Next module will be a module with at least two LFO's, but which (like the URA) is selfcontained and offer a lot of options when it comes to LFO modulation... the ModBox from SSF/WMD is one candidate, but I want to see what other companies can offer in this department without going crazy with the HP size... I'm still puzzled that the MATHS module need to be that wide.... a waste of HP space in my opinion... but it's a function generator more than an LFO... I know that these function generators with their "rise/fall" parameters can simulate a lot of things, but they do not do a true LFO sinewave which I'd like to have...
I have both a ModBox and Maths. Keep in mind that I've got 144HP of space, so Maths is a fairly large percentage of that, but it's definitely worth it. It's got attenuation for each channel, logic, an offset generator/attenuator/polarizer in the middle. It's also my system's only envelope generator.
The question of Maths's size highlights a trend in eurorack toward micro-everything. Open-source hardware modules like Mutable Instruments's digital stuff, and Ornaments and Crime, get made into smaller kits with more closely-spaced jacks and controls. This is fine, but I enjoy my synth more as a musical instrument when things are spread out a bit. I've had as many as 17 modules in my case. Now, I'm down to 12 because I've got big things like Moskwa, Phonogene, and Maths, that take up a lot of real estate, but are enjoyable to patch and play.
ModBox is one concession I've made to miniaturization, but that's because it's is so good. First off, the LFOs are sync-able, and you can choose whether one, both, or none, are synced. When an LFO is synced, the rate knobs act as dividers/multipliers. So you can have them cycle
n times per trigger, or one time for every
n triggers where
n=1~16. It's great for creating polyrhythms.
ModBox also accurately tracks volt-per-octave for both channels, and runs at audio rates. In other words, it's a decent oscillator. It doesn't have a fine tune control, so it's a bit fiddly to get in tune; but once you do, it tracks very well.
And finally, they threw in a simple sample-and-hold circuit, whose trigger is normaled to once of the oscillators, and whose input is normaled to a noise source. All this, and yet it doesn't feel
too cramped. I'd highly recommend it if you need a pair of LFOs.
See also Klavis Twin Waves. I've never had one, but I've considered it. It's an 8HP dual oscillator that goes to the LFO range, with a bunch of synthesis algorithms.
See also Tetrapad. I'm a huge Tetrapad fan, and I'll have two pretty soon in a separate control skiff. It's a wide 20HP, but it'll function as a quad LFO. The downside is that there's no CV in on the Tetrapad, so you can't modulate rate or anything.
See also Batumi, which is an enormously flexible quad LFO in 10HP. It might very well be the single best LFO module in eurorack. It's one of the few things I'd give up ModBox for if I could find the space. But my system is soon to have 14 potential LFOs, so I'm not exactly hurting in that department.