Hi guys 
Well I’m building my AS3340 PCB and I couldn’t find any 360k resistors but this chip needs it somehow. At least that’s what the datasheet says. But I already noticed on some schematics it isn’t there? So I just wanted to ask you if someone know if this 360k resistor connected between pin 2 of the as3340 and the VCC is needed.
OK, that’s pin 17, had to look for a while to find that 360K resistor…
It is used to bias the pitch control voltage towards +15V so the CV inputs have a more usual range.
So a close enough value will be OK.
330K or 390K will certainly do.
Breadboard first 
Or at least, make a provision for putting two resistors in series on the PCB if you ever need it.
330K + 33K = 363K, and that’s close enough (well below the 5% tolerance of resistors when the 3340 was designed)
This is a nice way of doing it :
Think of it as another CV, but a fixed one. And 360k instead of 100k to scale down the effect of it; roughly it’s like a +5 V CV with a 100k resistor. Without it everything works, but (about) 5 octaves lower.
Some people like to have oscillators that use 0 V for the lowest note they play (and then feed in only positive CV for higher notes), some like 0 V for about middle C (and then use negative CV when they want lower notes). This +15 V and 360k gets you the latter.
Oh yeah pin 17 I’m sorry!!
Thank you for the explanation, it makes more sense now
Well okay I’ll try the two resistors in series,… But I have to find new resistors 
So if I want 0V as the lowest note I can remove it? Because my Midi to CV module starts at 0V for the lowest midi note
Sure, you can always add it in later if you decide you want it… easier than removing it if you decide you don’t. (Also, many MIDI-CV circuits allow you to choose which behavior they do.)
Okay okay
As long as the 1V per octave is still there then it’s okay
I’ll look at it later then thanks the the tip
So if I want 0V as the lowest note I can remove it?
Define “lowest note”. The standard 3340 config outputs ~1 Hz with no CV in, which isn’t very useful if you plan to listen to the output. 
See here:
The 360k resistor shifts this a few octaves up, into a somewhat more useful range.
Note the datasheet circuit is for 15 V; if you’re using 12 V supplies you need to adjust this (and a few other values). But it’s probably easier to use a coarse tune potentiometer as one CV input, so you can dial in 0V to your liking, as it’s done in the simple 1V/Oct oscillator (and many others):
I couldn’t find any 360k resistors
36 is a standard E24 (5%) value, so shouldn’t be that hard to find (see e.g. tayda) 
Wow nice so much information!
Thank you a lot, I think it would be better to use a resistor then but the better I could find was a 380k ohm from a PCB I found on the road 
Well I will try this resistor later thanks to everyone 
