Intellijel Quadrax

[Sweetfiltersweep]

Have you tried to clear CV assignments ?

That was it. Thank you. It’s my first day using Quadrax.

[Sweetfiltersweep]

Another question: the manual reads “ When the LINK button is red, channel triggering is normalled to the previous envelope’s TRIG input”. That works, but I noticed that with the chained channels in mode red (AHR), only the first channel has a hold phase with longer gates. The chained channels won’t hold. Is that normal?

[ima_jrk]

Another question: the manual reads “ When the LINK button is red, channel triggering is normalled to the previous envelope’s TRIG input”. That works, but I noticed that with the chained channels in mode red (AHR), only the first channel has a hold phase with longer gates. The chained channels won’t hold. Is that normal?

95% sure this was answered as yes it is normal before as only the trigger event is linked, not the whole gate.

[Sweetfiltersweep]

Another question: the manual reads “ When the LINK button is red, channel triggering is normalled to the previous envelope’s TRIG input”. That works, but I noticed that with the chained channels in mode red (AHR), only the first channel has a hold phase with longer gates. The chained channels won’t hold. Is that normal?

95% sure this was answered as yes it is normal before as only the trigger event is linked, not the whole gate.

Thanks. I guess you would use multiples or stackables to get the whole gate on all channels. Now I am relieved. :-)

Maybe this “whole gate on all linked channels” could be added in a future update.

[tvparcable]

Has anyone else noticed that the EG's attack tends to produce an audible click when it's extremely short? I often use very sharp attacks with exponential curves on VCAs or filters, and while the click can be aesthetically suitable with certain musical environments, sometimes you just want a good old warm analog-style sharp attack. In comparison, my 0-coasts can go as sharp as Quadrax, but never clicks. I was wondering if there's any possibility to have it fixed or if it's just inherent to digital envelopes due to aliasing?

[kisielk]

At it's shortest length the Quadrax attack is literally 0 samples long, so pretty much instant rise. That kind of transient is just going to have a bit of an audible click. The envelopes used to be slightly longer at minimum and didn't click, but people specifically requested them to be faster / able to click so we added that.

[Sweetfiltersweep]

Has anyone else noticed that the EG's attack tends to produce an audible click when it's extremely short? I often use very sharp attacks with exponential curves on VCAs or filters, and while the click can be aesthetically suitable with certain musical environments, sometimes you just want a good old warm analog-style sharp attack. In comparison, my 0-coasts can go as sharp as Quadrax, but never clicks. I was wondering if there's any possibility to have it fixed or if it's just inherent to digital envelopes due to aliasing?

An envelope has theoretically no sound on its own. Take a look at the VCA.
Also this is helpful:


And btw, lots of analog envelopes on classic synths do click like hell whith minimal attack. It’s not a side effect of digital envelopes.

[tvparcable]

At it's shortest length the Quadrax attack is literally 0 samples long, so pretty much instant rise. That kind of transient is just going to have a bit of an audible click. The envelopes used to be slightly longer at minimum and didn't click, but people specifically requested them to be faster / able to click so we added that.

That makes sense, thanks for the quick answer - my feeling was that it's a little difficult to find the sweet spot between "there is a click" and "there is no click but there's kind of an audible tiny fade-in". I just did some further testing comparing the 0-Coast's exponential curve EG (w/ the attack set as CCW as possible) and the Quadrax's, both controlling the same Quad VCA's channel and you can achieve similarly sharp/near-zero attacks without a click, it's just a matter of fine-tuning your attack a little longer on the Quadrax. On certain spots you would get clicks but not on all attacks: does it just depend on the relationship between the waveform's amplitude and the moment the sharp rise hits?

And btw, lots of analog envelopes on classic synths do click like hell whith minimal attack. It’s not a side effect of digital envelopes.

Edit: Thanks for the link btw, the video clarifies a lot of things about pops, very interesting stuff.

[OHEXOH]

On certain spots you would get clicks but not on all attacks: does it just depend on the relationship between the waveform's amplitude and the moment the sharp rise hits?

It does, for consistent sounds you would want to use the same trigger/gate and have that go into the sync input on the oscillator, in effect resetting the wave shape every time.

[Daisuk]

Has anyone made a cheat sheet for this by any chance? I still struggle to remember what all the colors and button combos are.

[exper]

Has anyone made a cheat sheet for this by any chance? I still struggle to remember what all the colors and button combos are.

Here you go:

EDIT: Weird. Links to specific posts aren't working.

Anyway, there's a cheat sheet on page 22 of this thread.

[Daisuk]

Has anyone made a cheat sheet for this by any chance? I still struggle to remember what all the colors and button combos are.

Here you go:

EDIT: Weird. Links to specific posts aren't working.

Anyway, there's a cheat sheet on page 22 of this thread.

Ah, awesome! Thanks a lot.

