Hello.
I need to have a dual output. My setup is 5.1 system via HDMI + setero output via USB DAC. I’ve tried to do it via pulseaudio, but it seems that something goes wrong.
CoreELEC settings: 5.1 output to combined sink.
Pulseaudio init:
pactl load-module module-alsa-card device_id=0
pactl load-module module-alsa-card device_id=1
pactl load-module module-combine-sink
By default first card (HDMI) is in surround51 profile. It works in such setup, but it sounds X times slower when it should be (like audio in slow motion video). It sounds OK if I switch card 0 to stereo profile. I’ve also tried to load combie sink with channels=6, but it doesn’t help. Also latency values are really big while playing something. Also I’ve tried just surround51 hdmi output via pulseaudio (without adding second card and combine sink) and it less slow, but it still slow. And it’s all OK with stereo…
Hopefully there is something that can be done in this case…
pactl cards.txt:
Card #0
Name: alsa_card.0
Driver: module-alsa-card.c
Owner Module: 16
Properties:
alsa.card = "0"
alsa.card_name = "AML-AUGESOUND"
alsa.long_card_name = "AML-AUGESOUND"
device.bus_path = "/devices/platform/auge_sound/sound/card0"
sysfs.path = "/devices/platform/auge_sound/sound/card0"
device.form_factor = "internal"
device.string = "0"
device.description = "Built-in Audio"
device.icon_name = "audio-card"
Profiles:
input:iec958-stereo: Digital Stereo (IEC958) Input (sinks: 0, sources: 1, priority: 55, available: yes)
output:analog-surround-71: Analog Surround 7.1 Output (sinks: 1, sources: 0, priority: 1200, available: yes)
output:analog-surround-71+input:iec958-stereo: Analog Surround 7.1 Output + Digital Stereo (IEC958) Input (sinks: 1, sources: 1, priority: 1255, available: yes)
output:iec958-stereo: Digital Stereo (IEC958) Output (sinks: 1, sources: 0, priority: 5500, available: yes)
output:iec958-stereo+input:iec958-stereo: Digital Stereo Duplex (IEC958) (sinks: 1, sources: 1, priority: 5555, available: yes)
output:hdmi-stereo: Digital Stereo (HDMI) Output (sinks: 1, sources: 0, priority: 5900, available: yes)
output:hdmi-stereo+input:iec958-stereo: Digital Stereo (HDMI) Output + Digital Stereo (IEC958) Input (sinks: 1, sources: 1, priority: 5955, available: yes)
output:hdmi-surround: Digital Surround 5.1 (HDMI) Output (sinks: 1, sources: 0, priority: 800, available: yes)
output:hdmi-surround+input:iec958-stereo: Digital Surround 5.1 (HDMI) Output + Digital Stereo (IEC958) Input (sinks: 1, sources: 1, priority: 855, available: yes)
output:hdmi-surround71: Digital Surround 7.1 (HDMI) Output (sinks: 1, sources: 0, priority: 800, available: yes)
output:hdmi-surround71+input:iec958-stereo: Digital Surround 7.1 (HDMI) Output + Digital Stereo (IEC958) Input (sinks: 1, sources: 1, priority: 855, available: yes)
off: Off (sinks: 0, sources: 0, priority: 0, available: yes)
Active Profile: output:hdmi-surround
Ports:
iec958-stereo-input: Digital Input (S/PDIF) (type: SPDIF, priority: 0, latency offset: 0 usec, availability unknown)
Part of profile(s): input:iec958-stereo, output:analog-surround-71+input:iec958-stereo, output:iec958-stereo+input:iec958-stereo, output:hdmi-stereo+input:iec958-stereo, output:hdmi-surround+input:iec958-stereo, output:hdmi-surround71+input:iec958-stereo
