Klavis - CalTrans

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paperCUT
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Post by paperCUT » Fri Jul 19, 2019 12:17 pm

sir stony wrote:I don't think trying to squeeze many more modes and options into this wonderful module is a great idea. If it had a few more ways of visual feedback like a display or a couple more leds, ok.

But it's really a great module already, as it is, and for a reasonable price considering the hours of unavoidable tuning work saved over a couple of years of use. If people need precision adders and cv'able transposers, there are other modules to do that, thinking e.g. vpme t43 and frequency central transeuropa. They are good, but not everyone needs them, and modules that are overstuffed with features and too little visual feedback about what's going on are a sure call for chaos to get lost in, and nobody is a fan of that, right?

I'd prefer to leave the caltrans as it is, nice and slim, but maybe make a bigger brother to it which incorporates such extras, also maybe all the different scales that are in the twin waves, too? Looking at the the µO_C, it wouldn't even have to be any bigger than that.
That's a fair point. After the first 20 mins I had the whole module committed to memory, certainly a welcome change from menu diving.

The thing I cared least about when I got it was the presets but now it's the real power of the module. To illustrate I just recorded this:

Patch is attenuated rising saw into first input on Caltrans. Caltrans feeding all 4 vcos in A-143-4. Then into Derish for delay.

All the variation is from preset switching and adjusting delay, I didn't touch anything else. You can hear in parts the speed the cv changes causes pops 8-)

https://soundcloud.com/tensiontype/calt ... esets-only


Edit: I didn't think to add the quantizer on different channels, next demo!

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paperCUT
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Post by paperCUT » Sat Jul 20, 2019 8:11 am

When changing presets it seems like the previous g/p 'states' are still remembered if you're quick enough, as in if it was slowing gliding up to a note and you switch to a new preset - but then back it remembers where it was along the path. Zentek is that correct? It makes for some really interesting variations.

I'm committed this weekend to make a patch that controls every module I dare from those 4 outs just changing presets 8-)

The spreading of 4 tightly tuned triangle waves, again just changing presets (no fx at all).

https://soundcloud.com/tensiontype/calt ... ets-only-2

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j_dowe
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Post by j_dowe » Fri Aug 30, 2019 10:46 am

I think I need this.

One question .... I'm sending MIDI that is already tweaked for alternate tunings (e.g. Just Intonation, etc. etc.) and then converted to CV. As long as I don't turn on the semitone quantization, the calibration shouldn't affect any sort of micro-tuning, correct?

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Zentek
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Post by Zentek » Fri Aug 30, 2019 11:15 am

j_dowe wrote:I think I need this.

One question .... I'm sending MIDI that is already tweaked for alternate tunings (e.g. Just Intonation, etc. etc.) and then converted to CV. As long as I don't turn on the semitone quantization, the calibration shouldn't affect any sort of micro-tuning, correct?
Yes. That's right.

Eric
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lisa
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Post by lisa » Fri Sep 06, 2019 4:44 am

I can’t find CalTrans anywhere in Europé atm. When will a new batch be available?
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Zentek
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Post by Zentek » Fri Sep 06, 2019 5:04 am

lisa wrote:I can’t find CalTrans anywhere in Europé atm. When will a new batch be available?
According to the tracking, I should receive the shipment ... TODAY ! :sb:
Allow me the time do the checking, programming, packaging and shipping to retailers.
Thank you.

Cheers,

Eric
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Post by lisa » Fri Sep 06, 2019 5:35 am

Ah! Lovely. :loves:

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Post by ookrsia » Fri Oct 11, 2019 8:38 am

Has anyone had any problems with the Caltrans possibly not working with some module? I am especially curious about using it with filters.

My guess is that a filter that outputs a solid sine should work fine, but of course if the output signal gets slightly hairy Caltrans will not work with the module, right?

Also, I'm positively surprised to see that they actually recommend using the module with Buchla (hz/V) devices!

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Post by Zentek » Fri Oct 11, 2019 9:41 am

ookrsia wrote:Has anyone had any problems with the Caltrans possibly not working with some module? I am especially curious about using it with filters.

