遵循这里提到的一切
在我的带有 Raspbian Bullseye 的 Raspberry Pi 4 上。
使用配对手机拨打电话时，HFP 的传入和传出声音有问题。我可以听到和说话，但它真的很吵，有时会延迟。而 A2DP 一切正常。
这是我的 /etc/pulse/default.pa 文件的一部分
.ifexists module-bluetooth-policy.so
#load-module module-bluetooth-policy
load-module module-bluetooth-policy auto_switch=2
.endif
.ifexists module-bluetooth-discover.so
#load-module module-bluetooth-discover autodetect_mtu=yes
load-module module-bluetooth-discover autodetect_mtu=no headset=auto
.endif
我更改了 /etc/bluetooth/main.conf 中的类
Class = 0x20041C
并添加了文件 /etc/bluetooth/audio.conf
[General]
Class = 0x20041C
Enable = Source,Sink,Media,Socket
使用 A2DP 听音乐时，这里是输出
pactl 列表来源简短
0 alsa_output.platform-bcm2835_audio.analog-stereo.monitor module-alsa-card.c s16le 2ch 44100Hz IDLE
1 bluez_source.XX_XX_XX_XX_XX_XX.a2dp_source module-bluez5-device.c s16le 2ch 44100Hz RUNNING
pactl 清单不足
0 alsa_output.platform-bcm2835_audio.analog-stereo module-alsa-card.c s16le 2ch 44100Hz RUNNING
使用 HFP 调用时，这里是输出
pactl 列表来源简短
0 alsa_output.platform-bcm2835_audio.analog-stereo.monitor module-alsa-card.c s16le 2ch 48000Hz IDLE
2 bluez_sink.XX_XX_XX_XX_XX_XX.headset_audio_gateway.monitor module-bluez5-device.c s16le 1ch 8000Hz IDLE
3 bluez_source.XX_XX_XX_XX_XX_XX.headset_audio_gateway module-bluez5-device.c s16le 1ch 8000Hz RUNNING
pactl 清单不足
0 alsa_output.platform-bcm2835_audio.analog-stereo module-alsa-card.c s16le 2ch 48000Hz RUNNING
1 bluez_sink.XX_XX_XX_XX_XX_XX.headset_audio_gateway module-bluez5-device.c s16le 1ch 8000Hz RUNNING
这是调用时 journalctl -f 的输出
Jan 13 22:31:58 rpi4 rtkit-daemon[612]: Supervising 6 threads of 3 processes of 1 users.
Jan 13 22:31:58 rpi4 rtkit-daemon[612]: Successfully made thread 1505 of process 605 owned by '1000' RT at priority 5.
Jan 13 22:31:58 rpi4 rtkit-daemon[612]: Supervising 7 threads of 3 processes of 1 users.
Jan 13 22:31:58 rpi4 pulseaudio[605]: Cannot set requested sink latency of 66.67 ms, adjusting to 28.00 ms
Jan 13 22:31:58 rpi4 pulseaudio[605]: Cannot set requested source latency of 66.67 ms, adjusting to 28.00 ms
Jan 13 22:31:58 rpi4 pulseaudio[605]: Cannot set requested sink latency of 66.67 ms, adjusting to 59.95 ms
Jan 13 22:31:58 rpi4 pulseaudio[605]: Cannot set requested source latency of 66.67 ms, adjusting to 28.00 ms
Jan 13 22:31:58 rpi4 pulseaudio[605]: Cannot set requested source latency of 66.67 ms, adjusting to 28.00 ms
Jan 13 22:31:58 rpi4 dbus-daemon[341]: [system] Rejected send message, 1 matched rules; type="method_return", sender=":1.30" (uid=1000 pid=605 comm="/usr/bin/pulseaudio --daemonize=no --log-target=jo") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.1" (uid=0 pid=357 comm="/usr/sbin/ofonod -n ")
Jan 13 22:32:09 rpi4 pulseaudio[605]: Too many underruns, increasing latency to 205.00 ms