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Epson’s newly developed S1V3F351 and S1V3F352 audio playback LSIs are now available for shipping


Seiko Epson Corporation has developed and is now shipping samples of the S1V3F351 and S1V3F352 audio playback LSIs equipped with a buzzer sound function, flash memory for audio data and built-in oscillation circuit. Epson plans to produce 200,000 of these new LSIs per month.

Epson exhibited these LSIs at CEATEC 2023 held in Makuhari Messe, Japan.

In addition to the growing popularity of water heater remote controls, home appliances and other devices equipped with audio functions, the use of audio alarms and guidance is also expanding in health equipment, office buildings and factories. Customers can easily embed audio playback functions into their existing products used to play that audio simply by connecting these LSIs to a serial interface.

To date, even higher priced speakers are used to equip audio playback functions to various devices because inexpensive, regular buzzers have not provided sufficient audio quality and acoustic pressure.

Epson has therefore developed these LSIs with audio and melody playback with a buzzer by using an originally-developed audio algorithm.

End users can set the audio to make it easy for them to hear it using a real-time audio speed and pitch adjustment function (S1V3F351 only). In addition, the 2-channel mixing functions make it possible to simultaneously play background music and audio, enabling customers to provide empathetic audio guidance.

The use of a high-compression and high-sound quality algorithm reduces the amount of memory needed to store audio data and makes it possible to install both multiple languages and a large library of background music. Epson also provides a voice creation PC tool that supports 12 languages and allows users to easily create multilingual voice data without requiring studio recording as a voice data development environment. Users can also use existing Waveform Audio File Format (WAV) data.

Epson will continue to help customers further improve the performance of their products and contribute to smart social infrastructure based on its philosophy of efficient, compact, precise innovation aimed at saving energy, saving space and delivering exceptional precision.

Product Features

Integrate a variety of audio playback functions

  • Audio playback with electromagnetic buzzers and piezoelectric buzzers that can equip audio playback functions even into low-end products
  • Voice speed and pitch conversion functions (adjustable in 5% steps between 75% and 125%) that enables each end user to adjust the audio as required
  • 2-channel mixing audio playback (for playing background music + voice) that produces a sense of empathy
  • Sampling rate of 15.625 kHz, which is high enough for background music as well as voice
  • Equipped with a high-sound quality and high-compression algorithm that supports multiple languages and a large library of background music
  • 2. Easily equip voice guidance functions into existing systems
  • Simple host CPU serial interface
  • Stand-alone mode that allows control without a host CPU or with only the GPIO of the host CPU

Easily create voice data with Epson’s voice creation PC tool

  • Studio recording is not needed; the PC tool is all that is needed to create voice data (support is provided for 12 languages)
  • Americas: American English, American Spanish and Canadian French
  • Europe: British English, German, French, Spanish, Italian and Russian
  • Asia: Japanese, Chinese and Korean
  • Voice guidance is enabled by transferring the voice number on the PC tool via the serial interface
  • Audio data (WAV format) possessed by the user can be easily imported into the PC tool

Comes with an easy-to-use evaluation board

  • Designed to easily connect to the host CPU
  • Easily write voice data created by the customer
  • Comes with a stand-alone control button that enables audio to be easily evaluated without the need for a host CPU connection
  • Equipped with external QSPI-Flash

For more information, please visit http://www.epson-electronics.de.