Why is audio quality of shared movie poor compared to created project in iMovie?

I created a movie using iMovie (10.04) and the sound was great. The final shared movie file on my hard drive had very poor audio.

Hi
Can You PLEASE tell me (us) what kind of material You used (all of it)
- Video CODEC - not just .mp4 or .wmv etc - BUT open the video file in QuickTime-player then open Instructor [cmd+I] and read
Video format (Codec): nnnnnnnnnnnnnn
Frames per second: YY.yy
What does it say ?
- Audio file formats used: ? (and from where - Audio-CD, iTunes, audio files from SD-card etc)
- Photo file formats used: ? (and from where - folder/camera etc)
Most probably iMovie got a problem in converting to it''s native format.
Else running low on space on the START-UP (Boot) Hard Disk - also gives poor results - I never go less than 25Gb free space when using SD-Video quality and about 4-5 times more if HD-material is used.
Yours Bengt W

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