Polyphatty building plans & questions

hi all

since i love my LP for live playing&recording, i was hoping that there’d be a polyphatty or something like it to be introduced at NAMM2012..

sadly, there wasn’t, so I am thinking about doing this by myself, since there’s the option of polychainig SP…

What I like to build is a portable 4 or 6 (if i can afford it) voice superphatty with a doepfer 61 keys masterkeyboard, an integrated line mixer with FX send (Lexicon MX220) and a mastercompressor (Really nice Compressor with Sidechain input from our drummers bd-mic).

My questions:

  • what do u think of it, will it be worth the price and sound as unique and thick as I think?
  • has anyone done this or something similar yet? (live or studio)
  • On Oberheim OBX i.e., there are outputs for each voice and I love this possibility, with this project I’ll have the same possibility, but is there any possibility that I can change the Cutoff/Waveform of a single SlimPhattys in poly mode while all other parameters are controlled by the main SP?


    cheers
    christoph

Hey Christoph,

I currently poly chain a Little Phatty Stage II with 2 Slim Phattys.

Firstly I’d like to say it sounds like an awesome project!

The moog chords are very thick and nice as you’d expect and I think the larger keyboard is an awesome idea seeing as you’re running more voices than in my setup. Another benefit I’ve found is running my 3 units ‘stacked’ on the press of one note (simple midi controlling from the LP through both SP’s) - you can get 6 oscillators (or more in your case) all going on the one patch for extra phatness or make some cool modular sounding stuff by running seperate patches on each unit and tweaking knobs - I like making drones by putting a dummy patch cable into each phatty’s gate input and just tweaking knobs while the units are ‘stacked’ with different patches.

…is there any possibility that I can change the Cutoff/Waveform of a single SlimPhattys in poly mode while all other parameters are controlled by the main SP?

Yes! My setup currently operates in this manner (I haven’t experimented with changing it - if that’s possible - because it suits me how it is). If you tweak anything on the LP (including changing patch and volume), all 3 units will respond and change simultaneously. If you tweak anything on either of the SP’s (including changing patch and volume), only that unit will change. The only limitation I find is if you want to change something on only the LP, especially after you’ve tweaked the other SP’s (for example tweaking the filter cutoff on the LP after previously changing the filter cutoff on one of the SP’s will cause the SP’s cutoff to suddenly jump to the LP’s cutoff position). I know you can turn off the volume CC in the midi menu so that the LP’s volume will only apply to it’s own unit (however I find it handy to control the volume of all units for playing standard patch-sharing polyphony). I also think you should be able to even make the master unit (in my case the LP) seperately controlled also (but I’m not 100% sure and haven’t tried).

One cool thing to note is that you can send patches through the midi cable chain between units without the need for a computer - so say you muck around on the first unit and make a cool patch - you can send that (or all patches) directly to the other units in the menu.

EDIT — I have since experimented, and you CAN have the first Phatty (master unit) seperately controlled from the other units - both in terms of changing patches and tweaking knobs on the fly.

I hope this helps!

Regards,
David Smyth
NZ