My guess is that a filter that outputs a solid sine should work fine, but of course if the output signal gets slightly hairy Caltrans will not work with the module, right?
You are absolutely right, as long as the filter (put in resonance) provides a solid sine, it will work perfect. If the signal becomes unusable at some point, the notes from there and beyond (below) will not be playable.
Also, I'm positively surprised to see that they actually recommend using the module with Buchla (hz/V) devices!
Beware, we don't deal here with Volt/Hertz but various Buchla ranges such as 1.2V/Oct or 2V/Oct.

Analog VCOs drift away from their straight V/Oct curve at the top and bottom which is unavoidable by design.
To make the most of the situation, the CalTrans allows the spacing between semitones to be far off the Eurorack's 1/12th of a volt.
Since this capability is always there, it allows tracking oscillators that are not 1 V/Oct. You can easily test the feature by putting an attenuvertor in front of a standard V/Oct input to "create" a non-standard VCO and see how the CalTrans behaves.
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ookrsia
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Post by ookrsia » Mon Oct 14, 2019 10:41 am

Zentek wrote: You are absolutely right, as long as the filter (put in resonance) provides a solid sine, it will work perfect. If the signal becomes unusable at some point, the notes from there and beyond (below) will not be playable.
Good to know! I was kinda hoping Caltrans could be used to solve the wacky volt/octave performance of my Akemie's Taiko, but I think it's probably not possible to make it output clear waveforms.

Zentek wrote: Beware, we don't deal here with Volt/Hertz but various Buchla ranges such as 1.2V/Oct or 2V/Oct.
Thanks for this correction. For some reason I had convinced myself that Buchla use Volt/Hertz!

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Tun
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Post by Tun » Tue Oct 15, 2019 5:35 am

Bought. Love it. Plays great with Marbles. I have all 4 Klavis modules now but unfortunately no room for a Quadigy. Only one thing for it, I'll have to start another row :goo:

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Post by Zentek » Tue Oct 15, 2019 5:43 am

Tun wrote:Bought. Love it. Plays great with Marbles. I have all 4 Klavis modules now but unfortunately no room for a Quadigy. Only one thing for it, I'll have to start another row :goo:
Thanks a lot. Please send a picture! :party:

Eric
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Tun
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Post by Tun » Tue Oct 15, 2019 7:28 am

Zentek

Sorry the Caltrans isn't next to the other 3. To be honest I need to do some reorganising and I doubt the others will stay side by side for much longer.

Image

Cheers :tu:
Last edited by Tun on Tue Oct 15, 2019 7:47 am, edited 1 time in total.

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Post by Tun » Tue Oct 15, 2019 7:47 am

paperCUT wrote:
That's a fair point. After the first 20 mins I had the whole module committed to memory, certainly a welcome change from menu diving.
Agreed

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deftinwulf
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Post by deftinwulf » Tue Oct 15, 2019 2:08 pm

williamjturkel wrote:By the way, if you are looking for ideas for future projects, please make a 16hp 4x4 matrix mixer using the same knob and switch arrangement you used for Mixwitch. I need one for each of my cases.
+1, this would be badass.

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Post by Heliophile » Thu Nov 14, 2019 1:12 pm

Just bought a CalTrans, expecting that it will save me a lot of headaches! The manual states that you shouldn't touch the coarse tuning knobs of your oscillators again after calibration, but that is very difficult with some of my oscillators, which might get knocked out of tune very easily. Can't I just tune them to, say, C1 before calibration and then, if the knobs get bumped, tune them to that note again before patching them into CalTrans? I don't see how that could destroy my calibration.
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Zentek
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Post by Zentek » Fri Nov 15, 2019 7:57 am

Heliophile wrote:Just bought a CalTrans, expecting that it will save me a lot of headaches! The manual states that you shouldn't touch the coarse tuning knobs of your oscillators again after calibration, but that is very difficult with some of my oscillators, which might get knocked out of tune very easily. Can't I just tune them to, say, C1 before calibration and then, if the knobs get bumped, tune them to that note again before patching them into CalTrans? I don't see how that could destroy my calibration.
Sure! If you put the knob back in place as closely as possible it will be OK.

The phrasing in the manual is maybe not the best?
Thanks for drawing my attention.

