So, this also works! You only need to install Node.js, libasound2-dev, and FFTW3 on your Raspberry Pi.
pi@raspberrypi:~/Znodejs $ uname -a Linux raspberrypi 4.9.25-v7+ #994 SMP Fri Apr 28 16:56:00 BST 2017 armv7l GNU/Linux pi@raspberrypi:~/Znodejs $ ./sprig_audio /dev/ttyUSB0 hw:1,0 | node index.js serial device is [/dev/ttyUSB0], audio capture device is [hw:1,0]
See IC-7410 Rig Control with http (7) for the source codes.