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 Forum index » Clavia Nord Modular » G2 Patches - Experimental
Music Easel
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ian-s



Joined: Apr 01, 2004
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PostPosted: Mon Feb 13, 2006 2:46 pm    Post subject: Music Easel Reply with quote  Mark this post and the followings unread

Just a bit of fun

Had a look at the Buchla Easel programming guide and did some research on AH and SynthDIY. This should run on the G2 demo but is not a complete Easel model.
I left out the reverb as that isn’t included in the Demo software. Also the easel’s uniqueness comes from its overall design and cant be replaced in software.

The modulation osc can track the keyboard and be routed to the 2nd gate (which is a combination low pass filter/vca).

The complex oscillator starts with a triangle then creates a sine, square and narrow pulse. The square is derived from a standard comparator, the pulse uses a fixed high pass filter on the square to give a wave with narrow pulses where the square edges are. The Sine is then further modified by a wavewrap module. There are varying ideas on how this was implemented on the easel, some say non linear wave shaping, others say FM but looking at the actual wave samples, the G2 wave wrapper comes pretty close. Finally, a xfade allows mixing between the timbre modified sine and the other selected wave.

The signal then goes through Gate 1 and optionally gate 2. The original has a signal inversion inline with one of the 2nd gate input to allow pseudo high pass effects. Not implemented in this version. Also not implemented is the sequencer and pulser oscillator. My implimentation of the low pass gate could also be improved.

Only 3 variations filled, tweak it yourself.


Easel2.pch2
 Description:
MK II Easel

Download
 Filename:  Easel2.pch2
 Filesize:  3.64 KB
 Downloaded:  2157 Time(s)


Last edited by ian-s on Tue Feb 14, 2006 6:30 pm; edited 1 time in total
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blue hell
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PostPosted: Mon Feb 13, 2006 3:07 pm    Post subject: Re: Music Easel Reply with quote  Mark this post and the followings unread

g2ian wrote:

I left out the reverb as that isn’t included in the Demo software.


Surprise, something was changed in 1.4 :-)

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Jan
also .. could someone please turn down the thermostat a bit.
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blue hell
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PostPosted: Mon Feb 13, 2006 3:21 pm    Post subject: Re: Music Easel Reply with quote  Mark this post and the followings unread

g2ian wrote:
Also the easel’s uniqueness comes from its overall design and cant be replaced in software.


On loading the patch my first reaction was like "is that all", but I've read a bit in the manual as well (after a link was posted somewhere on this forum). It seems well thought out and or a simple system there are a lot of possibilities. Things like the self trigger on the envelope really add something to it that another simple synth usually won't have.

BTW, the easel's manual is here : http://www.wavemakers-synth.com/buchla/PaMtEO.pdf

And the thread where this was mentioned is : http://electro-music.com/forum/topic-10024-25.html

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also .. could someone please turn down the thermostat a bit.
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cebec



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PostPosted: Tue Feb 14, 2006 8:56 am    Post subject: Reply with quote  Mark this post and the followings unread

this is a fun little patch... like you said, jan, deceiving in it's seeming simplicity, at first, but it has a unique sound and architecture that i enjoyed tweaking and mutating.
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v-un-v
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PostPosted: Tue Feb 14, 2006 4:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

Jan, have you tried to emulate a Vactrol-like slew in the G2 at all? Shocked Very Happy
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mosc
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PostPosted: Tue Feb 14, 2006 4:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

It does remind me of the sound of a Bucha synth of those early 70s. I've waited quite a while and listened several times before mentioning that because its just a very subjective opinion based on ancient memories.

This patch needs to be completed by bringing out the controls and morphs to the front panel. The Music Easel was intended for live performance. The knobs are key. I wish I had time to do it myself.

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ian-s



Joined: Apr 01, 2004
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PostPosted: Tue Feb 14, 2006 6:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

Here we go, MKII has panel assignments for the non Demo users.
Also worked a bit harder on the low pass gate which behaves like how it is described, including the quasi-high pass function. Also implemented the reverb, pulser and sequencer section (please don't use more than 5 steps) Still runs in the Demo, on my oldish PC anyway.

Have provided some hard wired patching through mixers but you can of cause repatch yourself.
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Scott Stites
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PostPosted: Tue Feb 14, 2006 7:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

I have got to get a computer made in this millenium!

Not having tried the patch yet (don't know if you've already tried it) but I recall Grant Richter talking on the SDIY list about emulating the response of the VTL5C3 with a voltage controlled slew.

It basically multed the output of the slew back into the CV input of the slew. Can't remember if it was inverted before it went back to the CV input of the slew or not (great, now my brain hurts) Very Happy

If it's of any interest, the response curves of the VTL5C3 can be seen in the data sheet:

http://optoelectronics.perkinelmer.com/content/Datasheets/vtl5c3_c4.pdf

Hmmm - probably wasn't inverted.

