Bastl Instruments Intros Trinity Line Of Modular Grooveboxes


New Czech instrument maker Bastl Instruments has introduced Trinity, a new line of inexpensive modular grooveboxes.

Here’s what they have to say about the Trinity modules:

Trinity is a universal musical instrument and original sounding modular groovebox. It can function as any type of digital synthesizer, sequencer, controller, arpeggiator or almost anything that can be programmed into a micro-controller.

Trinity is designed to be connected and combined with other Trinities of different functions in a chain, so you can create your own music making environment. It is ready to communicate with the outer world via MIDI and different sync and CV methods using MIDI Bastl.

We have developed 4 different instruments for Trinity which work great together. They are sequencer, drum synthesizer, polyphonic synthesizer and monophonic FM synthesizer.

All Trinity instruments have the same starting price: 60 Euro for assembled instruments and 45 Euro for a DIY kit. And they’re open-source, DIY, hackable and repairable.

Here’s a playlist of demo videos:


  • simple interface which makes it playable musical instrument
  • available assembled or as a soldering kit
  • MIDI native (note,CC) , MIDI jack and almost endless sync possibilities by MIDI Bastl
  • software reprogrammable by Arduino (breakout for standard FTDi USB)
  • hardware expandable and hackable – including breakouts for sensors or more buttons
  • chain connectors to share power, audio and communication within more Trinity/Bastl instruments
  • user memmory for storing presets and patterns (exportable, transferable)
  • stylish lasercut replacable enclosure with instrument labels
  • adjustable volume
  • mono, 16385 hz, 14 bit – double PWM sound generation
  • TRS Jack 3.5mm audio output able to drive headphones
  • powered from 9V battery or 9V positive polarity power supply (2.1 mm) or from the Trinity chain (use switch to select)
  • running Mozzi library and Bastl library for Arduino

Here’s the developers informal demo video:

See the Bastl Instruments site for full details.

Check out the specs and demos and let us know what you think of the Trinity modular grooveboxes!

14 thoughts on “Bastl Instruments Intros Trinity Line Of Modular Grooveboxes

      1. According to their website, you only need one power supply as well. Very interesting. It also says the sequencer can power up to 3 at a time. If you have 2 sequencers I wonder if that will allow more ambitious users (not me) to control 6

  1. just ordered the poly. been looking at their other units for a while, but these are low cost enough to go for it. sounds great for sampling, processing and droning….should be fun for spring.

  2. Why don’t these little mini modular kits that are coming about just have the connectors as 1/8″ jacks on the front like normal modulars, it’d be much better for connecting to other equipment and it shouldn’t cost much more to make the product much more enticing.

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