ReSpeaker Mic Array V2 recording noise

Products & Technology ReSpeaker
#1

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
micarray noise.png

#2

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]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[/code]

#3

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

#4

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