[tvparcable]

Apologies if this was already discussed, I just can't seem to find this information for some reason: how do you get chained CV to come out of a single output? I have been playing around with chains by using the OR of Cold Mac or a mixer, but is there a way to have everything come out of a single input of the Quadrax, sort of like the way Stages would do it? Example: Trig on CVA, which rises -> CVB outputs a burst triggered by CVA's end of rise -> CVC outputs a fall triggered by CVB's end of fall -> everything comes out of a single output. Is it possible with Quadrax alone?

[Karl_Joseph]

Apologies if this was already discussed, I just can't seem to find this information for some reason: how do you get chained CV to come out of a single output? I have been playing around with chains by using the OR of Cold Mac or a mixer, but is there a way to have everything come out of a single input of the Quadrax, sort of like the way Stages would do it? Example: Trig on CVA, which rises -> CVB outputs a burst triggered by CVA's end of rise -> CVC outputs a fall triggered by CVB's end of fall -> everything comes out of a single output. Is it possible with Quadrax alone?

It doesn’t have a mix output so it won’t output a multistage envelope w/ burst stages. THAT WOULD BE SICK.

The mix output will likely be on the yet to be announced Quadrax mkIIs expander, 1u only.

[exper]

Ha. That’s already out. It’s called the Quadratt.

[studioutopia]

To combine envelopes you don't want to mix them - their voltages would be added - if two overlapped you would go well above 10V and clip everything downstream. What you want is a logic OR - which you can get from Intellijel Plog or the OR module, or in Mutable Kinks, and various other logic modules.
There has been a lot of talk/requests on the Intellijel forum for a 1U OR module... I'd buy that in a minute.
Frap tools Falistri has the Max output, which is exactly this - it overlays one envelope on top of the other when you look at the outputs on Mordax - the "highest output envelope is the one that gets the output". To do that with the 4 outputs of Quadrax would be sick!
However - just mixing two envelopes with Quadratt (or any other DC-coupled mixer) would allow you to approximate an ADSR. The envelope with only Trig is the AD, the other envelope needs to have an attack that will combine well with the AD stage, and sustain enabled (red), and it handles the final Release. The level on the mix of Envelope 1 becomes the sustain level.

Regarding the Rise mode "Red" only passing the Trig of the previous envelope - woithout this you cannot build an ADSR. I really would like to have the option of passing one channels gate the the next without using a stackable/mult for creating parallel envelopes - but we can't lose the functionality of the current mode of operation.

[cinnatoastg]

What you want is a logic OR

I was thinking about this using switches and EOF triggers from the expander as opposed to logic. Set up all envelopes to taste as individual stages, route the output of each to a sequential switch, set the envelopes to trigger each other at EOF, mix the EOF triggers from the expander and use them to cycle through the sequential switch.

[exper]

Analog OR (also called MAX) would be preferable to Boolean logic OR, since that rectifies the voltage. Especially if combining bipolar modulation like LFOs. I use an Intellijel uMod2 for this, but there’s other options out there. XAOC Samara, Doepfer Min/Max, etc.

[tvparcable]

Interesting, thanks for the replies. For some reason, I always assumed it was possible since even the manual mentions things like AHR envelopes. On MI's Stages, even though each "stage" has its own output, it's possible for the first output of a chain of events to spit out the CV of the others, I wonder if it's something that could be added through a fw update on Quadrax?

To combine envelopes you don't want to mix them - their voltages would be added

I guess as long as the signals are not simultaneous it's not a problem - I tried with Cold Mac as a mixer and it works - albeit messing with the gain due to Cold Mac's quirks.

[ima_jrk]

Analog OR (also called MAX) would be preferable to Boolean logic OR, since that rectifies the voltage. Especially if combining bipolar modulation like LFOs. I use an Intellijel uMod2 for this, but there’s other options out there. XAOC Samara, Doepfer Min/Max, etc.

This whole line of thinking blew my mind and I now have a Morph 4 headed my way. I have several quad modulation sources, so thanks for this eye opening series of comments!

[MvK]

I have some difficulties with the knob ranges in AD mode. When the curve character pot is set to near minimum or near maximum there is a lot of "dead space" in the decay knobs lower range. Might it have something to do with the adjustment of the last FW update? Maybe the scaling of the knobs has to be readjusted? Or is it only my unit?

[kisielk]

MvK: it's not just you, based on feedback we're tweaking the knob ranges again.. should be an update coming this week

[MvK]

MvK: it's not just you, based on feedback we're tweaking the knob ranges again.. should be an update coming this week

awesome! thx!

[kisielk]

Keep an eye out on the firmware updates section of our forum, it will be posted there first to give an opportunity for feedback

[Dcramer]

Good to hear about a new update Kiseilk
I’m also wondering if there’s anyway to increase the number of ‘preset attenuverted’ levels in the CV matrix?

Like five or six (or more) different levels to step thru (instead of just four) when routing CV’s, it’d make a huge difference to my way of working with it