Very soft brake pedal, engages near floor: Woosh sound when pressing the pedal

[Cursh]

X posting this question from a longer post I made in the BlazUrban forum.

When I hit the brake pedal I hear a loud WOOSHing sound coming from under the dash.

Any idea what that is? The brakes work better than the sound led me to believe that they would, but they are only engaging at the floor.

Original equipment all around: disc front/ drum rear.
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