guitar noise comfortably numb

how is the sweeping noise at the beginning of Comfortably Numb by Pink Floyd?

you can hear the sound of many Pink Floyd songs im pretty sure its some kind of slide guitar, but I dont know what the tuning is

You must be a glissando sounds. These are synthesized sounds, and is common in many synthesizer sound banks.

NOT – Comfortably Numb – Pink Floyd Tribute by Signal to Noise

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