A short video of Paul playing a 223e.
Always amazes me as to how responsive this is.
Some pics of the patch:
The unedited version of the video is here:
http://youtu.be/R02sXnVprvA
Showing posts with label Eurorack. Show all posts
Showing posts with label Eurorack. Show all posts
Saturday, 7 March 2015
Saturday, 14 February 2015
8000 Drums - Roland CR-8000, some Buchla & Euro
Paul A. (aka Cobramatic) has just finished modding his Roland CR-8000
and is justifiably proud. The drum sounds amazing and I want to do this
to mine too. What better excuse for a jam.
and is justifiably proud. The drum sounds amazing and I want to do this
to mine too. What better excuse for a jam.
Labels:
Buchla,
Cobramatic,
Drum Machine,
Eurorack,
JonDent,
Roland
Saturday, 17 January 2015
Bently Rhythm Ace test video
This is a test video of the Bentley Rhythm Ace sync Mod.
Here is my previous post with the mod details:
djjondent.blogspot.com.au/2015/01/bentley-rhythm-ace-fr-8l-roland-tr77.html
The Bentley is almost identical to the Roland TR 77 however its sync input
appears in a different place.
We are testing the drum using a combination of modules: lots of Buchla
for the background sounds but the actual drum is triggered from a Eurorack format Flame Arpeggiator sending +5V clock pulses
Seems to work perfectly. More mods coming soon.
Here is my previous post with the mod details:
djjondent.blogspot.com.au/2015/01/bentley-rhythm-ace-fr-8l-roland-tr77.html
The Bentley is almost identical to the Roland TR 77 however its sync input
appears in a different place.
We are testing the drum using a combination of modules: lots of Buchla
for the background sounds but the actual drum is triggered from a Eurorack format Flame Arpeggiator sending +5V clock pulses
Seems to work perfectly. More mods coming soon.
Labels:
Buchla,
Cobramatic,
DIY,
Drum Machine,
Eurorack,
JonDent,
Roland
Saturday, 15 November 2014
Roland TR-77 (Bentley Rhythm Ace) drum with Buchla & Euro
A record of last weeks jam with Paul A (Cobramatic).
Playing around with lots of Buchla, Euro modular stuff and attempting to sync with old drum machines. Mainly Roland. The CR 68 has a very nice & useful trigger out which is handy for sync/clocking purposes.
The machine below is called the "Bentley Rhythm Ace FR8L"
It is actually the model that precedes the Roland TR77. The TR77 is almost identical but has a slightly different layout and features.The TR 77 is a bit older and doesn't have any triggers out or in.

Still its a beauty. Incredible lush warmth from the kick. It uses all discrete components & analogue voice circuits to produce its drum sounds. "TR" stands for "transistor rhythm" It was produced in 1972. It was I believe Roland's first drum machine.
It was one of a trio of drum machines released by Roland that year: the 33,55 & the 77.
The Bentley has what must be one of the sexiest start/stop switches around ..... esp as its from 1972.
Its a touch sensitive metal plate.
We had to pass this through a Buchla 230 to enable clocking. Seems to work OK.
a Short video:
Sorry about the audio quality
Playing around with lots of Buchla, Euro modular stuff and attempting to sync with old drum machines. Mainly Roland. The CR 68 has a very nice & useful trigger out which is handy for sync/clocking purposes.
The machine below is called the "Bentley Rhythm Ace FR8L"
It is actually the model that precedes the Roland TR77. The TR77 is almost identical but has a slightly different layout and features.The TR 77 is a bit older and doesn't have any triggers out or in.

Still its a beauty. Incredible lush warmth from the kick. It uses all discrete components & analogue voice circuits to produce its drum sounds. "TR" stands for "transistor rhythm" It was produced in 1972. It was I believe Roland's first drum machine.
It was one of a trio of drum machines released by Roland that year: the 33,55 & the 77.
The Bentley has what must be one of the sexiest start/stop switches around ..... esp as its from 1972.
Its a touch sensitive metal plate.
We had to pass this through a Buchla 230 to enable clocking. Seems to work OK.
The Buchla 230 is mounted on its side in this case to save room.
a Short video:
Sorry about the audio quality
Labels:
Buchla,
Cobramatic,
Drum Machine,
Eurorack,
JonDent,
Korg,
Roland
Tuesday, 11 November 2014
A Roland CR 68 with a Buchla 200 (and a bit of Euro)
I love these old drum machines.
The Roland CR 68 is one of my favourites.
It's sending a trigger out to a Buchla 230 envelope follower.
It's sending a trigger out to a Buchla 230 envelope follower.
The 230 is mounted on its side.
A 208r
Labels:
Buchla,
Cobramatic,
Drum Machine,
Eurorack,
JonDent,
Korg,
Roland
Wednesday, 8 October 2014
A visit to Non Linear Circuits - Perth, Western Australia
While on a recent trip to Perth I dropped by to visit my friend Andrew F of Nonlinear Circuits.
I got to meet Pinky :-)
2 tri-core VCOs
2 LFOs
2 LPGs
3 VCAs
VC spring reverb
diff-rectifier
jerkoff chaos
2x Buchla inspired 281 EGs
Sauce of Unce (SOU). Based on the Buchla 265
This is part of an electronic analog computer which Andrew rescued many years ago. It's programmed using patchcords that connect op-amps, capacitors, resistors, etc. to carry out calculations.
A adder circuit. It's a lovely illustration of how the Op amp's
negative feedback can be used to do computations.
The integrator.
This op-amp circuit performs the mathematical operation of Integration.
The output voltage is proportional to the integral of the input voltage. (ie: the size of the output is controlled by the length of time a voltage is present at its input). This is determined by the negative feedback capacitor which charges/discharges.
I got to meet Pinky :-)
This is "Synth Porn"
And even more famous than Pinky are Randy & Bill
Randy is on the left. Bill who is only 4 months old is on the right.
Back to the synths:
This is all Eurorack format, consisting of :2 tri-core VCOs
2 LFOs
2 LPGs
3 VCAs
VC spring reverb
diff-rectifier
jerkoff chaos
2x Buchla inspired 281 EGs
Sauce of Unce (SOU). Based on the Buchla 265
A new NLC Serge format Panel.
This comprises:
Two VCOs
diff-rectifier
Vibes (a collection of fixed filters)
VCA
Mixer
A adder circuit. It's a lovely illustration of how the Op amp's
negative feedback can be used to do computations.
This circuit adds the 3 inputs.
Vout = -R4[V1/R1+V2/R2+V3/R3]
The integrator.
This op-amp circuit performs the mathematical operation of Integration.
The output voltage is proportional to the integral of the input voltage. (ie: the size of the output is controlled by the length of time a voltage is present at its input). This is determined by the negative feedback capacitor which charges/discharges.
I'm not sure of the age of this computer. Maybe 1950s / 1960's ????
It's beautiful though.
Pieter Brugel-the-elder, "The Triumph of Death"
c. 1562. The original can be found in the Museo del Prado, Madrid
Skeletons hauling a wagon full of skulls.
Death is indiscriminate. We will all have to face it one day.
Subscribe to:
Posts (Atom)



















































