[Python] Mic Array

Respeaker

respeaker

respeaker HW

• 6채널 또는 1채널의 마이크 입력
• 소리가 발생하는 방향을 알 수 있음 (아래의 프로그램을 활용, resoultion : 1 degree)

 

 

Update Firmware

Firmware	Channels	Note
1_channel_firmware.bin	1	processed audio for ASR
6_channels_firmware.bin	6	channel 0    : processed audio for ASR, channel 1-4 : 4 microphones' raw data, channel 5: playback（factory firmware）

$ sudo apt-get update
$ sudo apt-get install python-usb
$ 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

 

Tuning

$ git clone https://github.com/respeaker/usb_4_mic_array.git
$ cd usb_4_mic_array
$ python tuning.py -p

 

DOA (Direction of Arrival)

$ git clone https://github.com/respeaker/usb_4_mic_array.git
$ cd usb_4_mic_array
$ nano doa.py

Copy and Paste to doa.py

from tuning import Tuning
import usb.core
import usb.util
import time
 
dev = usb.core.find(idVendor=0x2886, idProduct=0x0018)
 
if dev:
    Mic_tuning = Tuning(dev)
    print Mic_tuning.direction
    while True:
        try:
            print Mic_tuning.direction
            time.sleep(1)
        except KeyboardInterrupt:
            break

$ sudo python doa.py 

184
183
175
105
104
104
103

 

Extract Voice

$ sudo apt-get install portaudio19-dev python-pyaudio
$ sudo pip install pyaudio
$ cd usb_4_mic_array
$ gedit get_idx.py

import pyaudio
 
p = pyaudio.PyAudio()
info = p.get_host_api_info_by_index(0)
numdevices = info.get('deviceCount')
 
for i in range(0, numdevices):
        if (p.get_device_info_by_host_api_device_index(0, i).get('maxInputChannels')) > 0:
            print "Input Device id ", i, " - ", p.get_device_info_by_host_api_device_index(0, i).get('name')

$ python get_idx.py

...
Input Device id  24  -  ReSpeaker 4 Mic Array (UAC1.0): USB Audio (hw:2,0)
...

# index : 24

import pyaudio
import wave
 
RESPEAKER_RATE = 16000
RESPEAKER_CHANNELS = 6 # change base on firmwares, 1_channel_firmware.bin as 1 or 6_channels_firmware.bin as 6
RESPEAKER_WIDTH = 2
# run getDeviceInfo.py to get index
RESPEAKER_INDEX = 24  # refer to input device id
CHUNK = 1024
RECORD_SECONDS = 5
WAVE_OUTPUT_FILENAME = "output.wav"
 
p = pyaudio.PyAudio()
 
stream = p.open(
            rate=RESPEAKER_RATE,
            format=p.get_format_from_width(RESPEAKER_WIDTH),
            channels=RESPEAKER_CHANNELS,
            input=True,
            input_device_index=RESPEAKER_INDEX,)
 
print("* recording")
 
frames = []
 
for i in range(0, int(RESPEAKER_RATE / CHUNK * RECORD_SECONDS)):
    data = stream.read(CHUNK)
    frames.append(data)
 
print("* done recording")
 
stream.stop_stream()
stream.close()
p.terminate()
 
wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
wf.setnchannels(RESPEAKER_CHANNELS)
wf.setsampwidth(p.get_sample_size(p.get_format_from_width(RESPEAKER_WIDTH)))
wf.setframerate(RESPEAKER_RATE)
wf.writeframes(b''.join(frames))
wf.close()

 

 

https://wiki.seeedstudio.com/ReSpeaker-USB-Mic-Array/

ReSpeaker USB Mic Array - Seeed Wiki