I dont know what these guys have smoked and how even some senior guys are depicting is wrong. There is no discussion of forgery in this audio, instead the only thing discussed is recording it.
What I understood is they got hold of the cypher, but cos this was not oficially presented to them, they had to put it on official record.
For that purpose they want the Foreign office to officially read it and then make notes of that meeting, to list it officially as received.
But yeah few media analysts gave suggestion to release it and declare it as conspiracy, when the message there is loud & clear.