alphaspeech µ (pronounced alphaspeech micro) is the world’s smallest speech recognition system. It includes state-of-the-art speech recognition and AI technologies (Deep Neural Networks), which are highly optimized to be able to run on platforms with very low resources. A low-power voice solution is easily developed with the use of RE01.


  • Unlimited vocabulary, up to 64 words or phrases at the same time
  • Available languages: English, German, Japanese (other Languages additional costs)
  • CPU clock: 32MHz, FLASH: 50kB (43kB program, 7kB ASR model), RAM: 17kB (12kB statics, 3kB heap, 2kB stack)
  • Energy harvesting platform: < 0.6mA using the Renesas RE01


  • Household appliances
  • Wearables, smart watches, etc.
  • Toys
  • Smart home


Title language Type Format File Size Date
star LINGUWERK alphaspeech µ for the Renesas RE Partner Solution 日本語 Product Brief PDF 445 KB

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Linguwerk GmbH External Link Jun 7, 2021