这对我来说也是非常新的，问题可能很简单/愚蠢。
我有 2 个连接到 PC 的 USB 麦克风（带扬声器）。下面的卡 2 和卡 3。
arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: USB [Jabra SPEAK 410 USB], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 3: USB_1 [Jabra SPEAK 510 USB], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
我想将它们合并成一个组合流，并且我希望该输出成为默认麦克风流（我稍后想在 Google Assistant SDK 中使用该流）
我需要这样做，ALSA因为这似乎是谷歌期望的方式。
.asoundrc我在我的主目录中创建了一个包含以下内容的文件：
pcm.multitest {
type multi
slaves.a.pcm "hw:2,0"
slaves.a.channels 2
slaves.b.pcm "hw:3,0"
slaves.b.channels 2
bindings.0.slave a
bindings.0.channel 0
bindings.1.slave a
bindings.1.channel 1
bindings.2.slave b
bindings.2.channel 0
bindings.3.slave b
bindings.3.channel 1
}
我真的不知道如何检查内容是否正确以及如何测试它。我测试了重新启动 alsa-state.service 但我不确定输出应该如何。我正在尝试跟随本文档但如果没有先验知识，很难知道我是否走在正确的道路上
pactl我尝试使用我在中找到的脚本来实现相同的功能另一个问题。
该脚本成功创建了一个组合通道，但是打开像 Audacity 这样的应用程序不会列出该组合通道，所以我在这里也有点困惑。
#!/bin/bash
# Script to map two pulseaudio hardware input sources as mono inputs
# to left and right channel of a new loopback-sink respectively. This
# sink can be used e.g. to use VoIP or record two microphones seperately.
# Copyright (C) 2013, Henning Hollermann, [email protected]
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
do_activate() {
while [ "x" = "x$LEFT" ]; do
echo "Choose Source for left channel by ID"
pactl list short sources
read ID
LEFT=$(pactl list short sources|awk '/^'$ID'/{print $2}')
done
while [ "x" = "x$RIGHT" ]; do
echo "Choose Source for right channel by ID"
pactl list short sources | grep -v $LEFT
read ID
RIGHT=$(pactl list short sources | grep -v $LEFT|awk '/^'$ID'/{print $2}')
done
# Create the name of the Combined sink
NAME="Combined_Mics:_Left:_"$(echo $LEFT|awk -F'.' '$0=$2')"_Right:_"$(echo $RIGHT|awk -F'.' '$0=$2')
echo "[LOAD] null sink as \"$NAME\" to connect the two mics to"
pactl load-module module-null-sink \
sink_name=combined channels=2 \
sink_properties="device.description=$NAME"
echo "[LOAD] map source 1 ($LEFT) to left channel of \"$NAME\""
pactl load-module module-remap-source \
source_name=${LEFT}_left_channel master=$LEFT channels=2 \
master_channel_map=mono,mono channel_map=left,left
pactl load-module module-loopback sink=combined source=${LEFT}_left_channel
echo "[LOAD] map source 2 ($RIGHT) to right channel of \"$NAME\""
pactl load-module module-remap-source \
source_name=${RIGHT}_right_channel master=$RIGHT channels=2 \
master_channel_map=mono,mono channel_map=right,right
pactl load-module module-loopback sink=combined source=${RIGHT}_right_channel
echo "[DONE] Now adjust the left and right channel volume of the new sink to be equally loud"
}
do_deactivate() {
echo "[UNLOAD] pulseaudio modules..."
echo "[UNLOAD] module-loopback"
pactl unload-module module-loopback
echo "[UNLOAD] module-remap-source"
pactl unload-module module-remap-source
echo "[UNLOAD] module-null-sink"
pactl unload-module module-null-sink
}
init() {
for exe in /usr/bin/pulseaudio /usr/bin/pactl; do
if [ ! -x "$exe" ]; then
echo "[ERROR] required file $exe not found or not executable"
exit 1
fi
done
[ ! -x /usr/bin/pavucontrol ] && echo "[NOTICE] pavucontrol might be very useful."
}
# MAIN
init;
case $1 in
activate|enable|start)
do_activate;;
deactivate|disable|stop)
do_deactivate;;
*)
echo "Usage: $0 [enable|disable]";;
esac;