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Showing posts from April, 2011

Booktip VIII - History of House by Chris Kempster

History of House is a very interesting book about the history of House music and the technology behind it.
The book is compiled and edited by Chris Kempster in 1996,  the articles come from music-technology-magazines like 'the Mix', 'Music Technology' and  'Electronics and Music Maker' (E&MM)

The 206-paged book is divided into three parts; The Artists USA, The Artists UK & Europe and a third part that is called 'The Technology'

The first part contains interviews with some of the most influential house-deejays/producers like Marshall Jefferson, Lil'Louis, Larry Heard, Juan Atkins, Derrick May, Kevin Saunderson, Richie Hawtin and Carl Craig.
The interviews that the author/ compiler picked are very well written, and besides giving an insight into the history of house music, they also contain a lot of tech and synthesizer references. Most producers explain what instruments they used and why.
The second part of the book features UK and European a…

A-170 Dual Slew Limiter

I mentioned my A-170 Dual Slew Limiter earlier in a few BFF posts, but so far i never took the time to write a separate blogpost about it. Until now that is...

The A-170 Dual Slew Limiter consists of  two separate slew limiters, also known as portamento controllers or integrators.
In electronics, the slew rate represents the maximum rate of change of a signal at any point in a circuit. Just like a Glide circuitry, it flattens or smoothes the incoming signal.

The top section of the module is the 'simplest' of the two Slew Limiters, with one joint control, which sets both rise and fall times (from approx. 0 ...10 sec).
For precision voltage control this one is recommended, but version One (before May 2009 / check your version number on the module's PCB) had a small voltage drop that was caused by the protection resistor at the A-170 output. ( check Doepfer's solutions for that HERE )  A-170 modules after May 2009 don't have this voltage loss.
The second Slew Limiter has s…

Quotes VIII : Karlheinz Stockhausen

" ...being quiet and meditating on sound is something completely different and will be discovered very soon by a lot of people who feel that the visual world doesn't reach their soul anymore. "

Karlheinz Stockhausen - Composer
( 22 August 1928 – 5 December 2007 )

DIY A-180 2 x 4 Multiples Module

Okay... Maybe not my smartest DIY-project, but at least i tried;
In one of my earlier posts about Doepfer's pre-punched blindplates i stated that you can easily make your own A-180 Multiples module, and save yourself a little bit of money by making your own.

That last thing is correct; it does save you some money (even a bit more if you shop around for components), but if you count the time putting the parts together you can ask yourself if it was also worth your precious time.

I did order a few of the 4HP width blindplates (punched for 8 socket / identical to A-180 front panel but without printing) and also ordered a bunch of sockets from Doepfer and just had to give it a try.

Mounting the jack sockets was simple though the pre-punched holes. Because i wanted it to be a 2 x 4 multiple i thought it would be smart to turn the both sets of 4 multiples in a different way for easy wiring and a certain balance. (but not really necessary)
The wiring was a bit harder. it's not easy to…

Most Wanted - Future Modules Update

It is always good to keep an eye on the posts from the Doepfer Yahoo Usergroup.
Not only to get answer to all the A-100 questions you have, the DIY-tips, and the interesting module discussions but also for Dieter Doepfer's own input, troubleshooting and the occasional company updates.
In one of his latest posts he announced a few interesting 'new' things on Doepfer's to-do list, including a few that are not yet on Doepfer's Future Module page.

The ones you can already find on that page are the A-190-5 polyphonic USB/Midi-to-CV/Gate interface, the A-142-4 Quad Decay, A-195-1 Pitch-to-CV/Midi/USB interface, A-192-2 CV/Gate to Midi interface, A-143-4 Quad VCO/VCLFO and the A-100 touch keyboard.

I already blogged about the forthcoming A-157 Trigger Sequencer (not much info on the Doepfer site, only in a NAMM 2010 brochure), but the update of the A-126 module was new for me.
The A-126-2 Frequency Shifter II will be a redesign of the old module.  Because of availability…

Using the A-100 for Sound Processing

The A-119 External Input / Envelope Follower module allows you to integrate any audio signal (electric guitar, microphone, midi sound module, computer sound card, CD player, tape-recorder ...) into your A-100 system.
Audio inputs of audio-processing A-100 modules (e.g. filter, VCA, phaser, flanger, waveform processor, distortion, wave multiplier, ring modulator, frequency shifter, spring reverb, panning ...) all require line level signals of around 1Vss. , and if the signal source does not have the required level an external pre-amplifier like the A-119 is recommended. 
This module consists of a (pre-)amplifier, an envelope follower and a comparator. The pre-amp has 2 inputs, one unbalanced (Asymmetric) for line level signals, and a balanced (6.3mm jack /Symmetric) input for inserting low level signals, like microphones or electric guitars.
The module provides two simultaneous audio outputs of the amplified signal.
The envelope follower 'reads' an incoming audio-signal and se…