The DK700 is a polyphonic synthesizer with voice assignment. It actually contains 6 complete and individual synth modules (termed voices or channels). It is fully programmable and able to store up to 73 programs in its memory when in DK700 mode and 55 patches for the simultaneous control of slaves when in master keyboard mode. Each voice contains two digitally controlled oscillators (to ensure the best pitch reliability on the whole extension of the wall tempered scale) with analog waveforms. It also comprises a 24 dB/octave low pass Voltage-controlled filter and an envelope generator; this means that the DK700 has 12 oscillators, 6 filters, 6 envelope generators and 4 low frequency oscillators providing parallel modulations of parameters such as pitches, square waves P.W., filters. All this is controlled by specific controls and memorized in the heart of the DK700; the "Programming Unit", which also provides to the management of the 73 timbric programs and 55 patches.

The DK700 is basically an updated version of the Siel Opera 6 with added midi-functions. It's quite rare and could be regarded as one of the best Siel ever built. Unlike the DK70/80, the DK700 has six filters and three LFOs to shape your sounds. Once you edited the sound you had in mind, there are plenty of memory patches to store it. This synth has a fat tone even without using a Chorus-unit. The sounds are very versatile and analogue. From synth-horns to weird effects, the Siel does it all with ease.

Jay van Bruggen

April 12, 2013 @ 1:47 pm

A friend of mine is quite close to finishing repairing a DK700 over the last five years, that also died from battery acid. But after bridging and repairing the local damages it turned out he needed to replace several IC's and do a lot of measuring, but it's working now. Only it's still a bit unstable he tells me.

David

October 31, 2012 @ 8:12 pm

I might be interested Jesse: Alpemannen at hotmail dot com

Jesse

July 20, 2012 @ 1:33 am

I just got one of these for free, they sound good, but are annoying to program....Does anyone know what they sell for?

robespierre

April 29, 2011 @ 5:23 am

There is a link to the DK600 schematics here: http://home.tiscali.nl/~smeyer/siel/opera6.htm near the bottom of the page.

The DK700 uses the same CPU and Voice boards, with one or two components left out. It adds a MICRO board with a second processor for the master keyboard functions.

JP

March 30, 2011 @ 1:50 pm

Desperately need full schemos for a DK700, I hope that one will be available soon, if so please keep me posted. I'll check this page often. Thanks!

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