Sunday, 24 April 2016

Buchla 216 & 114 Keyboard

Some musings on the 216 & 114... before I forget.

This site is my online diary where I sometimes jot down ideas. Please write to me if this is of help
to anyone else (or if this is downright BS).

Anyway, these keyboards aren't your usual Buchla type touch controllers.

The left 3 keys of the 216 are totally different to the right section.
They might as well be separate keyboards.
The right side has your standard two CV outs per key (with respective pots to set the CV level).
There is just one (double) CV pulse out for the 8 keys.

The left 3 keys each have separate CV outs (set by the lower pot) and a separate pulse out.
So we have 3 keys that that are not connected to each other .
The lower knob sets the initial CV level & the upper knob sets the decay slope for that voltage.

How does one use such a device & why would Don B make such a controller?
I think the answer lies with his early interest in music concrete & in the playing back of recorded tape loops.

When each key is patched into a VCA the lower pot will open & close the gate, and the upper pot
will control the duration length of the sound. A three key controller like the 216, will allow you
to "play" 3 sounds.

A 10 key controller like the 114 will allow access to ten sounds.
This is why I believe Don also produced the 107 - voltage controlled mixer.


 It's not just a mixer. It's really 10 VCAs.


The 10 keys on the 114 & the 10 inputs on the 107 seem to match and make a lot of sense.

If you are using a 216, with only 3 such keys a 292 is a good alternative VCA to match.

Philae Temple - Egypt

This is now a island, but it was once a temple complex located near the expansive First Cataract of the Nile River in southern Egypt.




 This place is amazing for many reasons.
The building of the Aswan Dam would have flooded the ancient site completely. So the engineers moved this entire temple complex to higher ground.
A breathtaking feat.

Philae was said to be one of the burying-places of Osiris.









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Carl Cox Pure - Sydney 23/04/16

Carl Cox at Pure - Hordern Pavillion.
A great night out. Now that Future & the Big Day Out are finished I hope Carl
will be stepping up to the decks more often here in Australia.

A video posted by jono (@dj_jondent) on

The 2016 lineup features Cox himself alongside internationals Joseph Capriati and
 Format:B and locals DJ HMC and Eric Powell.



The 2016 lineup features Cox himself alongside internationals Joseph Capriati and Format:B and locals DJ HMC and Eric Powell. - See more at: http://www.beat.com.au/music/carl-cox-unveils-lineup-pure-event#sthash.JN9VXTwp.dpuf
The 2016 lineup features Cox himself alongside internationals Joseph Capriati and Format:B and locals DJ HMC and Eric Powell. - See more at: http://www.beat.com.au/music/carl-cox-unveils-lineup-pure-event#sthash.JN9VXTwp.dpufC
The 2016 lineup features Cox himself alongside internationals Joseph Capriati and Format:B and locals DJ HMC and Eric Powell. - See more at: http://www.beat.com.au/music/carl-cox-unveils-lineup-pure-event#sthash.JN9VXTwp.dpuf
The 2016 lineup features Cox himself alongside internationals Joseph Capriati and Format:B and locals DJ HMC and Eric Powell. - See more at: http://www.beat.com.au/music/carl-cox-unveils-lineup-pure-event#sthash.JN9VXTwp.dpuf
The 2016 lineup features Cox himself alongside internationals Joseph Capriati and Format:B and locals DJ HMC and Eric Powell. - See more at: http://www.beat.com.au/music/carl-cox-unveils-lineup-pure-event#sthash.JN9VXTwp.dpuf
The 2016 lineup features Cox himself alongside internationals Joseph Capriati and Format:B and locals DJ HMC and Eric Powell. - See more at: http://www.beat.com.au/music/carl-cox-unveils-lineup-pure-event#sthash.JN9VXTwp.dpuf

New Sound Waves Meeting - 17/04/16

It's always lots of fun to meet up with the guys from NSWaves.
I got there a bit late, so many of the guys had gone home.
Still there was much to see & it was a Sunday arvo well spent.


Justin of Metro Modular showing some of his new modules.
Plus his beautiful valve oscillators:

 Justin's facebook page for MetroModular is here:
https://www.facebook.com/Metro.Modular/info?tab=page_info

His website is here:
http://www.metro-modular.com/



They just don't build them like this anymore.




My 12u Buchla:


Tuesday, 12 April 2016

Quick & dirty DIY Buchla to Euro conversion

These are my quick and dirty DIY notes for a Buchla to Euro power converter.
This blog is my diary for ideas, projects etc that are on going. It helps me to remember details that I usually loose if I don't write down.

This will probably change as I refine the circuit. if you have any suggestions for improvements, please let me know.

Buchla provides -15,+15,+12,+5.
Euro needs +12,-12,+5.
So we need a -12V for Buchla & Euro modules to exist in the same case.
Using a L7912CV voltage regulator.
 http://www.st.com/web/en/resource/technical/document/datasheet/CD00000450.pdf


This was my first attempt using perf board.
In the first attempt, the caps were both 1uF electros

Attempt # 2 ... using a 1uf & 2.2uf cap.

I built this for a friend about a year ago and he reports that it's still happily chugging along.
It might be a good idea to add a heat sink to the regulator. C1 is required for stability. A tantalum is recommended, though in this mock up I used a straight electro.

If electrolytics are used and you are planning to run lots of euro maybe ten times (or more) value capacitors should be selected.???

AND: a high current diode from input to output (1N4001 or similar)
should be introduced to protect the device from momentary input short circuit.

29/0416
Some new pics care of Cobramatic.
Paul has used tanties and he reports no problems.
This board doesn't use a heatsink -- will see how this goes over time.

The Buchla (BEMI) power board is on the top.


Disclaimer: 
I take no responsibility if this damages any Euro or Buchla modules or starts a fire. 
Modular gear requires care and more that a casual understanding of electronics.
Don't build this if you are not totally confident with your soldering skills.
These are just working ideas that will be refined over the coming years.

Saturday, 2 April 2016

ARP 2500 - Modcan'd

Playing around with some Eurorack sequencers.
The Modcan Touch is shaping up nicely as a partner for the ARP2500

Taking some samples:


It syncs perfectly with the ARP 1027 sequencer.

 The 1004-T oscillator.

The 1047 filter.

The 1046 Envelope Generator.

The patch.