Q1: What bitrate must the MP3 file be?
The module supports bit rates of 32 Kbps, 64 Kbps, 96 Kbps, 128 Kbps, 256 Kbps and 320Kbps for MP3 files. Other bit rates for MP3 files could cause problems with playback.
Q2: What sampling rate must the .WAV file be?
The module supports sampling rates of 8 / 11.025 / 12 / 16 / 22.05 / 24 / 32 / 44.1 or 48 KHz for .WAV files. Other sample rates for .WAV files could cause problems with playback.
Q3: The sound files that I put onto my device won't play when using a Mac to put the sounds onto the device.
A3: Please see this link that a customer wrote up about a past sound module that they used and that they used the same information to get this version to work. Here Is a link to the article as well as the software that he mentions
Article - https://appleause.com/2010/09/29/ultraprojector-and-mac/
App - https://macpaw.com/cleanmydrive
Q11: My computer isn't recognizing the board when I plug it into my computer
A11: Some micro USB
cords can only transport power through them, so it is important to make
sure the cable can transfer both power and data. In other words, some
cables are only good to charge devices, but cannot communicate with
them. First thing to do is test if the cable can not only charge, but
also communicate with other devices such as a phone, if not try a