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Post by spacedog on Jul 22, 2019 14:28:35 GMT
Hi All! I was trying to create a sequence earlier and I sent predetermined CV levels from the SEQ 16 to both oscillators. The standard VCO seems to keep track of pitch better than the other for some reason. As a result only module is in tune. I attempted to tune the other by adjusting the screws at the back, but in doing so I may have made matters worse. Can anyone recommend a good method of resolving this issue? I have noticed there are 2 screws on the back of 2 osc/d, but I'm unsure whether a screw is for each oscillator or whether both in combination determine a pitch range. Hi @nightowl96, you have stumbled upon a discussion that has been going here for a while. First of all, yes you can calibrate using the screws. Here is a reference page. The two screws on the 2OSC/D are one for each oscillator - the picture in the link will help you. There is also a LOT of discussion here. Rather than repeat any of it here, go and have a read. |
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Post by spacedog on Jul 22, 2019 14:51:32 GMT
Hi All! I was trying to create a sequence earlier and I sent predetermined CV levels from the SEQ 16 to both oscillators. The standard VCO seems to keep track of pitch better than the other for some reason. As a result only module is in tune. I attempted to tune the other by adjusting the screws at the back, but in doing so I may have made matters worse. Can anyone recommend a good method of resolving this issue? I have noticed there are 2 screws on the back of 2 osc/d, but I'm unsure whether a screw is for each oscillator or whether both in combination determine a pitch range. As an aside, I note that you were using the SEQ16. I found that once I've got everything where I want it with the oscillator and the pitches on the sequencer, this tracks well. Note that when I connect the SEQ16 CV Out to an oscillator the pitch is pulled down slightly, so I have to re-tune either the oscillator back up or the sequencer - it depends upon how you have set the pitch values. However, once set, the oscillators do track well using the sequencer (i.e. as long as you're staying internal to the modular, all should be OK). Apologies if this is teaching you to suck eggs, but here goes... My way of doing this is to get the oscillator about where I want it then connect the sequencer and connect the reset to the second step - this then just fires the first step constantly. I then use this to tune each pitch in turn. You can then set your sequence length and assign the pitches - and play in real time, safe in the knowledge that you'll be in tune with yourself and that the pitches are already pre-dropped, so to speak. Be aware that if you then try to do anything extra with the pitch CV (e.g some modulation), you will drop it further, then you have to pitch it back up on the oscillator. Without going too far, you can do some funky sequencer things by triggering it from the TRIQ164, noting that each step can be made to do multiple triggers by holding down the track button, then each step can be made to re-trigger. You can get get some great patterns going and you can ratchet any note then, rather than just the ACC note. Have fun  |
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Deleted
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Post by Deleted on Jul 22, 2019 15:01:34 GMT
Thanks for the tip spacedog! Yes the pitch tracking isn't an issue when using just one oscillator, but when sending the CV outputs from the SEQ16 to two different oscillators it then becomes problematic. I've been trying to set reference levels at C0, C2 and C4. The problem is my MIDI controller (korg trinity) doesn't go down to C0, so I've been having to work from C1 which is probably isn't accurate enough since it doesn't correspond to 1V. |
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Post by spacedog on Jul 22, 2019 15:57:23 GMT
Thanks for the tip spacedog ! Yes the pitch tracking isn't an issue when using just one oscillator, but when sending the CV outputs from the SEQ16 to two different oscillators it then becomes problematic. I've been trying to set reference levels at C0, C2 and C4. The problem is my MIDI controller (korg trinity) doesn't go down to C0, so I've been having to work from C1 which is probably isn't accurate enough since it doesn't correspond to 1V. You may have seen it, but this post from robertlanger may be of interest with regard to the C0/C1 discussion and 0V. If you're using a MULT to distribute the pitch CV to two oscillator inputs, you may be suffering from the voltage pull-down that I mentioned and it may well vary across each oscillator in that setup. None of the outputs are buffered, so you can't rely on the voltage staying the same when it hits an input (I am happy to be corrected if I've got that wrong). For example, I have tried creating an octave switch using a 3VCSWITCH and 1V out of the 2ATT/MIX, added to the pitch CV out of the SEQ16 using the the 4ATT/MIX (in DC mode). It didn't really work that well as the voltage was being pulled all over the place - and what I really needed was a Precision Adder It all works great for an LFO CV (I've done that), for example, but not when you're dealing with pitch CV. As you'll spot from the various threads, these aren't complaints so much as understanding the limits of the way this system is built. There's much you can do (and do very well), and building on that is where people go. I have found ways around almost everything that didn't work as I expected and I can get some decent sequencing out of the beast. |
