Avoiding Hum From Power Supplies

If you are buying a second-hand rack, or if you already have a Doepfer modular rack with a cheap alternative (non-Doepfer) power supply you should be aware of how to avoid the (minor) transformer hum that cheap PSUs generate.

In the area near those power supplies (bottom right) no modules should be assembled that are sensitive to transformer hum.
Doepfer recommends to assemble only control voltage modules in this area (e.g. LFO, ADSR, trigger delay, clock divider/sequencer, sequencer, slew limiter, MIDI interfaces and so on)
,but no audio modules (VCO, VCF, VCA, VCP, frequency shifter, ring modulator, spring reverb and so on)
Also don't put the A-178 Theremin modules near the power supply.

Doepfer Power Supply I ( PSU I )

This matters for some of the cheap alternative non-Doepfer power supplies, and for the old Doepfer versions with PSU I 
For new A-100G3/G6 cases (with original PSU II) this does not apply. 

Find out how to distinguish the old transformer (PSU I) from the new version (PSU II) at http://patchpierre.blogspot.nl/2012/07/doepfer-power-supplies.html

More info at http://www.doepfer.de/a100p_e.htm#A100P6

A-143-9 Demo by Hawklord2112

Video: A-143-9 Demo

" Simple runthrough of the Doepfer A143-9 VCQLFO"

Uploaded by hawklord2112
Twitter: https://twitter.com/hawklord2112

Doepfer A-117 Digital Noise/808 Source Tutorials by Raul Pena

Yay!
Raul Pena is back with a brand new series, this time all about the Doepfer A-117 Digital Noise/808 Source.

Here is part one, the rest will be added here when they are published (every thursday).

Video 1: Doepfer A117 DNG Basics and Percussion
" Brief Description and Demonstration of the Doepfer A117 Digital Noise, Random Clock and 808 source. Demonstrations of how to create percussion sounds with this module.Sound and Video by Raul Pena."

Video 2: Doepfer A117 Playable Noise and Special FX

" Demonstration of "playable" noise using the Doepfer A-117 DNG. There is also a short demonstration of a Special Effect from the manual for the A-117. Sound and Video by Raul Pena."

Check out Raul's latest survey at http://www.surveymonkey.com/s/K3Z9PVF
Other places to find Raul's World of Synths on the Web
raulsworldofsynths on YouTube
raulsworldofsynths on Vimeo
raulsworldofsynths on SoundCloud
raulsworldofsynths at iTunes
raulsworldofsynths at CDBABY

250th PatchPierre Post

Whooohooo...
Okay, it might seem a bit unnecessary to write a celebratory blogpost every 50th post, but it does feel like another milestone again.

I am happy to say the blog is still going strong after a relatively bad year for me personally, and glad that working on new blog-posts kept/keeps me distracted from all the negativity surrounding that.
Thank you so much again for all the support and the positive feedback.

I would like to share a few PatchPierre numbers with you about the PatchPierre universe:

- PatchPierre blog will reach the 75.000 pageviews this month, in a little over 2½ year.
- an average of around 5.000 pageviews per month lately, and this number is still climbing.
- Almost 1.100 people follow PatchPierre on Twitter

- Patchpierre.Net welcomed visitors from 126 countries


Top 10 countries  /  Pageviews

United States               17483

Netherlands                 10184

Germany                      6566

United Kingdom            5961

Russia                          4338

France                          2634

Italy                             1604

Canada                          806

Slovenia                         796

Ukraine                          522

Top 10 most visited posts                                               Date published

150th PatchPierre Post                                                     Dec 11, 2011

DIY Modular Case Ideas                                                     Jan 1, 2012

100th PatchPierre Post                                                    May 22, 2011

Vactrol Basics                                                                  Feb 21, 2011

Dark Energy II Announced                                                 Feb 7, 2012

MusikMesse 2012 Dark Energy II and A-157 News and ... Mar 24, 2012

50th PatchPierre Post                                                        Dec 7, 2010

Florian Schneider - Electronic Poem                                 Feb 19, 2012

200th PatchPierre Post                                                     May 6, 2012

CEM chips in Doepfer Modules                                        Feb 28, 2012

- Also more than 10.000 people downloaded and installed my free PatchPierre Mobile - Nokia app
  (more info at http://patchpierre.blogspot.nl/search/label/Apps)
- Almost 15.000 views of my YouTube videos at http://www.youtube.com/netpierretv (subscribe!)

- I could use more likes on my Facebook page
- and donations (big or small) are still welcome via PayPal

  (info at http://patchpierre.blogspot.nl/p/patchpierre-donors.html)

Donations will keep PatchPierre ad-free

Finding new topics is getting harder as i have already reviewed most of the Doepfer modules i own, but i hope i can keep the blog interesting enough in the future with a wider range of eurorack related posts.

If you have any suggestions / questions etc... feel free to contact me.

Thanks again for the support, regular posting returns this thursday with the start of a completely new Doepfer tutorial video series by Raul Pena!

Glow In The Dark Patch Cables

A nice way to pimp your eurorack;
Glow-in-the-dark patch cables by Expert Sleepers, the people who brought you Silent Way and more...

Video: Glow-in-the-dark patch cables

Available in 300mm, 500mm and 800mm lengths.
Order at http://expert-sleepers.co.uk/accessories.html

via @expertsleepers

Quick Tip X : The Warm Up

Good performances need a good preparation and a warm-up.
That does not only count for sports-prestations, but also for your (eurorack modular) analog synthesizer.

2 Doepfer VCOs that could use a good warm up

If you are looking for getting the best out of your Doepfer A-100, understand that you need to give your system at least 20 to 30 minutes to warm up.
If you don't give it that amount of time, the tuning can/will probably be (slightly) off.

To be clear, it's not a question of the "A-100" warming up, but of the modules installed.
In some cases, the warm-up period of a module is mentioned in the manual or on the web-page of the module in question.

Especially VCOs like A-110, A-111-1, A-111-5, A-143-4 need a warming-up to become stable and reliable.
If no warm-up period is mentioned the VCO is stable very soon (like the CEM3340-based A-111-1).

The PSU type (Doepfer power supply I or II) has no influence.

Random Video: Kids on the Eurorack Modular

An 'oldie'... uploaded by machinate before i started my blog.

A combination of Eurorack (i see a lot of Doepfer) and kids.
Simply adorable...

Video: My kids on the EuroRack modular


Uploaded 27 aug 2009 by machinate