DIY analog synthesizer pages
The new Bergfotron recording mixer (top)
Latest news
February 3rd, 2010.
A reader pointed out that the schematics for the Woodwind
waveshaper was missing from the Advanced VCO
page. This has now been added. A few broken links have also been amended over
time.
March 22nd, 2009.
At last a new AMORE module! The prototype for this
module was completed half a year ago but due to lack of time, I could not
complete the design changes and write-up until now. This VCO module is by far
the most complicated AMORE module yet, it's almost a "synthesizer within
the synthesizer". That's why it's called the Advanced
VCO.
February 7th, 2009.
I have finally completed my recording mixer that replaces a
less-than-reliable Tascam MM-1. The mixer is tailor-made for my current studio,
where all recording is done with a DAW program in the PC. Because effects and EQ
is done with software plugins in the computer, the mixer can be made simpler. In
normal use, it doesn't even mix. It's used more like a kind of patchbay that
also can mix. All mixing of recorded tracks is of course done in software on the
PC. I included a midi switcher in the mixer, so I can simply select with a
knob which controller plays each synth. There are toggle switches to select
which input channel is sent to recording or to two aux busses. More than one
channel can be sent to each bus. There are separate volume knobs for the monitor
speakers and headphones. So I can turn down the speakers without affecting the
earphones. The meters are from a scrapped cassette player and connected to one
of the aux busses. They work, but are mainly a ”decoration”. All
channels have right, left and mono inputs. The mono and stereo inputs are mixing,
so in a pinch, each channel can be used for two synths.
The mixer electronics is based on OP275 op-amps. All mixer electronics, pots and
switches are soldered to a single circuit board. The midi switcher (rotary
switches and electronics) is on a separate board.
Jörgen
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Analog Modules of Reusable Engineering (AMORE)
Voltage controlled oscillators
Analogue synth enthusiasts of Stockholm
Latest update February 3rd, 2010.
