update README.md explaining the cmd line option --compat-kernel

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Jack Shao 2020-04-27 15:16:05 +08:00 committed by GitHub
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@ -9,9 +9,10 @@ Get the seeed voice card source code. and install all linux kernel drivers
```bash
git clone https://github.com/respeaker/seeed-voicecard
cd seeed-voicecard
sudo ./install.sh
sudo ./install.sh
sudo reboot
```
It may probably happen that the driver won't compile with the latest kernel when raspbian rolls out new patches to the kernel. If so, please try `sudo ./install.sh --compat-kernel` which uses an older kernel but ensures that the driver can work.
## ReSpeaker Mic Hat