Martinwguy at 23:33, 25 January 2015

2015-01-25T23:33:22Z

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{{Thumb|Delia with keying unit in 1965}}
{{Thumb|Inside view of a keying unit with decay function}}

Delia used a keying unit with decay function to trigger the [[Jason]] oscillators.

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According to the BBC’s own [[Radiophonics in the BBC|Monograph]] in-house publication from January 1963, two keying units were constructed at that time. One would drive seven Advance N1 valve signal generators and the other was rigged up to the 12 Jason oscillators Delia mentions.
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However, Monograph documents the original unit as having 12 keying circuits that would simply switch on the different signal generators and yet could vary the decay time (fade out) for each of these notes. A later, eight-switch version appeared that could alter the attack (rising) aspect of the signal too, as well as the decay.<ref>Bob Dormon's [http://www.theregister.co.uk/Print/2013/11/19/doctor_who_theme_elements_examined/ ''Delia and the Doctor: How to cook up a tune for a Time Lord: Making music from broadcast test equipment the Radiophonic Workshop way'']</ref>
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=References=
<references/>

[[Category:Equipment]]

Keying Unit - Revision history

Martinwguy at 23:33, 25 January 2015