A description of how I modified my Behringer Neutron synthesizer,
adding circuitry known from the Prophet 5 rev3, allowing for a much cleaner OSC SYNC
sound than the Neutron's native one. An added flip-switch on the front panel now allows me to
toggle between the Neutron's harsh default sync and the smooth, modded behavior that is
also heard in the Behringer Pro-1.
- This Reddit from the guy who once published this mod (but then completely removed it from the web):
https://www.reddit.com/r/synthesizers/comments/9h5aem/behringer_neutron_sync_mod_by_some_clever_guy/ - electricdruid's fantastic article on the 3340 VCO:
https://electricdruid.net/cem3340-vco-voltage-controlled-oscillator-designs/
I used the sync circuit from theSequential Prophet 5 Rev.3scheme in that article. - This discussion on Gearslutz:
https://www.gearslutz.com/board/electronic-music-instruments-and-electronic-music-production/1199238-behringer-neutron-semi-modular-182.html
See this YouTube video.
The whole circuit is extremely inexpensive. I had old, used SMD components lying around, so it cost me nothing except for the €1 flip switch from Amazon.
- BC859 PNP transistor
(because I had one at hand; the other guy used a BC858, and the Prophet scheme suggests a 2N4250) - resistor 10k
- resistor 47k
- cap 100nF
- cap 200pF
- 1 flip switch (3-pole, ON-ON)
- you will also want enough shrinkwrap at hand
- Modifying your Neutron will void its warranty.
- This repo is a pure "works for me" description of how I modified my Neutron.
- I am NOT a professional electronics engineer, and I do NOT guarantee correctness or harmlessness of anything.
- You alone are responsible for damages you do to yourself or your device.