Doepfer

> since I've seen the NAMM 2010 video (you remember http://www.sonicstate.com/news/2010/01/22/wnamm10-doepfer-diy-synth-and-more/ ) I always wanted to know if the used filter is also available as an A-100 module. Probably yes, so which is it, please?

We were trying to work the configuration out over at MuffWiggler a while back:

http://www.muffwiggler.com/forum/viewtopic.php?t=13284&start=0&postdays=0&postorder=asc&highlight=

and my best guess would be that it is a state-variable filter built around an LM13700, in which case the nearest module would probably be the triple resonant filter, A-127, but which of course doesn't have the HP output readily available (i.e. you'd need to mod it...).

But I could be completely wrong (it is supposition on my part, based on the photo at their website) - in any case, I expect Dieter will be along to give the true low-down!

Tim

> and my best guess would be that it is a state-variable filter built around an LM13700, in which case the nearest module would probably be the triple resonant filter, A-127, but which of course doesn't have the HP output readily available

But it is really easy to get at, so here are a couple of very simple, manual filter sweeps, at low, medium and high resonance settings, for both square and saw wave inputs:

http://www.timstinchcombe.co.uk/synth/a127_hp_sq.mp3
http://www.timstinchcombe.co.uk/synth/a127_hp_saw.mp3

Tim