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Page: External TDM DACs
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Audio Boards Audio Effects Audio Input and Output Audio Metadata Audio Sources and Sinks Communication Converting the Data Format Converting the Number of Input and Output Channels DSP Libraries Design Principles Determining the Volume Encoding and Decoding of Audio Equilizer Examples External ADC External DAC External TDM DACs FFT Faust Filters Home Interactive Audio Introduction It's not working Jupyterlab Low Latency Streaming of Audio MemoryStream: Converting a File to Flash Memory Multicore Processing Optional Libraries Performance Pipelines Pitch Shifting Project Status Propagation of Audio Format Changes Pure Data Resampling Running an Audio Sketch on the Desktop Splitting and Merging Audio Supported Architectures Supported Scenarios TensorFlow Lite MicroSpeech Tensorflow Lite Audio Output The Audio Player Class Using the Framework w o Arduino Using the Project as library with cmake Vector, Allocators & PSRAM Volume Control Working with PlatformIO Writing your Custom Input&Output Class
29 External TDM DACs
Phil Schatzmann edited this page 2024-04-02 15:19:08 +02:00
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Regular I2S DACs support only 2 channels. With TDM we can get much more channels. However you need to use a microcontroller that supports TDM!

This is not yet supported by the AudioTools, but I am working on it. Please let me know if you want to help me...

CS42448

The CS42448 CODEC from Cirrus Logic provides six multi-bit analog-to-digital and eight multi-bit digital-to-analog delta-sigma converters.The DAC is configured with the help of I2C.

1 2 3 4 5
NC SCL SDA NC NC
GND NC NC 5V NC

         Master Control

The SPI pins are provided via the Master Control. Unfortunatly the pins are not indicated, so I am documenting them here. SCL is on the colum 2 and SDAa on colum 3 of the first row, if you position the board so that the master control is on the top.

image

AD1938

The AD1938 is a high performance, single-chip codec from Analog Devices, that provides four analog-to-digital converters (ADCs) with input and eight digital-to-analog converters (DACs) with single-ended output. An SPI port is included, allowing a microcontroller to adjust volume and many other parameters.

Configuration

Unfortunately this board does not make the SPI pins available, but you can configure the device with the help of the SIP3:

image

To use DTM at 48000, just remove the bridge.

Pinout

image