Q155 Curver from Dotcom.

Synth Con Meo · Post by **Synth Con Meo** » Tue Jul 23, 2019 11:11 pm

https://www.synthesizers.com/q155.html

Thoughts?

josaka · Post by **josaka** » Tue Jul 23, 2019 11:16 pm

looks pretty good.. lot of features..
be nice to see a video of them being used in sequence..
not sure I will get one..

[video][/video]

Flareless · Post by **Flareless** » Wed Jul 24, 2019 2:46 am

Synth Con Meo wrote:https://www.synthesizers.com/q155.html

Thoughts?

I ordered one! Looks kinda cool.

ba1 · Post by **ba1** » Wed Jul 24, 2019 3:44 am

That's a lot of bang for 1hp! Doesn't look too cramped either.

Jari Jokinen · Post by **Jari Jokinen** » Wed Jul 24, 2019 10:37 am

The inverter inverts only when control voltage is applied. Could be more convenient the other way round. Perhaps with a jumper.

sduck · Post by **sduck** » Wed Jul 24, 2019 10:44 am

Jari Jokinen wrote:The inverter inverts only when control voltage is applied. Could be more convenient the other way round. Perhaps with a jumper.

I was wondering about that also. It would be super easy to run a line from the positive voltage (perhaps with resistor in it) to the switching lug on the jack, provided that's not already in use. Then it would always be an inverter, unless you plugged something in.

Dave Peck · Post by **Dave Peck** » Wed Jul 24, 2019 11:21 am

Modulating the curve of a complex audio signal (like a filter output), especially with an audio rate CV source, can yield some really cool and bizarre distortion effects. Nice!

Dave Peck · Post by **Dave Peck** » Wed Jul 24, 2019 11:31 am

Jari Jokinen wrote:The inverter inverts only when control voltage is applied. Could be more convenient the other way round. Perhaps with a jumper.

Is that correct? Watch right around 6:00 when he moves the saw wave signal from the curver section to the inverter section. The 'up' saw becomes a 'down' saw as soon as it is patched into the inverter, before any CV is connected.

josaka · Post by **josaka** » Wed Jul 24, 2019 12:24 pm

Dave Peck wrote:
Jari Jokinen wrote:The inverter inverts only when control voltage is applied. Could be more convenient the other way round. Perhaps with a jumper.
Is that correct? Watch right around 6:00 when he moves the saw wave signal from the curver section to the inverter section. The 'up' saw becomes a 'down' saw as soon as it is patched into the inverter, before any CV is connected.

from the datasheet 'LED indicates Inversion" ..

no sign of any jumpers.

ranix · Post by **ranix** » Wed Jul 24, 2019 1:19 pm

Wiggler Flareless built me a CGS Slope Detector awhile back. One of the coolest things I did with it was splitting the pitch CV of my keyboard through a slew limiter and sending the result to the Slope Detector. The output of the Slope Detector is a signal that tells whether the note I'm playing now is higher or lower in pitch than the previous note. I can use it to alter modulation such that if I'm playing an ascending melody a certain modulation is applied, but if I'm playing a descending melody a different modulation is applied. It's fun.

Bob Borries · Post by **Bob Borries** » Wed Jul 24, 2019 1:23 pm

Hook a slow LFO to the curve CV in, insert an audio rate Sawtooth into the input and put the output to a wavetable Waveshaper VCO, like a Disting K3 algorithm, Mini-Wave or Piston Honda. You've got a wavetable that sounds like PWM!

Jari Jokinen · Post by **Jari Jokinen** » Wed Jul 24, 2019 1:57 pm

Dave Peck wrote:
Jari Jokinen wrote:The inverter inverts only when control voltage is applied. Could be more convenient the other way round. Perhaps with a jumper.
Is that correct? Watch right around 6:00 when he moves the saw wave signal from the curver section to the inverter section. The 'up' saw becomes a 'down' saw as soon as it is patched into the inverter, before any CV is connected.

You are right. That seems a good feature to me. Apparently the led indicates inversion only when control voltage is used.

Jari Jokinen · Post by **Jari Jokinen** » Wed Jul 24, 2019 2:01 pm

I could use the Curver as a tracking generator for keyboard voltages...

Flareless · Post by **Flareless** » Wed Jul 24, 2019 6:42 pm

Jari Jokinen wrote:I could use the Curver as a tracking generator for keyboard voltages...

