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Hear the JH-720 on several tracks of
my new CD "Dark November"
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Hear the JH-720 on several tracks of my new CD "Dark November" |
A collection of features from various instruments ...
The instrument is called "720" because the main inspiration came from
two Korg instruments, the Korg 700 (Mini Korg) and the MS-20. I'm giving
a list of my sources, but some of the circuits are actually my own inventions.
For instance, the HADSR structure of the main ENV generator is clearly
inspired by the MS-20, but the implementation is completely different,
using a fully voltage controlled envelope circuit (see schematics below).
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| Important note: This is not a complete description
to build a copy of my JH-720 Synthesizer. It should give a good impression
of the circuit design and it's oddities nevertheless, and hopefully the
synth-diy community will find some if it inspiring. I've taken the scans
directly from the folder where I keep the JH-720 documents, so the drawings
should be close to what I've actually built, but there is no guarantee
that it will work exactly as presented.
Many of these circuits are based on various Korg circuits, but the blend of different circuit parts, and some additions and optimizing, are my own. The circuits (speaking of my part, and not for Korg) are free for private, non-comercial use. (In particular, I don't want to find them in modules starting with "A-" of a German manufacturer starting with "D".) |
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