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O'Tool Plus

Otool PlusThe new and improved Jones O'Tool Plus oscilloscope and audio tools eurorack module from Dave Jones Design was in development for almost two years. It was finally released in June 2016.

A greatly improved version of the original O'Tool module, with temperature stable readings, extreme accuracy, added modes, upgradability, and more.

  • Single channel oscilloscope
  • Dual channel oscilloscope
  • 3D oscilloscope
  • X/Y display
  • Level meter
  • VU meter
  • Peak meter
  • Voltmeter (with p-p and average DC)
  • Frequency meter
  • Tuner (guitar tuner style)
  • Linear spectrum analyzer
  • Log spectrum analyzer
  • Spectrogram
  • BPM meter
  • Metromome

It includes user configurable settings and can remember settings at power up for three users. That means you can have different settings for home, studio, and performances, or any three different sets of settings.

It is temperature stable and extremely accurate. It can monitor two signals, with inputs looped through to other modules. The scope modes include an external trigger option.

It is firmware upgradable. It has a jumper for internal or external 5 volt source. It has an expansion connector for possible future add-on modules.

Power requirements:

80ma +12v
22ma -12v


12ma +12v
70ma +5v
22ma -12v

Width: 8HP
Depth: 40mm

Suggested US retail price: $325  (prices overseas will be higher due to international shipping, import duties and taxes, and other international costs)

otool screens 1
otool screens 2

It is currently in stock at dealers worldwide.
Quickstart Guide User Manual Previous Versions
Quickstart   UserManual  

The instruction sheet for the original version of the O'Tool (before the "Plus") is available here


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