Surprisingly, the word "audio" for French, is actually "audio". Still, it is pronounced differently.
'un exercice' (audio sample in link)
le lait Audio for the pronunciation here. -> http://www.forvo.com/word/le_lait/
Solennelle (or the masculine 'solennel') is pronounced 'so-lah-nell' in french. (link goes to audio sample)
French "audire" - To hear "sound, especially recorded or transmitted," 1934, abstracted from prefix audio- (in audio-frequency, 1919, etc.), from L. audire "hear" (see audience). First used in Eng. as a prefix 1913; audiophile first attested 1951. http://www.etymonline.com/index.php?term=audio
Brouillard is pronounced something like 'broo-ee-haar'. An audio sample is in link.
Un écureuil (French for squirrel) - The pronounciation resembles somewhat that of 'squirrel' - you can listen to an audio sample by ckicking on the link.
The phrase 'audio quoi de neuf' means What [is] new [in terms of] audio [equipment, etc]. In the word-by-word translation, the noun 'audio' means 'audio equipment, etc'. The pronoun 'quoi' means 'what'. The preposition 'de' means 'from, of'. And the adjective 'neuf' means 'new'.
Andouille is pronounced /ɑ̃.duj/. (Ah-doo-e). Hard to say for English speakers. Link goes to pronounciation audio sample.
The root word of "audio" is "audire," which is Latin for "hear" or "listen."
ecouteurs or casque audio
Audiobook in French is called "livre audio."
Audio, audible/inaudible, auditif/auditive, auditoire, audition, auditorium.