[sdiy] "scanner" or voltage-controlled routing?( vc stage-address)

[Jason Proctor]

IIRC, the Blacet Scanner uses the LM3914 chip. also IIRC, there's a 
trimmer for how much overlap there is between the stages, implying 
that "none" may be an option.



>hey all,
>
>okay, this idea has been a driving force in my modular explorations 
>for a while now:
>
>I want to do a stage-addressable sequencing thing; 0-5v would switch 
>it between stages, which would be x amount of voltage divider 
>outputs, ala a normal sequencer.
>
>I know the Serge TKB, cgs Programmer, Wiard Sequantizer and, in 
>part, the Blacet Scanner and Doepfer a-152 v.addressed switch all 
>have this functionality, but I am considering whether there would be 
>much simpler ways of doing this?
>
>At first my thoughts drifted towards the lm3914 Dot/Bar display 
>driver for LEDs - simply set it to Dot mode and route each of these 
>outputs through the attenuators and out. However I think it was mr. 
>Haible who said that it had notable slew between its stages - the 
>crossfade function also detailed in the datasheet for the lm3914.
>
>Now, would a simple ad-da process be useful to make a stair-case 
>signal that would eliminate this slew?
>
>just throwing some ideas around here :)
>
>best,
>Andreas.
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