Try Reverb. And don't forget the Korg SQ-1.
https://reverb.com/marketplace?query=ARP%20Odyssey
I'm actually not going to get the SQ-1 anymore because I found a huge flaw in it.....you can't transpose the sequence playing via keyboard. That's not very practical.
Then how do you transpose a sequence on it live?
LOL you don't. You simply just need to change the tuning of the oscillators of the external synth. LOL
Exactly, it's hard to believe Korg haven't implemented this functionality in an update. It's just about useless imo, unless you want to get creative with transposing the MIDI via some program in between. Not a hobby of mine.
I was a bit surprised by Sacred Synthesis comment there, "don't forget the SQ-1", I didn't think you were the "sequencer-type"... and there must surely be better controllers for the 2600.
What I was saying about the Hydra was mostly what it could offer to the 2600, like velocity and aftertouch, to add musical expression. Expression is of course possible without the use of aftertouch or velocity, but they sure can make an instrument more expressive.
The added benefit of being able to route other modulations, and attenuate those pre-2600, was just mentioned for the added programability, in case one "runs out" of something on the 2600. Like a toolbox. A keyboard is also merely a tool to control the actual synth in the first place, aftertouch and velocity just adds another dimension of control... I don't think I would dub a synth "the perfect (mono) synth" if it lacked the possibility to be controlled by aftertouch and velocity. But it's possible with the 2600, though the options of a controller that can supply these CVs seem limited, and sometimes expensive. And the Hydra isn't THAT pricy, considering what you get, you'd simply pay a couple of hundred extra compared to the other CV options for velocity and AT, and as a bonus you'd get the Hydras own synthesis, as well as a poly-AT keyboard (great for P'08, Rev2, and other poly-AT compatible instruments), and a ribbon controller. But if someone knows a cheap alternative to get velocity and expression from MIDI to CV out, with attenuators, I'm interested, I haven't found anything as priceworthy as the Hydrasynth yet.
It doesn't have a sequencer, but at least it has an arpeggiator, and ie you could actually even transpose the patterns
EDIT, I just checked some more, and the Hydrasynths 5 LFOs can be used as independent sequencers with up to 64 steps each, and transposable of course...
What I'm saying is, I'm looking to add velocity and AT by CV to the 2600, and the most priceworthy option I've found yet is the Hydrasynth, and it ticks an awful lot of other boxes as well. It could be my absolute favourite digital synth, both in concept, as well as having lovely character(s) and lots of functionality. I guess I'm basically just trying to sell myself a Hydra here
please talk me out of it!