NOTE: Vista 64/Windows 7, 8,8.1 & 10 64 bit and Beep prompt: Microsoft (in its infinite wisdom) has removed the built in speaker driver, and now relies on systems having a sound card and speakers's installed and turned on to hear system beeps. Sudo apt-get update sudo apt-get upgrade sudo apt-get install git cmake libusb-1.0-0.dev build-essential lame sudo apt-get install libmp3lame-dev libvorbis-dev libshout-dev libtwolame0 libtwolame-dev libjack-jackd2-dev sudo reboot Configure the Sound Card. Plug your scanner's headphone jack into the mic jack on the USB sound card dongle.
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The ReSpeaker USB 4 Mic Array is the successor of the ReSpeaker USB 6+1 Mic Array. It has better built-in audio processing algorithms than the 6+1 Mic Array, so it has better audio recording quality, although it only has 4 microphones.
Features
- 4 microphones
- 12 RGB LEDs
- USB
- built-in AEC, VAD, DOA, Beamforming and NS
- 16000 sample rate
Usage
Audacity is recommended.
LED control driver for Windows
On Linux and macOS, the USB 4 Mic Array will just work. On Windows, audio recording and playback will also work without installing a driver. But in order to control LEDs and to tune DSP parameters on Windows, the libusb-win32 driver is required. We use a handy tool - Zadig to install the libusb-win32 driver for both SEEED DFU and SEEED Control (the USB 4 Mic Array has 4 devices on Windows Device Manager).
Note
Make sure that libusb-win32 is selected, not WinUSB or libusbK
Device Firmware Update on Linux
The Microphone Array supports USB DFU. We have a python script dfu.py to do that.
Note
The USB DFU on Windows is buggy, some Windows work (tested on Surface Book), but some Windows don't. Using Linux to change its firmware is recommended.
How to control the RGB LED ring
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The USB 4 Mic Array has on-board 12 RGB LEDs and has a variety of light effects. Go to the respeaker/pixel_ring to learn how to use it. The LED control protocol is at respeaker/pixel_ring wiki.
Tuning
There are some parameters of built-in algorithms to configure. For example, we can turn off Automatic Gain Control (AGC):
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To get the full list parameters, run:
Realtime sound source localization and tracking
ODAS is a very cool project to perform sound source localization, tracking, separation and post-filtering. Let's have a try!
- get ODAS and build it
- get ODAS Studio from https://github.com/introlab/odas_web/releases and open it.
The odascore will be at odas/bin/odascore, the config file is at odas.cfg. Change odas.cfg based on your sound card number.
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- upgrade your usb 4 mic array with i6_firmware.bin which provides 4 channels raw audio data.