Eric
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Re: Klavis - CalTrans

Post by Graffie » Tue Jan 07, 2020 9:08 am

The more I think about it, the more I like it. It definitely would solve some tracking issue's while also opening up new posibilities and it optimizes my workflow. This might very well become my third Klavis module i'm buying within relatively short time span. Very nice module considering its size, functionality and price. Starting to become a Klavis fanboy :hail:

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Re: Klavis - CalTrans

Post by SarahB » Sat Mar 14, 2020 12:29 pm

I need some help with a problem. Having completely messed up my Calibration, I want to start over. I can’t get my oscillator to go low enough though. I’ve got my oscillator as low as it will go, but the information already inside the Caltrans (from my messed up calibration) is sending an offset and raising the pitch. This means that I can’t recalibrate it properly.

Is there a way to reset the module back to factory defaults or some way of getting rid of all the presets and starting from scratch? Thanks for any help!

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Re: Klavis - CalTrans

Post by lisa » Sat Mar 14, 2020 1:00 pm

I guess you’ve used the transpose functions? From the manual: ”Press both encoders to reset the transpose”.
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Re: Klavis - CalTrans

Post by SarahB » Sat Mar 14, 2020 1:33 pm

Thanks Lisa. Yes, I’ve tried that. It resets the transpose but not the stored offset from my botched calibration. Hopefully Erik will be along at some point!

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Re: Klavis - CalTrans

Post by Brad s » Sun Mar 15, 2020 8:11 pm

Strangely, I began suffering from the same issue this evening. With the minimum transpose possible from the Caltrans, the lowest pitch possible from the top oscillator on my Instruo Cs-L is C#2. When I remove the pitch cable running from Caltrans into Cs-L the pitch drops to B0 or lower. In the past, when I’d calibrate the Cs-L I would complete the process with all four solid yellow leds lit, and the lowest pitch I could play in tune was B0. Now my calibrations finish with only three solid leds and none blinking. The lowest note is D2 or C#2. I’ve read the manual numerous times. Recalibrated with the VCO at different pitches. No luck. I did switch cases recently. Besides that, everything stayed the same.
Last edited by Brad s on Mon Mar 16, 2020 6:56 pm, edited 2 times in total.

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Re: Klavis - CalTrans

Post by SarahB » Mon Mar 16, 2020 3:21 am

Eric has made a new firmware that allows you to do a neutral calibration. I updated my module, then followed the instructions in the new manual (it’s on the website). Once I had done the neutral calibration, I could then get my oscillator low enough to re-do the v/Oct calibration. It’s working fine for me now.

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Re: Klavis - CalTrans

Post by Tun » Mon Mar 16, 2020 3:36 am

SarahB wrote:
Mon Mar 16, 2020 3:21 am
Eric has made a new firmware that allows you to do a neutral calibration. I updated my module, then followed the instructions in the new manual (it’s on the website). Once I had done the neutral calibration, I could then get my oscillator low enough to re-do the v/Oct calibration. It’s working fine for me now.
That's good to know, thanks SarahB.

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Re: Klavis - CalTrans

Post by Zentek » Mon Mar 16, 2020 4:49 am

Firmware update time ! :party:
V1.09: Brand new feature and overall precision improvement

The CalTrans fulfills two independent roles: calibrator for misbehaving VCOs and musical processing such as transposition and portamento.
We did not immediately realize that the musical aspects offered would be strong enough for many users to acquire a CalTrans for those capabilities only.
In fact, it should have been obvious that having 4 channels would lead to connecting a mix of VCOs that do not all need correction.
Well, so far, you had to calibrate all connected VCOs, including those that can do without.
Several users complained about this annoyance.
This is not mandatory anymore. 8-)

New feature: 1:1 V/Oct neutral in/out V/Oct behavior.
The firmware update now offers a way to define which channels will work without curve correction. :yay:
These channels can then be freely allocated to all of your VCOs that are precise enough to work without dedicated calibration.
It also answers users request of putting channels into "default" calibration.

Improved precision
While implementing the 1:1 V/Oct feature we found issues with the overall precision.
A new self-referencing method is now in place in the firmware to have top-notch precision. :tu:
This benefits both the calibrated and neutral modes.


The new firmware 1.09 is available on the CalTrans page.
Don't forget also downloading the updated 1.3 User Manual ! ;)
Beware, there was a short-lived 1.2 manual, now obsolete.
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