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ReSpeaker Mic Array V2 recording noise

Posted: Sat May 25, 2019 7:09 am
by ningma97
Hi,

I posted this before but still cannot solve the issue.

I connected the ReSpeaker Mic Array V2 from the bottom pins to a Raspberry Pi 3B+. All works fine but I notice the recording has an audible noise. See the attached spectrogram: the noise is shown as the horizontal lines as multiples of 1kHz.

If I connect the Mic Array via the micro USB port, the situation is slightly better but it seems to depend on the USB cable. In the end I found a very short USB cable and used to connect the mic array via the micro USB port, the noise disappeared.

I need to connect the Mic Array from the bottom as the micro USB port is in the way. Any suggestions, please?

Ning

Re: ReSpeaker Mic Array V2 recording noise

Posted: Thu Jun 13, 2019 4:15 pm
by bill.yu
Hi there,

We updated the firmware and you can delete your local one and download the latest one, burn to your xmos. Hope it can solve the issue. thanks.

Code: Select all

sudo apt-get update
sudo pip install pyusb click
git clone https://github.com/respeaker/usb_4_mic_array.git
cd usb_4_mic_array
sudo python dfu.py --download 6_channels_firmware.bin  # The 6 channels version 

# if you want to use 1 channel,then the command should be like:

sudo python dfu.py --download 1_channel_firmware.bin

Re: ReSpeaker Mic Array V2 recording noise

Posted: Sat Aug 10, 2019 7:49 am
by ningma97
Hi

I have tested the new firmware but the interference noise is still there when using a Raspberry Pi 3B+.

The noise seems to be caused by the Pi as when tested on a Mac computer there is no interference noise.

Any advice on using it with a Raspberry Pi? I have purchased four Mic-Array V2 boards and all have the same issue. Please help.

Best
Ning

Re: ReSpeaker Mic Array V2 recording noise

Posted: Wed Aug 21, 2019 6:13 pm
by bill.yu
Hi Ning~

Please try below instructions. thanks.

1. change to another usb cable
2. change to another raspberry pi usb port
3. change to another raspberry pi