December 2018
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SBC-1324 Vintage and Modern 13 and 24 Input/Output Converter

SBC-1324 Vintage and Modern 13 and 24 Input/Output Converter

Features and Specifications:

  • Inputs: 24 and 13 pin Roland Guitar Synthesizer Inputs
  • Outputs: 24 and 13 pin Roland Guitar Synthesizer Outputs
  • Control Voltage Sources: Generates controls voltages 11,12, 13 and 14: Filter Cutoff, Resonance, Pitch and Vibrato (LFO)
  • Audio Source: Normal Guitar Signal and (Internal or External) Hex Fuzz
  • Mode Control: Vintage Mode Control - Modes I, II and II
  • String Level Adjust: Vintage Mode Control - Modes I, II and II
  • Additional Outputs: Direct Guitar (Tuner) out, Hex Fuzz Out
  • Additional Inputes: GK 13 S1/S2 and Balance Control, CV Inputs and Master Level Control

Introduction to the SBC-1324:

SBC-1324

Back in 2009 I was approached by a very talented Canadian guitarist who wanted to be able to control both vintage Roland 24 pin GR-series synthesizers and modern Roland 13 pin GK-series synthesizers with one guitar, either a 13 or 24 pin guitar.

The SBC-1324 is the unit I built to meet this need. The unit has both 13 and 24 pin inputs, and a master analog switch to select between the two. There are six amplifiers for each string input, used primarily to boost the 13 pin signals to the 24 pin format, but they can also be used individually to amplify any single string input, whether 13 or 24 pin.

The unit also generates all the control voltages, plus hex fuzz, needed for the vintage Roland GR-series. For each control voltage, there is a switch to select from the signal coming from the guitar, or the internal control voltage.

In additional, there are control voltage inputs on the back for all four vintage control voltages, so that an external pedal, like the Moog MP-201, can be used as a control modulator. To top it off, an external control pedal can be used as the master control for each control voltage.

This was a one-off project, all hand-wired using perf boards and point-to-point wiring. To illustrate how to use the unit, I made several videos (shown below) that step through all the features.

Photos - SBC-1324 :

SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter
SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter
SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter
SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter
SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter
Click on any image for larger view.

Videos:

Photos - SBC-1324 - Interior:

SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter
SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter SBC-1324 Roland 13 and 24 Pin Converter
Click on any image for larger view.