Hey,
I’m sorry to say that I am also having issues recording audio. Hopefully we have the same issue and a common solution can be found. Lets see if the outputs of the following commands match up between us two:
➜ ~ cat /etc/asound.conf
pcm.!default {
type asym
capture.pcm "mic"
playback.pcm "speaker"
}
pcm.mic {
type softvol
slave {
pcm "array"
}
control {
name "MicArray Master"
card "MATRIXIOSOUND"
}
}
pcm.speaker {
type plug
slave {
pcm "hw:0,0"
}
}
pcm.array {
type plug
slave {
pcm "hw:MATRIXIOSOUND"
}
}
pcm.channel_1 {
type dsnoop
ipc_key 234884
slave {
pcm "hw:2,0"
channels 8
}
bindings.0 0
}
pcm.channel_2 {
type dsnoop
ipc_key 234884
slave {
pcm "hw:2,0"
channels 8
}
bindings.0 1
}
pcm.channel_3 {
type dsnoop
ipc_key 234884
slave {
pcm "hw:2,0"
channels 8
}
bindings.0 2
}
pcm.channel_4 {
type dsnoop
ipc_key 234884
slave {
pcm "hw:2,0"
channels 8
}
bindings.0 3
}
pcm.channel_5 {
type dsnoop
ipc_key 234884
slave {
pcm "hw:2,0"
channels 8
}
bindings.0 4
}
pcm.channel_6 {
type dsnoop
ipc_key 234884
slave {
pcm "hw:2,0"
channels 8
}
bindings.0 5
}
pcm.channel_7 {
type dsnoop
ipc_key 234884
slave {
pcm "hw:2,0"
channels 8
}
bindings.0 6
}
pcm.channel_8 {
type dsnoop
ipc_key 234884
slave {
pcm "hw:2,0"
channels 8
}
bindings.0 7
}
pcm.all_channels {
type dsnoop
ipc_key 234884
slave {
pcm "hw:2,0"
channels 8
}
bindings {
0 0
0 1
0 2
0 3
0 4
0 5
0 6
0 7
}
}
➜ ~ arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: Dummy [Dummy], device 0: Dummy PCM [Dummy PCM]
Subdevices: 7/8
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
Subdevice #4: subdevice #4
Subdevice #5: subdevice #5
Subdevice #6: subdevice #6
Subdevice #7: subdevice #7
card 2: MATRIXIOSOUND [MATRIXIO-SOUND], device 0: matrixio.mic.0 snd-soc-dummy-dai-0 []
Subdevices: 0/1
Subdevice #0: subdevice #0
➜ ~ ls /boot/overlays | grep matrix
matrixio.dtbo
➜ ~ sudo lsmod | grep matrix
matrixio_uart 16384 0
matrixio_codec 16384 4
matrixio_playback 49152 1
matrixio_mic 16384 1
snd_soc_core 192512 4 matrixio_playback,vc4,matrixio_codec,matrixio_mic
matrixio_env 16384 0
matrixio_imu 16384 0
industrialio 73728 2 matrixio_imu,matrixio_env
matrixio_gpio 16384 0
matrixio_everloop 16384 0
matrixio_regmap 61440 1
matrixio_core 16384 7 matrixio_everloop,matrixio_regmap,matrixio_playback,matrixio_imu,matrixio_mic,matrixio_uart,matrixio_env
snd_pcm 102400 11 matrixio_playback,vc4,snd_pcm_dmaengine,matrixio_mic,snd_bcm2835,snd_soc_core,snd_dummy
snd 73728 25 snd_compress,matrixio_playback,snd_timer,snd_bcm2835,snd_soc_core,snd_dummy,snd_pcm
➜ ~ sudo dpkg -l | grep matrix
ii libmatrixio-creator-hal:armhf 0.3.8 armhf Hardware Abstraction Layer for MATRIX.
ii libmatrixio-creator-hal-dev 0.3.8 armhf Hardware Abstraction Layer for MATRIX (headers)
ii libmatrixio-malos:armhf 0.1.4 armhf Libraries of MATRIX abstraction layer for MOS
ii libmatrixio-malos-dev 0.1.4 armhf Libraries of MATRIX abstraction layer for MOS
ii libmatrixio-protos:armhf 0.1.6 armhf Protocolbuffers for MATRIX abstraction layer
ii libmatrixio-protos-dev 0.1.6 armhf Protocolbuffers headers for MATRIX abstraction layer
ii libswresample3:armhf 7:4.1.4-1+rpt7~deb10u1 armhf FFmpeg library for audio resampling, rematrixing etc. - runtime files
ii matrixio-creator-init 0.4.17 armhf Install scripts that can program the MATRIX Creator FPGA and SAM3 IMU.
