echolocation speaks from audio files on a microSD card. You can replace any of those files with your own recording if you want a key to say something different - for example a preferred wording, language, or voice.

Where the files live

Speech files are in an audio folder on a FAT32 microSD card. Remove the card from the device and insert it into a card reader, open that folder on a computer, then put the card back and reboot when you are done.

Replacing a sound

1. Find the file for the key you want to change (for example a.wav or space.wav).
2. Keep a copy of the original somewhere safe (another folder on your computer, or a backup drive) so you can put it back later if you change your mind.
3. Record your replacement sound.
4. Save it with the exact same file name as the file you are replacing.
5. Use the same format as the existing files (WAV). Match the existing encoding as closely as you can so playback stays reliable.
6. Copy your new file into the audio folder, replacing the old one.
7. Eject the card safely, insert it into echolocation, and reboot. Press the key to test.

File name and format matter

echolocation looks up sounds by file name. If the name does not match exactly — including spelling and .wav extension — that key will not play your recording (and may stay silent).

The format should match the files already on the card. Keep replacements as WAV files in the same style as the originals. If a new file will not play, compare it with an original file and export again to match.