# Customizing Waveform Transmission Using DAC Channel: Is AXI DMA Required?

**URL:** <https://discuss.pynq.io/t/customizing-waveform-transmission-using-dac-channel-is-axi-dma-required/7767>\
**Category:** Support\
**Created:** [November 25, 2024, 5:18am UTC](https://discuss.pynq.io/t/customizing-waveform-transmission-using-dac-channel-is-axi-dma-required/7767 "2024-11-25T05:18:37Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![joe052790](https://avatars.discourse-cdn.com/v4/letter/j/53a042/32.png) [@joe052790](https://discuss.pynq.io/u/joe052790)\
**Post date:** [November 25, 2024, 11:35am UTC](https://discuss.pynq.io/t/customizing-waveform-transmission-using-dac-channel-is-axi-dma-required/7767/4 "2024-11-25T11:35:11Z")

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I saw you doing something similar to me. I’m not sure if your project was successful?

> [@\[RF SoC 4X2\] DMA invalid address](https://discuss.pynq.io/t/rf-soc-4x2-dma-invalid-address/7121):
>
> Hi Everyone, I want to send a stream of complexes to another RF SoC 4x2 via analog waves. To do so, I want to send these complexes via the DAC port. I checked the notebook about RF converters: (https://github.com/Xilinx/RFSoC-PYNQ/blob/master/boards/RFSoC4x2/base/notebooks/rfdc/01\_rf\_dataconverter\_introduction.ipynb) But this notebook only configures the career signal, not the message signal. Thus, I added a DMA block in read-only mode to the base Overlay. First, I know that the PS is linked …

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