Is it possible to sequence a Yamaha CS15 using the A4s CV control? 
Kind regards,
Technically retarded person.
It looks like a YES answer
Looks like itās all set, but Yamaha tends to us Hertz/Octave instead of Volt/Octave.
BTW just in case you dont have it, manual is online here (has set up instructions):
https://archive.org/details/synthmanual-yamaha-cs-15-owners-manual
I see that thereās an in for VCO 1 and then another one for VCO 2. Does that mean that I can only sequence one of the oscillators and not both of them at the same time? Like, if I have a patch with two oscillators and the other one is detuned for a nice, fat sound, what I will hear from sequencing from the A4 is only one oscillator, meaning the patch is destroyed?
Hmhā¦!
I would expect there is a setting in the synth (check the manual) - but if not use a headphone splitter to duplicate the cv signal.
Are you able (and will the CS15 do this), to āsyncā osc 2 on the Yamaha to osc 1? If so, then the A4 triggering Yamaha should by triggering osc 1 on Yamaha, since itās syncād or āslavedā (again, if the CS15 lets you), then your detuned osc 1/2 should be heard when A4 Trigs it. As someone mentioned, the early Korg/Roland/Yamaha analogs used the Hz/Oct and S-Trigā¦it all gets weird with Gate In/Outā¦so experiment. The Yamaha manual will definitely be more informative than the A4 manual is on this topic, and then thereās been a recent update I have not done yet concerning ALL the config of CV.
Back to the monsterā¦finally am digging A4 but since I use all hardware keys and rack modules and record audio into DAW, I have great anticipation for overbridge.
Use a Y cable from CV A/B and configure both CVA and CVB to to type pitch. I havenāt tried this myself, but it seems logical (I knowā¦).
From the CS15 Manual, Pg 8.-āTuning of VCO 1 must be made at the VCO 1 Output. The Pitch OF VCO 2 is changed by Detune.ā
Pg. 20 of CS15 Manual -āUse of TWO SYSTEMSāā¦that and whatever it takes to match that on the A4, all set with some experimenting.
Hi Dawid,
Iād be interested to know if you succeeded, as I should be receiving a CS30 soon. And it should also have some mods for CV input of the VCFs, so I would like to do something similar with my A4.
Of course the CS30 has itās own sequencer but I dont think it has p-locks 
Iām planning to buy the synth when I go to Tokyo this summer. So it will be some time, unfortunately!
Thank you all for your replies! Really helpful.
fwiw, it works with the cs15ās little brother : the CS10.
Hi!! Iām having some issues to connect Analog Keys to Yamaha Cs15 via CV. I have 2 Y cables, from each Cv output to trigger/cv input from the Yamahaā¦Iāve set it up to Hz/V but stil canāt trigger both oscillators from Yamaha. And I also can listen to AK oscilattor itselfā¦have you got experience with this equipment (or similar, like MS20), connecting them successfully? Am i missing something in the set up?
Thanks!!
Did you set a trig?
also discussed here ā¦
use the search ! 
Iām not sure what do you mean by setting a trig, for sure Iām missing some informationā¦I went to CV configuration pages, set polarity, hz/v, etcā¦played keys on AK and also tried by entering trigā¦does it answer your question?
@avantronica Iāve used the search, but the results didnāt help me to solve my issues, still cannot connect them and make them work successfuly
thatās no reason to create an extra thread though, keep it tidy - youāll actually be bumping the target audience you seek if you develop an existing thread as per the guidelines
Ok, It wasnāt my intention to make it untidy, my apologies.
Besides that, do you know what I am missing configuring the AK? Why do I hear AK oscillator when CV track is selected? Cable Y 1 has to be connected/set up to Trig1/CV1 or it can be Cable 1 Trig1/Trig 2 and Cable 2 CV1/CV2? Thanks!
@Dawidā¦I know itās been a long time since you posted this butā¦ were you able to set it up successfully? If so, would you mind telling me how you set it up? configurations, etc? Thanks!