' t worry about the level: I will put it at an acceptable level. Format must be lossless 44100/48000 Hz 16/24 bits (WAV, AIFF, FLAC...). Do not send MP3 as they have very poor quality and can not be manipulated. Click here for more information.