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OpenTX Sound Packs

Sound files for OpenTX generated using Mac voices.




Starting with OpenTX 2.2 sound packs are provided with a version file. The firmware checks for this sound file and if it does not exist or if it is incorrect the a warning is displayed.

If the sound pack version does not match the version expected by the firmware spoken units of measurement may be incorrect.

Version File


  • A text file which can be opened using a simple plain text editor.
  • Contains a single line:


Using the sound packs

  • Tx SD CARD > Remove or rename the SOUNDS directory.
  • Download the sound pack.
  • Unzip the downloaded file.
  • Copy the SOUNDS folder and the opentx.sdcard.version file to the SD CARD