TM4-S is our standard model with unique patented functions TOTTER MIDI GUITARIST® and  ACTIVE CHANGE® of instruments. It is built on the left and right sides of the accordion.



  • for left and right hand sides
  • control panel
  • 50 internal memory locations
  • dynamics adjustable for each track separately
  • electronic sensors of keys and bellows
  • possible to upgrade to TM4-LUX model
  • possible to upgrade the TOTTER MIDI microphone system
  • contains an interface board, control panel, sensor pack, connection cables, manual



The TM4-S is our standard model built on the left and right sides of the accordion. We recommend it to anyone who may be missing the unique patented TOTTER MIDI QUINTET® function, but not anything else.


It is the world’s only MIDI system with the patented functions TOTTER MIDI GUITARIST® (enables you to sound the chord by simply playing the bass) and ACTIVE CHANGE® of instruments.


With the grille mounted control panel, the use of the TM4-S model is combined with the movement of your fingers when playing the accordion.


You can save your own settings in the internal memory with 50 programs. Using these programs, it is possible to recall the desired settings quickly, even while playing. You will be impressed with the dynamics capability and extraordinary responsiveness of a TOTTER MIDI system. You can perform with the ACTIVE CHANGE® of instruments when you are playing live or with automatic accompaniment.


To operate the TM4-S model built into the accordion, you need a sound generator, for example, sound module (SONATTER TM4), synthesizer, keyboards, computer, … and active speaker.


Make sure on your own ears!


You can test all our products yourself!


DOWNLOAD brochure MIDI in pdf
DOWNLOAD brochure Base in pdf



Need more information? Please contact us.

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