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Panning recipe request


#1

This will very very easy for most of you ER-301 wizards. I’m looking for a clean recipe for stereo panning. Ideally it would be a custom unit that would take two inputs for gradual hard/soft panning (square to sine I guess) and a pulse that decides the speed of switching from left to right.
I did some experiments with sample and hold and different oscillators but it is a little unreliable. Anyone up for the challenge? (even though this is probably too easy to call it that… :thinking:)


#2

How about putting a Slew Limiter unit after your gate signal? That would give you square to triangle.
Oh, and sine to square (and back) can be achieved with a Limiter unit.


#3

Will give it a try, thanks. I already got a little closer by putting my question to words by the way :slight_smile: Will post back when I get a satisfying result.


#4

I let this little project rest for a while and came back to it today and still didn’t manage to get the utilities together. One thing I’m still looking for is a way to produce an alternating high/low voltage on a pulse count. So: high voltage on even pulses and low voltage on odd pulses. I seem to need this little device in any clockable scenario I come up with and fail to find a solution for it!

Side note: are the two limiter values not assignable…? I was surprised not to find the usual menu on those faders to hook them up to custom unit controls or incoming CV’s. Am I missing something here?


#5

How about:

Custom unit with controls A and B

Within… on main chain, a VCA.

On the VCA’s panning subchain (set gain to 2), add:

Tap Tempo (set tap to local control A), then offset -.5, then slew limiter (default it at 3ms) and have the subchain of that your B control.

You’ll have to tweak the B gain to taste but basically sending a clock to control A gives your pan speed and increasing CV to B will give you a smoother pan shape.

The Tap tempo is providing the clocking and also generating the Square shape based on it’s output. Adding the Slew to this give it a more sin shape depending on how high in ms you push it. Careful, If you push it too far the waveform will fall apart!


#6

So cool it actually works :grinning:

I’m pretty hopeless honestly cause I just carried out the instructions without having a clue what I was doing. That’s why I can’t cook this stuff up myself! What can I say, love this forum. Thanks @NeilParfitt!!!

I hope I can finish my initial idea with this unit and then I’ll post the entire chain back.


#7

Actually I’m not sure it works as intended :thinking: it seems the length of the gate is still depending upon the width parameter of the tap tempo instead of the even/odd pulse like I really wanted… It’s more something like a gate with slew control. Also useful though. I would post my unit but I’m away from my laptop right now.
Seems like I’ll have to save this for later again.


#8

Here you go, not ideal because the ‘hard’ is softer the slower the clock*, but at higher rates it works well. This will be resolved when the Limiter parameters are modulatable which I am sure will come along sometime soon :slight_smile:

Enjoy!

ClockPan.lua (7.3 KB)

  • edit: although if you ramp the HardSoft control all the way up to 5 it gets fairly sharp. You might like to try fiddling with the gain staging if you need harder shifts.

  • edit 2: I forgot to say if you want the panning to be every other clock pulse so pulse 1 is left, pulse 2 is right, change the div setting to 2 in the Pulse to Hz unit. Or every 3 or 4 etc… :wink:

  • edit 3: Sometimes, I’d forget my head if it wasn’t attached :joy: it still works but the gain staging on f0 is not right because of this issue:


#9

Hello @kel I just tried your unit! Works really well, and the fact that it’s not a super-sharp square wave is not too bad in a panning scenario I think. The pulse to Hertz sub-unit was definitely not on my radar and this custom unit really shows an excellent use case for it, so I’m happy to have learned from it. Thanks!!

When I have some time I will attempt to use this unit in a multiple clock division ping-pong delay sort of patch. That will require some more head-scratching probably.


#10

Excellent, though you would like it, I agree about the non too sharp angles being okay in this scenario, but I do look forward to having 100% control over this with the inevitable cv control of the limiter parameters.

There are actually a few different topologies you could experiment with this unit based on the other suggestions above, I might create those as custom units as well if no one else works them out :wink: