To adjust the volume of the speaker on the EZ-B IoTiny, you can use the "SetVolume" command in ARC. This command allows you to set the volume of the speaker to a value between 0 and 100. You can also use the "Mute" command to turn off the speaker completely. For more information on these commands, you can refer to the EZ-B IoTiny datasheet on the Synthiam website.

Thank you.

@smiller29 If you'd like you can also overdrive the EZ-Bv4 and IoTiny speaker with SetVolume(200);

Playing music with a lot of bass will be more clipped and distorted but it works with text-to-speech pretty good :)