Cheers,
Scott
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ian-s



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PostPosted: Tue Feb 14, 2006 10:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Scott

This patch doesn't attempt to model vactrols at all Embarassed .
I seem to be able to get quite close to those VTL5C3 curves using feedback that changes sign with the input square wave. The G2 doesn't have a VC slew but the 1pole lowpass makes an OK substitute.

Thanks for the tip.
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mosc
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PostPosted: Wed Feb 15, 2006 7:57 am    Post subject: Reply with quote  Mark this post and the followings unread

Took the liberty of mapping the sequencer controls to pages B2 and B3. Of course I used all 16 stages. Why not?

Added a control to page B1 to control the length of the sequencer. Why not?


easel3.pch2
 Description:
Small mods to G2IAN's Music Easel2 patch.

Download
 Filename:  easel3.pch2
 Filesize:  3.68 KB
 Downloaded:  2844 Time(s)


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cebec



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PostPosted: Wed Feb 15, 2006 10:34 am    Post subject: Reply with quote  Mark this post and the followings unread

nice going! those additions are great and the knob control makes this immediately more playable.
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ian-s



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PostPosted: Wed Feb 15, 2006 10:57 am    Post subject: Reply with quote  Mark this post and the followings unread

mosc wrote:
Of course I used all 16 stages. Why not?


Sorry Howard, I forgot to use a smiley when suggesting not to use more than 5 stages. Just a reference to the easel only having a 5 step sequencer.
I never use the G2 assignable knobs myself.
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mosc
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PostPosted: Wed Feb 15, 2006 12:07 pm    Post subject: Reply with quote  Mark this post and the followings unread

g2ian wrote:
mosc wrote:
Of course I used all 16 stages. Why not?


Sorry Howard, I forgot to use a smiley when suggesting not to use more than 5 stages. Just a reference to the easel only having a 5 step sequencer.
I never use the G2 assignable knobs myself.


I notice that you rarely assign knobs. Why is that. Do you have an engine or something?

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ian-s



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PostPosted: Wed Feb 15, 2006 12:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

mosc wrote:
I notice that you rarely assign knobs. Why is that. Do you have an engine or something?


I'm in the minority that does not like the G2 UI. I don't like the paged system, the specific way parameters are named, the feel of the knobs (except volume, that is nice), the LED circle annoys me because it doesn't quite track properly.
Tweaking in the editor may not be ideal but to me it wins simply because I can see all the knobs/switchs/cords at the same time.
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PostPosted: Wed Feb 15, 2006 1:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

v-un-v wrote:
Jan, have you tried to emulate a Vactrol-like slew in the G2 at all? Shocked Very Happy


there is a 303 patch i did in the past that has something like it...
fast attack and slow release but building up when having multiple triggers in a short time.

I am not sure if this is the wright patch...


Acc sweep 2.pch2
 Description:

Download
 Filename:  Acc sweep 2.pch2
 Filesize:  1.82 KB
 Downloaded:  1832 Time(s)

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dualphin



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PostPosted: Wed Feb 06, 2008 2:42 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wow. Beautiful, complex simple synth. Some of my favorite sounds from the G2 demo so far.

dualphin
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cappy2112



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PostPosted: Wed Apr 30, 2008 11:47 pm    Post subject: Re: Music Easel Reply with quote  Mark this post and the followings unread

g2ian wrote:
Just a bit of fun

Had a look at the Buchla Easel programming guide and did some research on AH and SynthDIY. This should run on the G2 demo but is not a complete Easel model.
I left out the reverb as that isn’t included in the Demo software. Also the easel’s uniqueness comes from its overall design and cant be replaced in software.

The modulation osc can track the keyboard and be routed to the 2nd gate (which is a combination low pass filter/vca).

The complex oscillator starts with a triangle then creates a sine, square and narrow pulse. The square is derived from a standard comparator, the pulse uses a fixed high pass filter on the square to give a wave with narrow pulses where the square edges are. The Sine is then further modified by a wavewrap module. There are varying ideas on how this was implemented on the easel, some say non linear wave shaping, others say FM but looking at the actual wave samples, the G2 wave wrapper comes pretty close. Finally, a xfade allows mixing between the timbre modified sine and the other selected wave.

The signal then goes through Gate 1 and optionally gate 2. The original has a signal inversion inline with one of the 2nd gate input to allow pseudo high pass effects. Not implemented in this version. Also not implemented is the sequencer and pulser oscillator. My implimentation of the low pass gate could also be improved.

Only 3 variations filled, tweak it yourself.


Haven't tried this patch, but after seeing this video, can you guess what the next thing I will be doing? Wink

http://vimeo.com/902069

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