Hi all ! This is my first post !
I’ve purchased the ReSpeaker 2-Mics HAT for the Raspberry PI and would love to use it !
I’ve followed the instructions on the wiki - http://wiki.seeedstudio.com/ReSpeaker_2_Mics_Pi_HAT/
but no sound in the headphone port of 2mics hat. i have 3 audio outputs in my pi. built in audio, HDMI and 2-mics hat. then i disable builtin sound device via boot config file.
[code]aplay -l && arecord -l
**** List of PLAYBACK Hardware Devices ****
card 0: seeed2micvoicec [seeed-2mic-voicecard], device 0: bcm2835-i2s-wm8960-hifi wm8960-hifi-0 []
Subdevices: 0/1
Subdevice #0: subdevice #0
**** List of CAPTURE Hardware Devices ****
card 0: seeed2micvoicec [seeed-2mic-voicecard], device 0: bcm2835-i2s-wm8960-hifi wm8960-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
root@SmartMirror:/home/pi#[/code]
[code]sudo nano /boot/config.txt
Enable audio (loads snd_bcm2835)
#dtparam=audio=on
start_x=1
gpu_mem=128
DISPLAY_ROTATE=0
dtoverlay=i2s-mmap[/code]
then i copy asound.conf and asound.state files from the source dist of the re-speaker driver on github and installing them according to the instructions (put asound.conf in /etc, use alsactl command to install asound.state)
[code]sudo nano /etc/asound.conf
The IPC key of dmix or dsnoop plugin must be unique
If 555555 or 666666 is used by other processes, use another one
pcm.!default {
type asym
playback.pcm “playback”
capture.pcm “capture”
}
pcm.playback {
type plug
slave.pcm “dmixed”
}
pcm.capture {
type plug
slave.pcm “array”
}
pcm.dmixed {
type dmix
slave.pcm “hw:0,0”
ipc_key 555555
}
pcm.array {
type dsnoop
slave {
pcm “hw:0,0”
channels 2
}
ipc_key 666666
}
[/code]
still no sound in 2-mics hat. alsa.conf also not changed.
[code]sudo nano /usr/share/alsa/alsa.conf
defaults.ctl.card 0
defaults.pcm.card 0
defaults.pcm.device 0
defaults.pcm.subdevice -0
defaults.pcm.nonblock 1
defaults.pcm.compat 0
defaults.pcm.minperiodtime 5000 # in us
defaults.pcm.ipc_key 5678293
defaults.pcm.ipc_gid audio
defaults.pcm.ipc_perm 0660
defaults.pcm.dmix.max_periods 0
defaults.pcm.dmix.rate 48000
defaults.pcm.dmix.format “unchanged”
defaults.pcm.dmix.card defaults.pcm.card
defaults.pcm.dmix.device defaults.pcm.device
defaults.pcm.dsnoop.card defaults.pcm.card
defaults.pcm.dsnoop.device defaults.pcm.device
defaults.pcm.front.card defaults.pcm.card
defaults.pcm.front.device defaults.pcm.device
defaults.pcm.rear.card defaults.pcm.card
[/code]
this is my .asoundrc file
[code]sudo nano ~/.asoundrc
pcm.!default {
type asym
playback.pcm
{
type hw
card 0
device 0
}
capture.pcm
{
type hw
card 0
device 0
}
}[/code]
when i use omxplayer command without conditions, i can listen the song via TV HDMI interface.
[code]
omxplayer vaa.mp3
[/code]if i force omxplayer with alsa… theirs no sound in HDMI or 2-mics hat headphone port.
</s>omxplayer vaa.mp3 -o alsa<e>
</s>omxplayer vaa.mp3 -o alsa:hw:0,0
Audio codec mp3 channels 2 samplerate 44100 bitspersample 16
Subtitle count: 0, state: off, index: 1, delay: 0<e>
when i check speaker by…
[code]arecord -f cd -Dhw:0 | aplay -Dhw:0
Recording WAVE ‘stdin’ : Signed 16 bit Little Endian, Rate 44100
Hz, Stereo
Warning: rate is not accurate (requested = 44100Hz, got = 48000Hz)
please, try the plug plugin
aplay: main:788: audio open error: Device or resource busy[/code]
Hardware;
- Raspberry pi 3b
- seeedstudio 2-mics Hat
- 22" HDMI TV
- usb powerd speakers connected to 3.5mm jack of 2-mics Hat
Software;
Raspian Stretch Latest
NPM@3.10.10
NODE@v6.13.1
Java@1.8.0_65-b17
Python@2.7.13
Note: PulseAudio not installed.
Please save my life…