bruce Posted September 13, 2007 Share Posted September 13, 2007 Has anyone come across a budget "silence detection unit"? It's a unit which basically has 2 inputs, one output (stereo) and some associated logic, and will normally feed input 1 to the output, but if it detects "silence" at input 1, will send input 2. Typically used to switch in a "backup" recorded track if the main input signal should fail. There's the Sonifex RB-SD1 which does exactly this, and does it very well, but costs just under 400 pounds. Has anyone come across any other devices which have similar functionality? Link to comment Share on other sites More sharing options...
Dmills Posted September 13, 2007 Share Posted September 13, 2007 Have you tried Radio Design Labs? Also, Alice used to do one, I don't know if they still do. Regards, Dan. Link to comment Share on other sites More sharing options...
Peter F Posted September 13, 2007 Share Posted September 13, 2007 How about a gate set in ducking mode with very long release? Normal tx ducks backup tx. Drawmer err forgotten the model number might do the job. DS201 rings a bell but I might be completely wrong. Pete Link to comment Share on other sites More sharing options...
bruce Posted September 13, 2007 Author Share Posted September 13, 2007 I'd thought about a gated or ducking mixer. Just looking at all the options. The RDL units look interesting - in particular the ST-ACR2 Line-Level Controlled Relay - 5 to 50 s Delay which lists at about 90 dollars... Link to comment Share on other sites More sharing options...
Dmills Posted September 13, 2007 Share Posted September 13, 2007 Canford carry the RDL stuff. Regards, Dan. Link to comment Share on other sites More sharing options...
bruce Posted September 13, 2007 Author Share Posted September 13, 2007 So they do...68 pounds. It's a pity that the output is just a DPDT relay - if it were 2 such relays it'd be ideal for my purpose - as it stands it'll make either a single balanced switch or a dual unbalanced.... very interesting, thanks. Link to comment Share on other sites More sharing options...
J Pearce Posted September 13, 2007 Share Posted September 13, 2007 You could use that relay to drive 2 other relays. Link to comment Share on other sites More sharing options...
bruce Posted September 13, 2007 Author Share Posted September 13, 2007 You could use that relay to drive 2 other relays. Yes - in fact there's a "slave" logic output which could be used for that very task. Link to comment Share on other sites More sharing options...
Jivemaster Posted September 14, 2007 Share Posted September 14, 2007 http://www.blitzfamily.eclipse.co.uk/tech_...echtip/art1.htm Paul and Nigel from Winchester hospital radio have designed all sorts of useful little circuits. Also Partridge audio in Benfleet make all sorts of stuff like this. Link to comment Share on other sites More sharing options...
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