Hi,
I'm trying to recording audio @8khz with the USB eval board. it basically works but if i analyze the waveform it looks strange , the first secs seem to have a bias . The mic is connected to mikrobus pins miso and SPSI_clk : according to schematic there is no pull up resistors on these ones.
the recording is based on DMA channel and SampleRateConverter.
any tip is appreciated!
Thanks
Marco
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嗨garzola,
Thanks for your post, but the audio is not supported from the DA1468x SDK yet, so I am not able to provide you any guidelines for your issue. Although, I will ask the Team and I will get back to you as soon as possible.
Thanks, PM_Dialog
谢谢你的支持,我really appreciate.
I used if_pdm module in your sdk by the way , even if not still supported officially.
Marco
嗨garzola,
Could you please clarify what you are trying to accomplish? We need to get a bit better understanding of what you want to implement. Are there any specific latency requirements and which is the source? Please, provide us more details about your application.
Thanks, PM_Dialog
Yes,
the goal is to stream audio. I got it running but I have noise in the first secs and I guess is something related to the behaviour I described above.
seems pretty odd to have this RC waveform after SRC has been started.
Marco
Hi Garzola,
Can you share more details about your setup. Which mic do you use and and how do you supply it? Would it be possible that the noise comes from uniitialized buffers?