Release note - MicroPlayer firmware

Modified on Tue, 18 Aug at 10:57 AM

TABLE OF CONTENTS

Version History

Version History

Firmware Version 1.5

September 2018

Added support for the WAVE_FORMAT_EXTENSIBLE format, enabling proper playback of WAV files with Broadcast Wave Format (BWF) metadata.
Added support for a proprietary audio format for "obfuscated" MP3 files (Contact us: support@wsystem.com), which protects MP3 audio content.
Made the player tolerant to hidden macOS files.
Added RS-232 protocol commands for next folder, previous folder, volume up, and volume down.
Added the NEXT_FOLD and PREV_FOLD parameters to the list of commands assigned to input contact combinations, special buttons on the infrared remote control, and the player's front panel via the configuration file (config.txt).
Improved compatibility with USB drives.
Improved playback of MP3 files containing metadata or erroneous MP3 frames.
Optimized the audio engine.
Fixed a bug causing audio "clicks" during playback.
Fixed a bug that swapped the left and right audio channels for certain files.
Fixed a bug causing unwanted pulses on dry contact outputs during transitions between files or folders.
Fixed minor bugs.

Firmware Version 1.3

November 2015

Optimized the infrared input.

Firmware Version 1.2

November 2014

Added a new folder tag [WHL] (While), indicating that the folder plays as long as the trigger input is held.
Added a new folder tag [NXTxxx] (next xxx files). The xxx parameter ranges from 001 to 999. Plays the next xxx files in the folder before stopping or exiting the folder based on the end tag specified in the folder name.
Added the ability to combine inputs progressively.
Improved startup and trigger response time.
Removed a slight stuttering effect at the beginning of playback for certain MP3 files.
Fixed a bug preventing the execution of folder tags [RLxy] or [RSxxx] when file tags [DT] or [Jxxx] were used, or when an infrared or RS-232 command interrupted folder playback.
Fixed a bug causing incorrect parameter settings despite the presence of the config.txt file after the player woke from power-saving mode.
Fixed various bugs in the management of volume tags [V+xx] and [V-xx].
Fixed the folder tag [RET], which was being ignored.
Fixed minor bugs.

Firmware Version 1.1

May 2013

Fixed a bug generating a pop noise when interrupting audio file playback using FOLDERXXX, NEXT_FOLDER, PREV_FOLDER, or STOP functions.

Firmware Version 1.0

March 2013

First final version.

Installation

The player's logic and features are defined by an internal program called firmware. This program may evolve to add new features, modify the player's operation, or provide fixes. The firmware can be updated or replaced by following these steps:

Download the firmware from our website.
Ensure the SD card is formatted in FAT32 (USB drives are not supported).
Copy the MPMK2.bin file to the root of the SD card.
Remove the SD card using the operating system's ejection process.
Power off the player.
Insert the SD card into the player and power it on. Do not remove the SD card or turn off the player until the installation is complete. Wait for the player to fully restart.
The firmware update is complete. Turn off the player and remove the SD card.

Note: The firmware update is performed using an SD memory card. Firmware updates are not supported via the player's USB port (USB drive).

Known Issues

The read and write speed of USB drives is slower than that of SD/SDHC cards. If there are many audio files, this can cause significant slowdowns when starting the player. In such cases, it is recommended to use an SD/SDHC card instead of a USB drive.