Does anyone know what instrument this is?

[interyeti]

Was listening to some old Marvin Gaye session tapes and I'm having trouble identifying the instrument that comes in at around 4 seconds in this clip:

https://soundcloud.com/skhrmny/2a-1

And again at around 7 seconds here:

https://soundcloud.com/skhrmny/1a-1

It sort of sounds like air turbulence so I was thinking it's some sort of wind instrument/flute but I'm not sure what it would be...anyone?

[HHP]

I'm thinking standard electric guitar run through a Wah pedal and maybe another effect as well. Very popular pedal with the Motown session guys.

[interyeti]

It's actually a bamboo flute (I posted this as sort of an experiment). The only effect is a bit of snare drum compression.