Q1: I changed the configuration file to a new trigger mode. The default trigger mode is still used, instead of the new trigger mode.
A1: Make sure your computer is not set to hide the file extensions. Your file is incorrectly named "read.cfg.txt" instead of "read.cfg". Uncheck "hide extensions for known file types" under "folder options" and rename your config file to "read.cfg"
Q4: How do I adjust the volume of the board?
A4: All you need is a small star point screwdriver. The onboard potentiometer used to adjust the volume is the small blue square just next to the headphone jack. Turn clockwise to increase volume. Turn anticlockwise to decrease volume. This potentiometer only controls the onboard amplifier. It does not control the 3.5mm audio jack volume.
Q7: Is the square potentiometer able to be used to adjust the volume for the audio output from the headphone jack as well?
A7: No, the headphone jack gives an audio signal only to an external amplifier/active speaker/headphone. The volume adjustment relies on the connected devices.
Q8: What bitrate must the MP3 file be?
A8: 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.
Q9: What sampling rate must the .WAV file be?
A9: 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.
Q10: I used an Apple Mac to copy the 4 sound files to the MicroSD card or onboard flash memory. Now only 3 (or less) of the 4 buttons play a sound when activated
A10: We found that some versions of the MacBook hide some of the files when they are copied to the onboard flash memory. The solution is to reformat the onboard flash memory, using a Windows computer and then copy the sound files to the microSD card or onboard flash memory using a Windows computer. (Also see Q13)
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 different cable.
Q12: The .wav file has an audible "click" when finished playing on the module. However, there is no "click" when I listen to the file on my computer.
A12: We converted the frequency of the files from 22.05KHz to 44.1kHz and the "click" disappeared. The "click" also disappeared when we converted the files from .wav to .mp3 format.
Q13: The sound files that I put onto the module won't play when using a Mac to add the sounds onto the device.
A13: 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
Q14: I loaded only 3 sounds on buttons 1, 3 and 4, but during playback, the sounds play from button 1, 2 and 3 instead of button 1, 3 and 4.
A14: The boards read files according to physical index order, so if there are only 3 files placed (no matter what names they are), they will play back on button 1, 2, 3. If you, for example, don't want playback on button 2, you need to place 4 files one by one in sequence, and when you use the board just disregard the 2nd button (don't hook a switch up to it) since you don't need that one for playback.
Q15: I am using a turbo charger brick to power my device and it starts a sound but stops immediately.
A15: When using a turbo charger (5v 3a) it is designed to stop charging the device when it is fully charged, since the FN-T418 uses such little power it tricks the power brick into thinking it is a charged device hence cutting the power to the device.