ii matrixio-kernel-modules 0.2.3 all Source DKMS for MATRIXIO kernel modules.
ii matrixio-libzwaveip:armhf 0.1.2 armhf libzwaveip is a library to control Z-Wave devices from your IP network via a Z/IP Gateway
ii matrixio-libzwaveip-dev 0.1.2 armhf libzwaveip is a library to control Z-Wave devices from your IP network via a Z/IP Gateway
ii matrixio-malos 0.3.6 armhf Allows queries to MATRIX Creator hardware via ZMQ.
ii matrixio-malos-zigbee 0.1.7 armhf Allows queries to MATRIX Creator hardware via ZMQ.
ii matrixio-malos-zwave 0.1.6 armhf Allows queries to MATRIX Creator hardware via ZMQ.
ii matrixio-openocd 1.0.1.002 armhf Open on-chip JTAG debug solution for ARM and MIPS systems
ii matrixio-protobuf 3.8.0 armhf Protocol Buffers - Google's data interchange format. (From GRPC 3.8.0)
ii matrixio-xc3sprog 1.1.1.003 armhf Spartan3, XCF and CPLD JTAG programmer and other utilities.
ii matrixio-zipgateway 2.61.0 armhf zipgateway built using CMake
ii matrixio-zwave-utils 0.2.1 armhf Install scripts that can init the Zwave Module in MATRIX Creator.
➜ ~ cat /usr/share/alsa/alsa.conf
#
# ALSA library configuration file
#
# pre-load the configuration files
@hooks [
{
func load
files [
"/etc/alsa/conf.d"
"/etc/asound.conf"
"~/.asoundrc"
]
errors false
}
]
# load card-specific configuration files (on request)
cards.@hooks [
{
func load
files [
{
@func concat
strings [
{ @func datadir }
"/cards/aliases.conf"
]
}
]
}
{
func load_for_all_cards
files [
{
@func concat
strings [
{ @func datadir }
"/cards/"
{ @func private_string }
".conf"
]
}
]
errors false
}
]
#
# defaults
#
# show all name hints also for definitions without hint {} section
defaults.namehint.showall on
# show just basic name hints
defaults.namehint.basic on
# show extended name hints
defaults.namehint.extended on
#
defaults.ctl.card 0
defaults.pcm.card 0
defaults.pcm.device 0
defaults.pcm.subdevice -1
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
defaults.pcm.rear.device defaults.pcm.device
defaults.pcm.center_lfe.card defaults.pcm.card
defaults.pcm.center_lfe.device defaults.pcm.device
defaults.pcm.side.card defaults.pcm.card
defaults.pcm.side.device defaults.pcm.device
defaults.pcm.surround21.card defaults.pcm.card
defaults.pcm.surround21.device defaults.pcm.device
defaults.pcm.surround40.card defaults.pcm.card
defaults.pcm.surround40.device defaults.pcm.device
defaults.pcm.surround41.card defaults.pcm.card
defaults.pcm.surround41.device defaults.pcm.device
defaults.pcm.surround50.card defaults.pcm.card
defaults.pcm.surround50.device defaults.pcm.device
defaults.pcm.surround51.card defaults.pcm.card
defaults.pcm.surround51.device defaults.pcm.device
defaults.pcm.surround71.card defaults.pcm.card
defaults.pcm.surround71.device defaults.pcm.device
defaults.pcm.iec958.card defaults.pcm.card
defaults.pcm.iec958.device defaults.pcm.device
defaults.pcm.modem.card defaults.pcm.card
defaults.pcm.modem.device defaults.pcm.device
# truncate files via file or tee PCM
defaults.pcm.file_format "raw"
defaults.pcm.file_truncate true
defaults.rawmidi.card 0
defaults.rawmidi.device 0
defaults.rawmidi.subdevice -1
defaults.hwdep.card 0
defaults.hwdep.device 0
defaults.timer.class 2
defaults.timer.sclass 0
defaults.timer.card 0
defaults.timer.device 0
defaults.timer.subdevice 0