I think it works in only one direction though. The CGS62 Slope Detector is more flexible in that respect.

I got mine for the Curver and of course, the extra VCA (I hear you can never have too many). The other two utility features are just gravy.

TimeRaveler · Post by **TimeRaveler** » Thu Jul 25, 2019 2:30 pm

What do you mean by "tracking generator"? Haven't heard of that.

dslocum · Post by **dslocum** » Thu Jul 25, 2019 4:58 pm

I LOVE this. Why the F**K didn't I do this!???? Brilliant! (Damn it)

Voltage_Controller · Post by **Voltage_Controller** » Thu Jul 25, 2019 8:11 pm

I am happy roger has accepted the "single function per module" philosophy is dated. He is keeping his line relevant by updating his perspective. Kudos to roger!

Jari Jokinen · Post by **Jari Jokinen** » Fri Jul 26, 2019 9:02 am

TimeRaveler wrote:What do you mean by "tracking generator"? Haven't heard of that.

Oberheim Matrix synths have so called Tracking generators: "The tracking generator provides a mapping from a control source (e.g. key range on the keyboard, or volume pedal, or mod wheel) to a modified output, based on the user-defined settings of the generator."

Nothing special in case of the Curver. Just a quick way to trim a control voltage. For example, if you would want unlinear keyboard control over filter frequency.

kindredlost · Post by **kindredlost** » Fri Jul 26, 2019 2:40 pm

Bob Borries wrote:Hook a slow LFO to the curve CV in, insert an audio rate Sawtooth into the input and put the output to a wavetable Waveshaper VCO, like a Disting K3 algorithm, Mini-Wave or Piston Honda. You've got a wavetable that sounds like PWM!

Brilliant patch idea!

diophantine · Post by **diophantine** » Fri Jul 26, 2019 7:46 pm

An interesting module from Roger - some neat things in there!

I haven't actually looked closely at the "curver" part, but it looks pretty interesting, particularly for use on CVs, though the wavetable example above is also intriguing...

An extra VCA is, of course, always welcome!

Kinda wish that the functionality of the inverter & slope detector had been switched. In my Synthasystem I have a 'Selective Inverter' which is basically a CV processor/mixer + gate-able inversion. I rarely use it for the gate-able inversion. But having a slope detector with the rise/steady/fall outputs like the CGS would have been really awesome!

It also doesn't feel as compressed as some of his other recent offerings... just feels like a CV toolbox, which is a good thing.

Synth Con Meo · Post by **Synth Con Meo** » Sun Jul 28, 2019 5:16 pm

Well I broke down and also pre-ordered it. I needed to get a couple things from Dotcom for one of my cabinets anyway so I decided to piggyback buying this with the order.

TimeRaveler · Post by **TimeRaveler** » Fri Aug 09, 2019 1:32 pm

Hmmm...right on the fence about this one - anyone have any more innovative ideas for how to use the curver or slope detector especially? I WANT TO BELIEVE.

josaka · Post by **josaka** » Fri Aug 09, 2019 6:10 pm

TimeRaveler wrote:Hmmm...right on the fence about this one - anyone have any more innovative ideas for how to use the curver or slope detector especially? I WANT TO BELIEVE.

Im with you.. why in the video did he not link any of the sections to show off the whole module.?. also.. while i'm here.. these pics of waves.. I dont really care.. I need to hear stuff.. not see it..

Mirolab · Post by **Mirolab** » Fri Aug 16, 2019 12:06 pm

josaka wrote: .. these pics of waves.. I dont really care.. I need to hear stuff.. not see it..

I like seeing the wavforms!.... It helps me understand what is going on with the signal processing. Even if you don't find it helpful, why would you discourage providing us MORE information?
However, I do find the slow updating LCD scopes frustrating. I prefer seeing waves on my CRT scope in realtime. I'd like to find an inexpensive solid state scope that has a good realtime response.

Dave Peck · Post by **Dave Peck** » Wed Nov 27, 2019 5:21 pm

Anybody have any more info/experience/etc with this Q155 Curver module? how are you liking it? Any audio clips?

MOD WIGGLER

MOD WIGGLER

Q155 Curver from Dotcom.

Q155 Curver from Dotcom.

Re: Q155 Curver from Dotcom.