Does anyone know an internet site where i can rent
sound recording equipment? even if it's just minidisc.
I'm just sick of trying to remove camera buzzing from everything.

pretty much any external mic will cut out the camera motor noise. You could spend as little as about £30 at Jessops and get a cheap external mic for a camcorder. That'll do it if motor noise is your main consideration. better to spend a bit more though and get somethign more worthwhile.

Alternatively, rather than a minidisc. A bundle of MP3 players have record ability. you might already have one.

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