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Post by robertlanger on Jul 22, 2019 18:54:47 GMT
As spacedog pointed out very well, there are no input buffers for CV at the VCO inputs - a remnant from the early days where AE modular was planned as a modular noise machine, not as a full fledged modular. Just as a reminder for those who came later onboard ;-) The 2OSC/d has a CV buffer; and I will make also a precision adder for CV's too, with buffered multiple outputs. So I hope this sensitive area gains significantly in quality. @crypticvaves: The tracking adjust potentiometers that are acessible at the back on 2OSC/d are left->first/upper oscillator, right->second/bottom oscillator. |
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Post by spacedog on Jul 22, 2019 19:43:50 GMT
[...] The 2OSC/d has a CV buffer; and I will make also a precision adder for CV's too, with buffered multiple outputs. So I hope this sensitive area gains significantly in quality. [...] Oooo, exciting. I don't think that I knew that about the 2OSC/d, which makes it even more exciting that I ordered one
The Precision Adder will be a great addition (quite literally), although we can obvously wait so all in good time as there are lots of things for you to work on. |
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pol
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Post by pol on Jul 24, 2019 21:09:32 GMT
As spacedog pointed out very well, there are no input buffers for CV at the VCO inputs - a remnant from the early days where AE modular was planned as a modular noise machine, not as a full fledged modular. Just as a reminder for those who came later onboard ;-) The 2OSC/d has a CV buffer; and I will make also a precision adder for CV's too, with buffered multiple outputs. So I hope this sensitive area gains significantly in quality. @crypticvaves: The tracking adjust potentiometers that are acessible at the back on 2OSC/d are left->first/upper oscillator, right->second/bottom oscillator. Mine seems to track pretty well, but then I just tend to go with what it sounds like with everything else, rather than actually check tuning... One of the fun bits you have to get your head around with the AE Modular is it isn't a 64, 32, 16, 8, 4' Step in pitch for the oscillators as a basis for the modulation, it can be anything! |
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Lugia
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Post by Lugia on Jul 25, 2019 1:43:18 GMT
...which is just fine, actually. My Digisound 80 doesn't offer octave stepping, nor did my ARP 2600. It's not an essential, IMHO. Maybe for those who do need it, though, an octave step offset control might be something to consider adding to the adder so that you can affect all incoming CVs with that control.
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Post by mickosch on Nov 15, 2020 11:53:14 GMT
Hello everybody,
so I did the tuning procedure with my oscillators as well. Since I’m a bassplayer and I have to adjust the intonation on my bassguitar as well, I have an idea from this point of view:
It’s almost impossible to adjust the intonation on a bassguitar for the whole fretboard, so you have to think about where you play most of the time on your fretboard. As a bassplayer you normally play in the lower register (pitchwise). So you’re trying to get the perfect pitch on that part of the fretboard. On the other hand you accept to be a bit out of tune, when you play a fill in on the upper parts of the fretboard.
So shifting that idea to tuning oscillators, it might be a good idea to decide which oscillators you take for lower registers (like basslines) and which ones you want to use for higher registers (like lead voices, melodies). So you try to adjust the intonation/pitch of the oscillators in their specific registers.
Another thing I‘ve noticed is about pitch changing when using my SEQ8. When I use a LFO as a clock and set he tempo of the sequence very slow, so that you stay on each step(pitch) for a while, before going on to the next step, I can hear that the pitch is too flat at the beginning and then the tuning goes up, so that the pitch in the end of each step is too sharp. I‘ve noticed that the pitch change is happening when the GATE LED on the SEQ8 is turning off on each Step. I have no idea what that means, because I have no idea what’s technically going on when you use a square wave of a LFO as a clock for a sequence, but maybe somebody of the forum could have an explanation for the pitch change.
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Post by 101 on Nov 15, 2020 12:04:32 GMT
I've always found a standard tuning fork to be really useful in tuning oscillators. I know that's dreadfully old fashioned but I use it for every instrument I've got.
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