Setting different per-device sampling rates in pulseaudio?

My Audio Devices

Input: Logitech C310 webcam mic (16kHz)

Output: Sony MBH20 Bluetooth headset (44.1kHz) in High Fidelity Playback (A2DP Sink) mode

My Problem

With the default PulseAudio settings, the bluetooth headset sounds excellent,
but recordings over the webcam mic are high-pitched and sped up, like an Alvin
and the Chipmunks recording.

If I configure PulseAudio to set the sampling rate to 16kHz,

# /etc/pulse/daemon.conf



default-sample-rate = 16000

then the webcam works perfectly, but the sound quality through the headset is
severely degraded.

My questions

Is there any way to configure the sampling rate for only a single source?

pacmd list-sources erroneously reports the sampling rate of the webcam mic
as 48kHz (sample spec: s16le 1ch 48000Hz). Could that be the problem? If
so, is there any way to manually change the sample spec? If not, does this
qualify as a bug that should be reported to the pulseaudio maintainers?

or is there another fix to this problem that I’m not seeing?

edited Feb 15 at 4:51

Rui F Ribeiro

40.7k1479137

asked Feb 15 at 3:32

Ryan Lue

234110

add a comment |

My Audio Devices

Input: Logitech C310 webcam mic (16kHz)

Output: Sony MBH20 Bluetooth headset (44.1kHz) in High Fidelity Playback (A2DP Sink) mode

My Problem

With the default PulseAudio settings, the bluetooth headset sounds excellent,
but recordings over the webcam mic are high-pitched and sped up, like an Alvin
and the Chipmunks recording.

If I configure PulseAudio to set the sampling rate to 16kHz,

# /etc/pulse/daemon.conf



default-sample-rate = 16000

then the webcam works perfectly, but the sound quality through the headset is
severely degraded.

My questions

Is there any way to configure the sampling rate for only a single source?

pacmd list-sources erroneously reports the sampling rate of the webcam mic
as 48kHz (sample spec: s16le 1ch 48000Hz). Could that be the problem? If
so, is there any way to manually change the sample spec? If not, does this
qualify as a bug that should be reported to the pulseaudio maintainers?

or is there another fix to this problem that I’m not seeing?

edited Feb 15 at 4:51

Rui F Ribeiro

40.7k1479137

asked Feb 15 at 3:32

Ryan Lue

234110

add a comment |

My Audio Devices

Input: Logitech C310 webcam mic (16kHz)

Output: Sony MBH20 Bluetooth headset (44.1kHz) in High Fidelity Playback (A2DP Sink) mode

My Problem

With the default PulseAudio settings, the bluetooth headset sounds excellent,
but recordings over the webcam mic are high-pitched and sped up, like an Alvin
and the Chipmunks recording.

If I configure PulseAudio to set the sampling rate to 16kHz,

# /etc/pulse/daemon.conf



default-sample-rate = 16000

then the webcam works perfectly, but the sound quality through the headset is
severely degraded.

My questions

Is there any way to configure the sampling rate for only a single source?

pacmd list-sources erroneously reports the sampling rate of the webcam mic
as 48kHz (sample spec: s16le 1ch 48000Hz). Could that be the problem? If
so, is there any way to manually change the sample spec? If not, does this
qualify as a bug that should be reported to the pulseaudio maintainers?

or is there another fix to this problem that I’m not seeing?

edited Feb 15 at 4:51

Rui F Ribeiro

40.7k1479137

asked Feb 15 at 3:32

Ryan Lue

234110

My Audio Devices

Input: Logitech C310 webcam mic (16kHz)

Output: Sony MBH20 Bluetooth headset (44.1kHz) in High Fidelity Playback (A2DP Sink) mode

My Problem

With the default PulseAudio settings, the bluetooth headset sounds excellent,
but recordings over the webcam mic are high-pitched and sped up, like an Alvin
and the Chipmunks recording.

If I configure PulseAudio to set the sampling rate to 16kHz,

# /etc/pulse/daemon.conf



default-sample-rate = 16000

then the webcam works perfectly, but the sound quality through the headset is
severely degraded.

My questions

Is there any way to configure the sampling rate for only a single source?

pacmd list-sources erroneously reports the sampling rate of the webcam mic
as 48kHz (sample spec: s16le 1ch 48000Hz). Could that be the problem? If
so, is there any way to manually change the sample spec? If not, does this
qualify as a bug that should be reported to the pulseaudio maintainers?

or is there another fix to this problem that I’m not seeing?

audio pulseaudio

edited Feb 15 at 4:51

Rui F Ribeiro

40.7k1479137

asked Feb 15 at 3:32

Ryan Lue

234110

edited Feb 15 at 4:51

Rui F Ribeiro

40.7k1479137

asked Feb 15 at 3:32

Ryan Lue

234110

edited Feb 15 at 4:51

Rui F Ribeiro

40.7k1479137

edited Feb 15 at 4:51

Rui F Ribeiro

40.7k1479137

edited Feb 15 at 4:51

Rui F Ribeiro

40.7k1479137

asked Feb 15 at 3:32

Ryan Lue

234110

asked Feb 15 at 3:32

Ryan Lue

234110

asked Feb 15 at 3:32

Ryan Lue

234110

add a comment |

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