29 lines
1,012 B
Markdown
29 lines
1,012 B
Markdown
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# SD Player
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We just play a mp3 file (using the Arduino SD library) and output the result via I2S to an external DAC.
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An ESP32 was used to test this sketch.
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### External DAC:
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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
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DAC | ESP32
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VCC | 5V
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GND | GND
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BCK | BCK (GPIO14)
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DIN | OUT (GPIO22)
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LCK | BCK (GPIO15)
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FMT | GND
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XMT | 3V (or another GPIO PIN which is set to high)
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- DMP - De-emphasis control for 44.1kHz sampling rate(1): Off (Low) / On (High)
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- FLT - Filter select : Normal latency (Low) / Low latency (High)
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- SCL - System clock input (probably SCL on your board).
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- FMT - Audio format selection : I2S (Low) / Left justified (High)
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- XMT - Soft mute control(1): Soft mute (Low) / soft un-mute (High)
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