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arduino-audio-tools/examples/examples-stream/streams-sd_mp3-i2s
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pschatzmann fdf7394117 Remove unnecessary addNotifyAudioChange
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README.md Fix broken img links 2023-03-05 23:33:59 +01:00
streams-sd_mp3-i2s.ino Remove unnecessary addNotifyAudioChange 2024-03-02 08:18:10 +01:00

README.md

SD Player

We just play a mp3 file (using the Arduino SD library) and output the result via I2S to an external DAC.

An ESP32 was used to test this sketch.

External DAC:

DAC

I am just using the default pins defined by the framework. However I could change them with the help of the config object. The mute pin can be defined in the constructor of the I2SStream - by not defining anything we use the default which is GPIO23

DAC ESP32
VCC 5V
GND GND
BCK BCK (GPIO14)
DIN OUT (GPIO22)
LCK BCK (GPIO15)
FMT GND
XMT 3V (or another GPIO PIN which is set to high)
  • DMP - De-emphasis control for 44.1kHz sampling rate(1): Off (Low) / On (High)
  • FLT - Filter select : Normal latency (Low) / Low latency (High)
  • SCL - System clock input (probably SCL on your board).
  • FMT - Audio format selection : I2S (Low) / Left justified (High)
  • XMT - Soft mute control(1): Soft mute (Low) / soft un-mute (High)