Help me identify this noise

[samwest]

On cold starts my b6 A4 is making this whistling noise, im thinking it might be a vacuum link because when I step on it going through gears there's a quiet noise that comes from the engine that shouldn't be there I don't know how to explain it it sounds like your squeezing a rubber duck

[samwest]

On cold starts my b6 A4 is making this whistling noise, im thinking it might be a vacuum link because when I step on it going through gears there's a quiet noise that comes from the engine that shouldn't be there I don't know how to explain it it sounds like your squeezing a rubber duck

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