#
# PCM interface
#
# redirect to load-on-demand extended pcm definitions
pcm.cards cards.pcm
pcm.default cards.pcm.default
pcm.sysdefault cards.pcm.default
pcm.front cards.pcm.front
pcm.rear cards.pcm.rear
pcm.center_lfe cards.pcm.center_lfe
pcm.side cards.pcm.side
pcm.surround21 cards.pcm.surround21
pcm.surround40 cards.pcm.surround40
pcm.surround41 cards.pcm.surround41
pcm.surround50 cards.pcm.surround50
pcm.surround51 cards.pcm.surround51
pcm.surround71 cards.pcm.surround71
pcm.iec958 cards.pcm.iec958
pcm.spdif iec958
pcm.hdmi cards.pcm.hdmi
pcm.dmix cards.pcm.dmix
pcm.dsnoop cards.pcm.dsnoop
pcm.modem cards.pcm.modem
pcm.phoneline cards.pcm.phoneline
pcm.hw {
@args [ CARD DEV SUBDEV ]
@args.CARD {
type string
default {
@func getenv
vars [
ALSA_PCM_CARD
ALSA_CARD
]
default {
@func refer
name defaults.pcm.card
}
}
}
@args.DEV {
type integer
default {
@func igetenv
vars [
ALSA_PCM_DEVICE
]
default {
@func refer
name defaults.pcm.device
}
}
}
@args.SUBDEV {
type integer
default {
@func refer
name defaults.pcm.subdevice
}
}
type hw
card $CARD
device $DEV
subdevice $SUBDEV
hint {
show {
@func refer
name defaults.namehint.extended
}
description "Direct hardware device without any conversions"
}
}
pcm.plughw {
@args [ CARD DEV SUBDEV ]
@args.CARD {
type string
default {
@func getenv
vars [
ALSA_PCM_CARD
ALSA_CARD
]
default {
@func refer
name defaults.pcm.card
}
}
}
@args.DEV {
type integer
default {
@func igetenv
vars [
ALSA_PCM_DEVICE
]
default {
@func refer
name defaults.pcm.device
}
}
}
@args.SUBDEV {
type integer
default {
@func refer
name defaults.pcm.subdevice
}
}
type plug
slave.pcm {
type hw
card $CARD
device $DEV
subdevice $SUBDEV
}
hint {
show {
@func refer
name defaults.namehint.extended
}
description "Hardware device with all software conversions"
}
}
pcm.plug {
@args [ SLAVE ]
@args.SLAVE {
type string
}
type plug
slave.pcm $SLAVE
}
pcm.shm {
@args [ SOCKET PCM ]
@args.SOCKET {
type string
}
@args.PCM {
type string
}
type shm
server $SOCKET
pcm $PCM
}
pcm.tee {
@args [ SLAVE FILE FORMAT ]
@args.SLAVE {
type string
}
@args.FILE {
type string
}
@args.FORMAT {
type string
default {
@func refer
name defaults.pcm.file_format
}
}
type file
slave.pcm $SLAVE
file $FILE
format $FORMAT
truncate {
@func refer
name defaults.pcm.file_truncate
}
}
pcm.file {
@args [ FILE FORMAT ]
@args.FILE {
type string
}
@args.FORMAT {
type string
default {
@func refer
name defaults.pcm.file_format
}
}
type file
slave.pcm null
file $FILE
format $FORMAT
truncate {
@func refer
name defaults.pcm.file_truncate
}
}
pcm.null {
type null
hint {
show {
@func refer
name defaults.namehint.basic
}
description "Discard all samples (playback) or generate zero samples (capture)"
}
}
#
# Control interface
#
ctl.sysdefault {
type hw
card {
@func getenv
vars [
ALSA_CTL_CARD
ALSA_CARD
]
default {
@func refer
name defaults.ctl.card
}
}
hint.description "Default control device"
}
ctl.default ctl.sysdefault
ctl.hw {
@args [ CARD ]
@args.CARD {
type string
default {
@func getenv
vars [
ALSA_CTL_CARD
ALSA_CARD
]
default {
@func refer
name defaults.ctl.card
}
}
}
type hw
card $CARD
hint.description "Direct control device"
}
ctl.shm {
@args [ SOCKET CTL ]
@args.SOCKET {
type string
}
@args.CTL {
type string
}
type shm
server $SOCKET
ctl $CTL
}
#
# RawMidi interface
#
rawmidi.default {
type hw
card {
@func getenv
vars [
ALSA_RAWMIDI_CARD
