Hello, your Garage Band video editing project sounds exciting! I understand that your project requires the combining of your audio, with a music track. The music track's volume would fade louder and quieter at specific moments in the audio. I have over 10 years experience using Garage Band, and have mixed and edited sound designs for dozens of projects using Garage Band. Radio Plays, Music Production, Voice-over, etc. I am new to Freelancer, but not new to this type of project.
I will utilize Garage Band to import your audio files, and also import the music files you wish me to edit.
I will Master each audio file, ensuring professional levels and fidelity.
It would then be a matter of syncing the audio at specific moments the music is needed, and creating fade curves and keyframes at the proper times. this would ensure that the music is in the exact right place when it is faded in and out.
I will Mix the tracks together and provide a final Mastering process to the entire piece.
Exporting the file would be no problem, and i could provide the finished product in any format you wish. (.WAV, .AIFF, MP3, etc)
Time spent on this project will depend entirely upon the length of the audio, and the numbers of cues necessary, but i would estimate between 5-20 hours, at $20 per hour, totaling $100-$400, with a turnaround time of 3 days.
I invite you to contact me regarding this project.