Jacob Korn

Oberheim Matrix 1000 1.16 rom upgrade

Posted by in equipment, mods & repairs, News, Studio

Oberheim Matrix 1000 EPROM chip, operating system version 1.16. The last official version released by Oberheim was 1.11; this version corrects some MIDI SysEx control issues that Oberheim overlooked, such as a really slow response to filter cutoff frequency settings. This replaces chip U804 on the main board (it is socketed, so no soldering is required). Took about 30min. – Bug fixes made by Nordcore. – MIDI NRPN parameters editing fix. – Faster processing of parameter changes that need a modulation matrix rebuild, there’s still a small lag but it’s…read more

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Vintage RFZ Preamp Racking

Posted by in equipment, KORN HARDCORE CUSTOMS, mods & repairs, News, rent studio

Those great sounding 70’s preamps from the former GDR broadcasting with discrete design and transformers were found on a local fleamarket.  Now they needed recycled wooden housings (dia boxes) powersupplies und XLR inputs/outputs. Not the most versatile preamp (no low cut,48V) but perfect for dynamic mics. Really pleased with the coloured tone and the huge amplification of 70dB!! V740 schematic:

Boss Chorus Ensemble CE-1 modified

Posted by in equipment, KORN HARDCORE CUSTOMS, mods & repairs

Duration 2h for Mod: 100€ + postage (german clients +19% tax) Fairly simple modification to my favourite chorus device. Its possible to use the depth of the vibrato section for the chorus as well now (or switch it back to original). I can perform this mod for your pedal as well! Please contact me here: www.jacobkorn.de/contact The sound is a dx7 string patch btw. Input impedance mod: Replace the 50k volume pot with a 500k log and for R11 ( 470k) 1M in parallel (=319k).    Duration: 2h

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Alesis HR-16: custom sound roms

Posted by in equipment, KORN HARDCORE CUSTOMS, mods & repairs, Studio

Replaced the internal sound eproms of the cheesy sounding machine from 1987. The new roms include 2*48 sounds of Classic drummachines like TR-707, TR-727, 909, Linndrum, DMX, RZ-1 etc. Still needs the overall pitch adjustment mod. Thanks to Alex Erlewein for burning the eproms and the help! more info here: http://www.burnkit2600.com/hr-16/ http://www.vintagesynth.com/misc/hr16.php    

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