Typically the filter runs asymmetrical. The top end being +11v'ish and the lower end around -4v. I guess with some careful biasing<span></span> it could be done. <div>It also depends if the voltage inverter that Olivier uses has enough current to drive the -ve rail. <br>
<div><br>On Wednesday, March 6, 2013, Marc Nostromo [M-.-n]  wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">usual shruti's got -9/+9..<br>
<br>
so that would make 18v. Or is there something I didn't understand ?<br>
<br>
Here's the current schematic:<br>
<br>
<a href="http://mutable-instruments.net/forum/uploads/FileUpload/d4/c6e37ec94c97274da8dfc001e8d34a.png" target="_blank">http://mutable-instruments.net/forum/uploads/FileUpload/d4/c6e37ec94c97274da8dfc001e8d34a.png</a><br>

<br>
Seems like they use the usual filter regulors.<br>
<br>
( I thought I had copied the thread link on my first mail but it seems<br>
it wasn't)<br>
<br>
/M<br>
<br>
2013/3/6 Paul Maddox <<a href="javascript:;" onclick="_e(event, 'cvml', 'yo@vacoloco.net')">yo@vacoloco.net</a>>:<br>
> I'll be interested to see how they "fit" the ladder in 12V (it needs<br>
> more than 12V end to end)..<br>
><br>
> Paul<br>
><br>
><br>
> On 6 March 2013 16:56, Marc Nostromo [M-.-n] <<a href="javascript:;" onclick="_e(event, 'cvml', 'marc.nostromo@gmail.com')">marc.nostromo@gmail.com</a>> wrote:<br>
>> Some people seem to be on the way to roll a new shruti-1 filter board. Nice.<br>
>><br>
>> --<br>
>> <a href="http://marc-nostromo.com" target="_blank">http://marc-nostromo.com</a><br>
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<br>
<br>
<br>
--<br>
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</blockquote></div></div>