How to record and use a sound effect for Thymio?

Recording from a computer

Makes sure to have a micro SD card that you can connect to your cmputer and that is compatible with Thymio. Avoid cards that are too big or too fast. Prefer a size of 2 Go, max 4 Go and do not choose SDHC or SDXC.

First, start Audacity. Once the app has started, create a new project and change the default value (arrow 1 on the image) of 44100 Hz to 8000 Hz. Use only one track by selecting 1 recordign channel (arrow 2 on the image).

You can now record your sound with the record button (arrow 3 on the image). You should see the cursor moving and the soundwave visualization. Once your sound is done, click stop (arrow 4 on the image).

Before exporting the sound, check that the metadata of the file are empty. Click on the Edit menu (arrow 5) and then metadata (arrow 6).

Once the window is open. if data are written under Value, erase them by clicking Delete (arrow 7), then Validate.

You can now export the sound file. Click on the File menu (arrow 8), Export (arrow 9) and then Export as WAV (arrow 10).

Name your file in the following way: P followed by a number. For example P0.wav (the number after P lets you find the your sound when you program), select the file type Other non compressed formats (arrow 11).

Under Format Options, choose WAV header (Microsoft) and under Encoding choose Unsigned 8 bit PCM.

Save the file to the SD card.

You can also find this procedure in an explanatory video by following this link.

Play the SD card sound onThymio

VPL3

USe the customizable mode (arrow 14). Select the blocks related to the SD card (arrows 15 and 16) and close the configuration panel.

Use block 15 to play your sound, the arrows allowing you to select the right number. Block 16 stops the playback.

Aseba

Use function sound.play which takes as a parameter a recoding number between 0 and 32767. To interrupt the playback, call sound.play with the parameter -1.

Scratch

In code, category Thymio block jouer son carte SD ().

Recording sound directly from the robot

Scratch

In code, then Thymio, you will find the block enregistrer son () which allows to record sound. To stop recording, use arrêter l'enregistrement du son and to replay a sound use rejouer son ().

Aseba

You can record sounds to the SD card unsing native function sound.record which takes a recording number from 0 to 32767 as a parameter. The file is then saved to the SD card under the name Rx.wav, where x is the paraeter given to the function sound.record. To stop recording, call sound.record with -1 as argument.

You can then replay the recorded sound with the native function sound.replay . As a parameter, this function takes a number from 0 to 32767 and replays file Rx.wav from the SD card, where x is the parameter passed to the function sound.replay . To stop the playback, call sound.replay with -1 as argument.