ALSA_CARD
]
default {
@func refer
name defaults.rawmidi.card
}
}
device {
@func igetenv
vars [
ALSA_RAWMIDI_DEVICE
]
default {
@func refer
name defaults.rawmidi.device
}
}
hint.description "Default raw MIDI device"
}
rawmidi.hw {
@args [ CARD DEV SUBDEV ]
@args.CARD {
type string
default {
@func getenv
vars [
ALSA_RAWMIDI_CARD
ALSA_CARD
]
default {
@func refer
name defaults.rawmidi.card
}
}
}
@args.DEV {
type integer
default {
@func igetenv
vars [
ALSA_RAWMIDI_DEVICE
]
default {
@func refer
name defaults.rawmidi.device
}
}
}
@args.SUBDEV {
type integer
default -1
}
type hw
card $CARD
device $DEV
subdevice $SUBDEV
hint {
description "Direct rawmidi driver device"
device $DEV
}
}
rawmidi.virtual {
@args [ MERGE ]
@args.MERGE {
type string
default 1
}
type virtual
merge $MERGE
}
#
# Sequencer interface
#
seq.default {
type hw
hint.description "Default sequencer device"
}
seq.hw {
type hw
}
#
# HwDep interface
#
hwdep.default {
type hw
card {
@func getenv
vars [
ALSA_HWDEP_CARD
ALSA_CARD
]
default {
@func refer
name defaults.hwdep.card
}
}
device {
@func igetenv
vars [
ALSA_HWDEP_DEVICE
]
default {
@func refer
name defaults.hwdep.device
}
}
hint.description "Default hardware dependent device"
}
hwdep.hw {
@args [ CARD DEV ]
@args.CARD {
type string
default {
@func getenv
vars [
ALSA_HWDEP_CARD
ALSA_CARD
]
default {
@func refer
name defaults.hwdep.card
}
}
}
@args.DEV {
type integer
default {
@func igetenv
vars [
ALSA_HWDEP_DEVICE
]
default {
@func refer
name defaults.hwdep.device
}
}
}
type hw
card $CARD
device $DEV
hint {
description "Direct hardware dependent device"
device $DEV
}
}
#
# Timer interface
#
timer_query.default {
type hw
}
timer_query.hw {
type hw
}
timer.default {
type hw
class {
@func refer
name defaults.timer.class
}
sclass {
@func refer
name defaults.timer.sclass
}
card {
@func refer
name defaults.timer.card
}
device {
@func refer
name defaults.timer.device
}
subdevice {
@func refer
name defaults.timer.subdevice
}
hint.description "Default timer device"
}
timer.hw {
@args [ CLASS SCLASS CARD DEV SUBDEV ]
@args.CLASS {
type integer
default {
@func refer
name defaults.timer.class
}
}
@args.SCLASS {
type integer
default {
@func refer
name defaults.timer.sclass
}
}
@args.CARD {
type string
default {
@func refer
name defaults.timer.card
}
}
@args.DEV {
type integer
default {
@func refer
name defaults.timer.device
}
}
@args.SUBDEV {
type integer
default {
@func refer
name defaults.timer.subdevice
}
}
type hw
class $CLASS
sclass $SCLASS
card $CARD
device $DEV
subdevice $SUBDEV
hint {
description "Direct timer device"
device $DEV
}
}
All I can get out of this command is a recording with a whole bunch of clicks. Every other recording I’ve tried either didn’t work (because the instructions referred to “mic_channel0” or “hw:2,0” which aren’t valid on my device)
arecord --device=hw:1,0 -r 16000 -c 1 -f S16_LE test.wav
REALLY LOUD RECORDING
I should mention that I have already tried reinstalling many of the required packages (MALOS and Matrix Kernels) as well as trying to compile them by source, but neither produced anything new to use. I’ve also tried many of the examples in their respective packages (even tried HAL but it said I should use ASLA) node test_micarray.js , python3 recordFile.py , python3 pyaudio_test.py and all of them resulted in some error.
