Frequently Asked Questions |ROHM Semiconductor

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What types of audio data can the Lapis speech synthesis LSI replay?
- Please load the WAV file into the Lapis original tool Speech LSI Utility and convert it to data for speech synthesis LSI. You can replay the sound code data generated here.

Is there a product equipped with a recording function?
- There is no product equipped with a recording function in LAPIS speech synthesis LSI.

Is there anything to consider when operating the master clock frequency at 4MHz?
- When creating sound code data with Speech LSI Utility, select 4.000MHz as the master clock frequency (fosc).
  This setting adjusts the sampling frequency to match the master clock frequency.
  Related Products: ML22530/Q53x, ML22660/Q66x

Is it possible to select the Speech synthesis algorithm for each playback phrase?
- The Speech synthesis algorithm can be selected for each phrase.
  Please select when creating sound code data with the Speech LSI Utility.

Please tell me how to raise the volume with SDCB Controller.
- You can adjust the volume with "ChVol" and "Volume".
  "ChVol" is equivalent to the CVOL command, and "Volume" is equivalent to the AVOL command.
  Related Products: ML22420/460, ML22530/Q53x, ML2256x/Q563, ML2257x/Q573, ML22594, ML22660/Q66x, ML2272x/76x, ML2282x/86x, ML22Q553

What is the bit precision of voice data that can be read into the Speech LSI Utility?
- For RIFF Wave files (* .wav), the bit precision corresponds to 16bit or 8bit. It does not support 24bit.
  Please refer to "2.3.1. Input Files" of the Speech LSI Utility User's Manual for the readable format.

Please tell me how much memory size the original sound data to be used will be in the speech synthesis LSI.
- The memory size of the speech synthesis LSI depends on the playback time, the number of phrases, the sampling frequency, and the playback method.
  In the speech synthesis LSI on our homepage, there is a page in the user support selection guide that inputs sound data information and calculates the required memory size, so please try it.

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