<p>I was just running a speak n math &amp; a 606 through the input and it was working fine, although it would cut out at certain points on the input dial (although very rarely), I'll reverse the C5 cap tomorrow and see what difference it makes.  I've also tried controlling the trig in with a korg kr-55b drum trig and it works fine also, it was a bit sensitive to the 606 trig out though (it would pick up the muted "off" steps between the "on" steps).  I could also control the tempo with a voice of saturn sequencer clock really well, but not the other way round.  I'll test it's compatability with other machines/synths too.  A possible mod would be a FM or an MG/LFO in jack which could be interesting to patch an MS-10 etc into, also a noise filter might be cool.  I'm very happy with the drone lab, it was very easy to put together and so easy to get the hang of. Not only does it do nice drones, but it can do some interesting noise/feedback &amp; rhythms (which I wasn't expecting).  I do get some intermittent noise when the BPF Balance is all the way up, but nothing I can't deal with.  Excellent work!, now I have to get on with making a case for it, will post pics when I do!
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