Long Division II: Six units in stock.
In addition to the complete polyphony of the original Long Division module, Long Division II has the following upgrades:
A choice of square or narrow pulse waves, great for those string machine sounds!
A Gate Out jack, to trigger envelopes on any note coming on,
Internal illumination for the tuning trimmers, and
An optional stereo output!
So…what’s inside this thing?
There are four layers of circuit boards to make this happen. The basic outline is this: the Voice/Audio/Power board has the twelve master oscillators on it, along with all the divider chips to provide all the notes across the five octaves. After the notes are generated, they move on to the pulse wave convertor boards, where the waves are either left as square waves or turned into a very narrow negative going pulse. The waves then move on to the diode keying boards, which have inputs on the top and bottom. When a note is played, the signal is sent from the MIDI decoder, and shifted up to +12 volts (from logic level +5 volts), and fed into the bottom of the keying board. It then gates through the corresponding note coming in the top, and is sent to a summed output (the RCA jacks in the picture). This audio signal is then sent back to the Voice/Audio/Power board for mixing, tone control, and volume control, and finally the audio output jack on the front panel. Every single note has its own keying circuit which consists of five diodes, two capacitors, four resistors, and one field effect transistor. Every note also has its own individual pulse wave convertor circuit, consisting of one capacitor, four resistors, one diode, and two field effect transistors. Each board is built with 32 notes available, so you add all that up and you have 384 diodes, 192 capacitors, 512 resistors, and 192 transistors! That doesn’t even count the MIDI and Voice/Audio/Power boards…when you do everything in hardware and all analog, that’s what it takes.
As much stuff is in there, it’s all designed to be serviceable, as much as surface mount technology can be. The front panel is built separately and plugs on to the Voice/Audio/Power board:
Dimensions: Weight 771 grams (1.7 pounds), Width 213 mm (42hp), Depth 70mm …this unit is NOT skiff friendly, we want you to be aware of that.
Current consumption: +12 V: at idle 160ma, all notes being played at once approx. 560ma. +5V: not used, -12V: 1.5ma (not much, but it has to be there for the bipolar op amps used).
A few example videos:
The video below shows the unit being used in conjunction with the Stereo Break Out/Mixer module, which will be available shortly.
Price: $1,850.00 including shipping to the contiguous 48 states and Canada.
Please contact us for international shipping rates.
No it isn’t cheap but these things take an incredible amount of time to assemble and test. They are built by hand, one at a time, in our St. Albans, West Virginia facility. All but two printed circuit boards are made in the United States.