36 lines
1.1 KiB
Markdown
36 lines
1.1 KiB
Markdown
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# Stream I2S Input to CSV Output
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## General Description:
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We implement a I2S source: We stream the sound input which we read in from the I2S interface and displays it on the Arduino Serial Plotter.
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We can use any device which provides the sound data via I2S. In this case it is a 'I2S ADC Audio I2S Capture Card Module'
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Usually you do not need any master clock, but unfortunatly we need to feed this module with a master clock signal from the ESP32, if
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the ESP32 is acting as master.
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## Pins
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| i2s-ADC | ESP32
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| ---------| ---------------
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| MCCLK_IN | RX_0 (GPIO3)
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| BICK | BCK (GPIO14)
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| DATA | IN (GPIO32)
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| RLCLK | WS (GPIO15)
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| GND | GND
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| MUTE | -
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| VCC | VIN 5V
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## Additional Comments
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I recommend this sketch as a starting point for all I2S input. Just leave the masterclock out, because this is not needed for most input devices.
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If it is working with 32 bit you can try to change it to 16bits which most of the time works as well:
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- CsvOutput<int16_t> csvOutput(Serial);
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- cfg.bits_per_sample = 16;
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see streams-12s-serial_16_bit |