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What CV value is exactly 1 octave and how do i generate it
Posted: 08 Aug 2018
by electrofux
I have this sequencer where i want to add or deduct 1,2,3 octaves to the current sequence.
I have connected the 8 steps to a RVL-1 to monitor the notes of the 8 steps and when i start adding +- CV values to the steps, the notes increase/decrease. BUT i cant find a single value which adds an octave to all notes. I was getting as far as 7 notes being an octave higher but one lagging a note behind and i am into the third digit behind the comma with the value i add/deduct. Adding another 0.001 led to another note being too high.
It seems i need even finer values or i am doing it totally wrong.
Anyone got an idea how to do this properly?
Re: What CV value is exactly 1 octave and how do i generate it
Posted: 08 Aug 2018
by selig
electrofux wrote: ↑08 Aug 2018
I have this sequencer where i want to add or deduct 1,2,3 octaves to the current sequence.
I have connected the 8 steps to a RVL-1 to monitor the notes of the 8 steps and when i start adding +- CV values to the steps, the notes increase/decrease. BUT i cant find a single value which adds an octave to all notes. I was getting as far as 7 notes being an octave higher but one lagging a note behind and i am into the third digit behind the comma with the value i add/deduct. Adding another 0.001 led to another note being too high.
It seems i need even finer values or i am doing it totally wrong.
Anyone got an idea how to do this properly?
Which sequencer? Standard note CV is one note (semitone) per "value", with 60 = middle C and 72 being an octave above (+12) and 48 an octave below (-12). So if you pass the Note CV from Matrix through Thor and add 12 with a Rotary, you'll transpose the sequence up one octave.
BUT, there are some things to look out for. For example, if you use Thor to generate CV, by sending the MIDI Key Note out a CV, it won't quite line up correctly unless you set the output to 88 and scale it by 98 with a Rotary set to 123!
Re: What CV value is exactly 1 octave and how do i generate it
Posted: 08 Aug 2018
by electrofux
The note value is coming from a ModPanel 16 Fader and goes through a Polymodular Merger (where the addition of the octave is supposed to occur).
Edit:Ok, i think i solved it. It is the point where i add the octave cv value. When i use a Thor Rotary everything is fine, when using a CV8x4 with a value of 12 it isnt. Also generating a value with Parametrix or the RVL-1 Constant Value doesnt work either. Thor it is, like so often
Re: What CV value is exactly 1 octave and how do i generate it
Posted: 09 Aug 2018
by Carly(Poohbear)
electrofux wrote: ↑08 Aug 2018
when using a CV8x4 with a value of 12
Note on the CV8x4, 12 is not really 12, it covers the range from about 0.0907 to 0.098
using the shift on the knob you can get this sort of range
0.0907
0.0916
0.0925
0.0934
0.0943
0.0962
0.0971
0.098
From Thor Rotary @12 = 0.09449
if you really need the CV8x4 12 to equal 0.09449, create an automation lane for the knob and set it to 12 in there.
Re: What CV value is exactly 1 octave and how do i generate it
Posted: 09 Aug 2018
by electrofux
Carly(Poohbear) wrote: ↑09 Aug 2018
if you really need the CV8x4 12 to equal 0.09449, create an automation lane for the knob and set it to 12 in there.
Wow, i didnt know that. Thx.