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TOPIC: Stereo out on I2S_OUT_0

Stereo out on I2S_OUT_0 4 months 3 days ago #33319

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My question is regarding the I2S_Out_0.

Is the I2S operating as Master or Slave?

Can I interface the I2S on miniStreamer to I2S_OUT_0?

In the RAW mode, the unit is advertising as a 8xIN (7 x MEMS + 1 x PDM input), 2 x OUT (Stereo out on I2S_OUT_0 / Pin J3.1). How to decode the audio recording for the 8 channels?
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Stereo out on I2S_OUT_0 3 months 4 weeks ago #33382

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@ Melitta

The I2S out is Master mode. Unfortunately we've never tested connected to miniSTREAMER...
How to "decode" audio of the raw mode? Do you mind to clarify what you mean? These are just PCM out on the 8 x IN inside your PC. No need to any decoding..

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Stereo out on I2S_OUT_0 3 months 3 weeks ago #33413

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@dev team

The User Manual stated "RAW mode: 8ch of audio (7ch coming from the MEMS microphone + 1 ch from spare PDM input) are available as raw audio (non processed)..... Note that in RAW mode, the UMA-8 will output the RAW signal from the MEMS without any digital gain ..........."

I would like to capture the raw audio of each microphones. How to capture the raw audio date? Can I use Audacity?
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Stereo out on I2S_OUT_0 3 months 3 weeks ago #33457

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Any multichannel software with support to ASIO will be able to record. We like to use Reaper.. Not sure about audacity support multichannel..
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Stereo out on I2S_OUT_0 3 months 1 week ago #33547

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I have no prior experience working on ASIO multi channel recording.

I have installed the ASIO4ALL V2.14 and Reaper V5.201. I did the ASIO configuration on Reaper and configured UMA-8 to bypass mode (see attachments). Reaper only showed 2 channels, not 8 channels.

There must be something I did not do correctly. I would like to seek expert advice.
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Stereo out on I2S_OUT_0 3 months 1 week ago #33576

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@ Melitta

unfortunately, we're unsure why you'd use ASIO4ALL.. :-( . Did you check our user manual? there is a miniDSP driver that is to be used... That's the one that will provide 8ch raw audio. pls check our manual along with installing the correct drivers.

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Stereo out on I2S_OUT_0 3 months 1 week ago #33585

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I have installed the miniDSP driver (miniDSP_UAC2_v4.11.0_2017-06-19_setup).

Bypass is set to ON. I still cannot detect 8 channels. I have included the screenshots from Reaper and Device Manager.

Looks like something is still not done correctly.
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Stereo out on I2S_OUT_0 3 months 5 days ago #33609

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@ Melitta
Somehow, I wonder if you actually loaded the correct firmware. The sole fact that you're able to connect with the "Mic Array" application tells us that you are still running the DSP firmware, and not the RAW mode firmware as per manual...
If you do indeed load the Raw mode, you wouldn't be able to connect via that app.

Could be wrong.. :-)

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Stereo out on I2S_OUT_0 3 months 5 days ago #33614

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I did not change the firmware, thus the device is still using the firmware provided by the factory.

I missed the point in the User Manual that stated using a dedicated firmware for 8-channel raw mode. I think you are correct. I have to change the firmware.

For Windows system, I will follow the instructions in the 9.2.1 of the User Manual. Correct?

What is the correct firmware name or version?

I suppose I can always revert back to current firmware. Let me know if it isn't.
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Stereo out on I2S_OUT_0 3 months 5 days ago #33644

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@ Melitta

Yes, indeed follow that magic doc called the user manual... ;-)
well the firmware is the firmware contained inside the zip file.
micArray_RAW8_v1.0_Up.bin = 8ch mode
micArray_xvsm_v1.5_Up.bin = 2ch mode

HTH
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Stereo out on I2S_OUT_0 2 months 3 weeks ago #33800

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It works. :laugh:

Thanks you very much.
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Stereo out on I2S_OUT_0 2 months 3 weeks ago #33811

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Is there wiring diagram for the spare PDM microphone?
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Stereo out on I2S_OUT_0 2 months 2 weeks ago #34026

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@ Melitta
No there isn't but it's not that complex. Best that you start a tech support tix with our team and we can double check that you indeed have the correct MEMS connected. (support.minidsp.com) is our tech support portal.

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