23 May 1951 TO VIA FROM SUBJECT SIECIA LOSCOPIC DEVICE Reference is made to your informal memorandum of 14 May 1951,, and at,tached docwients concerni.ng a neri type of oscilloscopic device with extremly high fidelity tape recorder6 2 the writer feel that such a device may be of con- siderable interest both to general I & SO work and to special Bluebird interests. It is also'felt that it may be of value to agency field units* it is t e reqtiested that arrangements be made as soon as possible f or4 and th writer to examine and test this machine lc,cally if one is ava ble or if not obtain from h ctu 2 t@- . 2 rer complete 69"i @o @.L ,he operational and technical details for our study* opinion that this equipment will be qui.te bulky an very expensive and thorough investigation should be made before committing ourselves to purchase. For your consideration and based upon the meager 2information filrrished us coricerni.ng the oscil-loseopic device,, we have set out below several poss@ible (and valuable) uses to wlich the device could be employed if found to be practical and operationally sound: la It could be used for very high level identification* 2& It could be possibly used for testing identification under S*Io 39 It possi1bly could be used on a large scale as a security check using given code words or phrases, Bluebird is always interested in very high fidelity tape or other type recordbrs. 5. It may possibl-y be of extreme value in determining key sounds or key words made by human voice in S,I, techniques.