Weird LSB CCs and static-y pops when recording knob tweaks.

[tommyecho]

Hi everyone,

Thanks in advance to anyone reading this. Not the most stimulating subject. . . I called moog tech support, but they didn't really have an answer for me. . .

I am doing some automation of knob tweaks in a midi clip in ableton with my voyager, and I am noticing some strange behavior of the LSB CCs. They tend to jump up and down in a ramp-like fashion, and the ramp restarts several times as I turn the knob from full 0 to 100%. I have included a pic of what the automation envelope looks like for CC 51 when I turn the cutoff knob from 20Hz to 12K once, with varying speeds. You can see that, when I turn the knob a little faster, the pattern happens so quickly that the peaks and valleys become a blur. CC 19, the MSB CC for cutoff, behaves totally normally, making a smooth automation line. This is the way that all LSB CCs are acting in my voyager. Is this the way this is supposed to be? I tried searching similar posts, but nothing really addressed this, as far as I could find.

The reason why I was wondering is because I am hearing a lot of little static-y pops in the audio from my voyager as I turn the knobs with midi out being recorded. This doesn't happen when I detach the midi out cable. I don't think the little pops are the "zipper effect" I have read about on other threads. Any thoughts about what is causing this?

[RL]

Are all local controls off?

[tommyecho]

Are all local controls off?

Yes, they are off, but, if I turn them on, I don't notice any difference in behavior, for better or worse. . .

[RL]

OK, is it the same behavior when you connect one MIDI cable from the MIDI out of the Voyager to the MIDI in of the Voyager?

[tommyecho]

Totally different behavior, RL. There are no pops or static when i run a single midi cable from the voyager's midi out to it's in. Just a really clean zipper effect. Now that I've heard the zipper effect, I noticed that, if I turn local control on while doing midi recording in ableton, i get the zipper effect (in addition to the little pops). When I turn local control off, I hear a smooth sweep. Am I correct in observing this? Now at least I understand the sound of the zipper effect that you and some other folks were discussing in another thread.

Thanks for the help, RL. So far, the static and pops are still there. . .

[RL]

Hmmm, then it seems that Ableton sends some weird stuff to the Voyager I guess.
I don't have any experience in Ableton, sorry.
Have fun,
Rudi

[tommyecho]

Since I kind of posted 2 issues here, can you clarify for me that the LSB is not supposed to look like it does in the picture? Thanks again, RL.

tom

[Tidda]

The LSB is supposed to look that way.
Think of it as a 2 digit number, the left digit being the most significant digit because when it is increased the value of the number is increased by 10 instead of only 1 when the right (least significant) digit is increased.
When you go through the sequence of numbers from 0 to 99, you will notice the most significant digit goes smoothly from 0 to 9 and the least significant digit has the ramp like behaviour.

Tidda

[tommyecho]

The LSB is supposed to look that way.
Think of it as a 2 digit number, the left digit being the most significant digit because when it is increased the value of the number is increased by 10 instead of only 1 when the right (least significant) digit is increased.
When you go through the sequence of numbers from 0 to 99, you will notice the most significant digit goes smoothly from 0 to 9 and the least significant digit has the ramp like behaviour.

Tidda

Thanks, Tidda. I feel better knowing that the LSB is normal. . .

Tom