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GPSTAR
Audio XL
Instruction Manual


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Summary of Contents for GPStar Audio XL

  • Page 1 GPSTAR Audio XL Instruction Manual
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  • Page 2: Key Features

    Overview GPStar Audio XL is a polyphonic audio player capable of playing up to 14 stereo WAV files at the same time. Polyphonic playback gives you the ability to play multiple audio tracks simultaneously and is crucial for creating realistic and immersive audio experiences. By giving creative freedom for sound designers, GPStar Audio XL can layer numerous tracks over each other to create an intricate realtime experience.
  • Page 3: Hardware Specifications

    Hardware specifications GPStar Audio XL is powered by an STMicroelectronics STM32F405 Arm Cortex M4 MCU unit clocked at 168 MHZ with up to 1 MByte of flash memory and 192 KB of system ram. Meanwhile the audio output is handled by a Texas Instruments LM49450 Class-D Stereo amplifier with 2.65W per channel.
  • Page 4 ** The on-board stereo amplifier is capable of powering either a 4Ω 2.5W or 8Ω 1.25W speaker at 5V from each channel. *** Do not supply the board with multiple different power sources at the same time. GPStar Audio XL Page 4...
  • Page 5 Preparing your audio files GPStar Audio XL plays audio from uncompressed WAV files from a MicroSD Card of any size formatted as FAT32. Please note that MicroSD cards larger than 32GB often come formatted in exFAT. Please reformat these cards as FAT32 using 32KB block size. Mac and Linux users can format normally with their standard disk utility software.
  • Page 6: Powering The System

    The easiest and recommended way to power GPStar Audio XL is with any standard 5V USB-C power supply. You can also power GPStar Audio XL from the 5V pin along the UART connector near the top of the board. This is ideal when using GPStar Audio XL in serial mode to control audio playback.
  • Page 7: System Configuration

    = -25 A example configuration file can be downloaded from the gpstartechnologies.com support and downloads page. When no configuration file is present on the Micro SD Card, then GPStar Audio will revert to all the standard default settings. System configuration [gpstarconfig]: This area can set the general settings of the board.
  • Page 8: Serial Control Mode

    Up to 20 are available. Serial control mode The most common way to control GPStar Audio XL is over the serial interface which allows fully control such as start, stop, pause, cross fading, volume control and many more features on each individual channel.
  • Page 9: Updating The Firmware

    FTDI 5V TTL device or with the GPStar Programming cable available from gpstartechnologies.com While the power is off to your GPStar Audio XL, set the switch at the top right corner of the device from BOOT to LOAD. Then connect the device to your computer and open the GPStar Audio Flashing utility.
  • Page 10 www.gpstartechnologies.com Rev 1.0...

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