When the Multi-Trak power is cycled, this parameter is reset to 0 (SCI scale factor). There are 5 settings for this:ġ6-31: Osc env has 2X the effect of the SCI codeģ2-47: Osc env has 4X the effect of the SCI codeĤ8-63: Osc env has 8X the effect of the SCI codeĦ4-79: Osc env has 16X the effect of the SCI codeĨ0-127: Mapped in the code to a value of 64. He wanted a way to increase the effect of the oscillator envelope. The Osc Env Scale Set CC was added at the request of Ryan (AKA plutoniq9). The Six-Track does not have these, so I assigned them myself: Supports CC control of the following parameters: (The CC codes were chosen to match the Six-Track so that existing control software could be used) I now have a new version of the code, which I am calling V2.3, that has the following features: This has been very useful for learning how the code works, what RAM locations store what values, etc. Basically anything I want to see anywhere in the synth, including inside the combo chip or the Z80. I can see the pitch, VCA setting, VCF setting, etc of each voice. I created a Verilog simulation of the Multi-Trak which allows me to press (virtual) keys or switches, receive MIDI messages, etc, and watch how the code reacts. I also wanted to put the factory patches in the EPROM, so they could be restored easily if lost. Since I had some familiarity with similar code in the SCI Max from another project, I decided to see if I could add this feature to the Multi-Trak. This seems a little odd, since the Six Track and the Max both have this feature, but possibly SCI at the time didn’t feel it would get much use, or maybe they just didn’t have room in the EPROM for the code. Last year it was brought to my attention that the Multi-Trak didn’t support CC parameter changes over MIDI. ::: Sequential Circuits/SCI Multi-Trak Page Tuesdays are "Synth Potluck" - where we will feature neat and assorted synths by manufacturers who do not have their own featured day.I’m so excited i quoted the whole page from the Tauntek site! The same site that posted the SCI MAX upgrade i documented here: Synthfind features a particular synth manufacturer on each day of the week. ”Ĭlick here to search for synths on eBay Categories MultiTrak, Sequential Circuits The aftertouch has the perfect sensitivity. Works as a great controller for other synths. Sounds soooooo good! For a vintage synth you’ll only find this kind of feature in the CS-80 or Rhodes Chroma to my knowledge. This is the most expressive keyboard ever! The aftertouch is poly-aftertouch, so each key has individual modulation instead of channel aftertouch like most other keyboards where it affects all voices the same at once. One of the original knobs is also missing it’s silver cap, so it’s just pure black. and the silk screening has rubbed off in some places along with some paint on the back.Īlso, two of the original knobs were missing, so I replaced them with similar looking knobs. Physically it is a bit worn looking The wood side panel has a large chip on the corner as you can see in the photos. Everything else works perfectly but it is old, so it is being sold as is, no returns. “Tunes up, and all of the keys work great, including the velocity/aftertouch. ” Click here to visit listing on eBay Categories MultiTrak, Sequential Circuits all the buttons function perfectly – see the video below which shows that issue.Įven though this looks to be in great working condition, I haven’t a clue how to test all the myriad of features so am selling this as is only as I am not a keyboard geek.Īlso comes with original soft case, which has stains on it. probably just needs a screw tightened inside on that section of circuit board. The circuit board that the buttons in the “Track” section are connected is loose, just on the left hand side, so when you press the buttons, they sink down a bit. Good cosmetic condition and all the keys play and register nicely. This comes with the original power supply which has been modified with its own off and off switch – not sure why as the switch on the keyboard works just fine. This is from around 1985, and have a video below playing it and seems to play great. “See below for youtube link for video on this synth!
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