Preliminary information. A brand new issue is due for shipping in May or June 2008.
Constructional difficulty: 1U version, easy to moderate. 2U version, moderate
The SVF in its new 1U 'filter core' format.
This is a two pole multimode filter capable of high pass, low pass, band pass and notch output modes. All four outputs are available simultaneously. This new version of the very popular original Oakley design is based around the classic two pole state variable filter as used in a variety of vintage synths including Oberheim SEM and OB-Sx. The filter can be tickled into oscillation over most of the audio band and is temperature compensated.
The design is intended to fit into a 1U wide 'filter-core' module or a more fully featured 2U wide panel with seven control pots.
The 1U 'Filter Core' format is our new way of handling filter modules. Although the 1U module can be used as a filter module on its own, it is expected that users will make use of external mixers to control CV and audio levels going into the filter. In this way, you will be able to have a collection of space saving 1U filter cores that can be used with any generic mixer module. The Oakley Multimix is an ideal choice for a handy mixer module.
For the 2U design three audio inputs are provided each with its own attenuator. Three CVs can control the cut-off of the filter. One is fixed at 1V/octave, the other two have input attenuators. CV1 features a reversible type attenuator with inverting/non-inverting properties.
The view of the rear of the 1U filter core module. This is the prototype issue 3 PCB. The production issue 4 board will be different.
Project Downloads
SVF issue 4 User Guide
Use 'save as...' button to download and view the files. IE users need to right hand mouse click and then choose 'save as'. Links to schematics are available to purchasers of the PCB or module and will be sent via e-mail when the board(s) are shipped.
Front Panel database
A Schaeffer front panel can be made for either of the two variants of the new Journeyman module. The databases can be found here: 2U format or 1U filter core. To read these files you will need a copy of 'Frontplatten designer' from Schaeffer. The program also features on-line ordering, so its now even easier to buy your panels from Scheaffer.
To read this file you will need a copy of 'Frontplatten designer' from Schaeffer. The program also features on-line ordering, so its now even easier to buy your panels from Scheaffer.
The company are based in Berlin in Germany and will send out panels to anywhere in the world. Delivery to the UK normally takes around ten days. For North American users you can also order your Schaeffer panels from Front Panel Express.
Back to projects page: Projects
Back home