analog-output: Analog Output (type: Analog, priority: 9900, latency offset: 0 usec, availability unknown)
Part of profile(s): output:analog-surround-71, output:analog-surround-71+input:iec958-stereo
iec958-stereo-output: Digital Output (S/PDIF) (type: SPDIF, priority: 0, latency offset: 0 usec, availability unknown)
Part of profile(s): output:iec958-stereo, output:iec958-stereo+input:iec958-stereo
hdmi-output-0: HDMI / DisplayPort (type: HDMI, priority: 5900, latency offset: 0 usec, availability unknown)
Properties:
device.icon_name = "video-display"
Part of profile(s): output:hdmi-stereo, output:hdmi-stereo+input:iec958-stereo, output:hdmi-surround, output:hdmi-surround+input:iec958-stereo, output:hdmi-surround71, output:hdmi-surround71+input:iec958-stereo
Card #1
Name: alsa_card.1
Driver: module-alsa-card.c
Owner Module: 17
Properties:
alsa.card = "1"
alsa.card_name = "iFi (by AMR) HD USB Audio"
alsa.long_card_name = "iFi (by AMR) iFi (by AMR) HD USB Audio at usb-xhci-hcd.0.auto-1.1, high speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "platform-xhci-hcd.0.auto-usb-0:1.1:1.0"
sysfs.path = "/devices/platform/ff500000.dwc3/xhci-hcd.0.auto/usb1/1-1/1-1.1/1-1.1:1.0/sound/card1"
udev.id = "usb-iFi__by_AMR__iFi__by_AMR__HD_USB_Audio-00"
device.bus = "usb"
device.vendor.id = "20b1"
device.vendor.name = "XMOS Ltd"
device.product.id = "3008"
device.product.name = "iFi (by AMR) HD USB Audio"
device.serial = "iFi__by_AMR__iFi__by_AMR__HD_USB_Audio"
device.string = "1"
device.description = "iFi (by AMR) HD USB Audio"
device.icon_name = "audio-card-usb"
Profiles:
output:analog-stereo: Analog Stereo Output (sinks: 1, sources: 0, priority: 6500, available: yes)
output:iec958-stereo: Digital Stereo (IEC958) Output (sinks: 1, sources: 0, priority: 5500, available: yes)
off: Off (sinks: 0, sources: 0, priority: 0, available: yes)
Active Profile: output:analog-stereo
Ports:
analog-output: Analog Output (type: Analog, priority: 9900, latency offset: 0 usec, availability unknown)
Part of profile(s): output:analog-stereo
iec958-stereo-output: Digital Output (S/PDIF) (type: SPDIF, priority: 0, latency offset: 0 usec, availability unknown)
Part of profile(s): output:iec958-stereo
pactl sinks.txt:
Sink #1
State: SUSPENDED
Name: librespot
Description: Null Output
Driver: module-null-sink.c
Sample Specification: s16le 2ch 44100Hz
Channel Map: front-left,front-right
Owner Module: 14
Mute: no
Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB
balance 0.00
Base Volume: 65536 / 100% / 0.00 dB
Monitor Source: librespot.monitor
Latency: 0 usec, configured 0 usec
Flags: DECIBEL_VOLUME LATENCY SET_FORMATS
Properties:
device.description = "Null Output"
device.class = "abstract"
device.icon_name = "audio-card"
Formats:
pcm
Sink #2
State: SUSPENDED
Name: alsa_output.0.hdmi-surround
Description: Built-in Audio Digital Surround 5.1 (HDMI)
Driver: module-alsa-card.c
Sample Specification: s16le 6ch 44100Hz
Channel Map: front-left,front-right,rear-left,rear-right,front-center,lfe
Owner Module: 16
Mute: no
Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB, rear-left: 65536 / 100% / 0.00 dB, rear-right: 65536 / 100% / 0.00 dB, front-center: 65536 / 100% / 0.00 dB, lfe: 65536 / 100% / 0.00 dB
balance 0.00
Base Volume: 65536 / 100% / 0.00 dB
Monitor Source: alsa_output.0.hdmi-surround.monitor
Latency: 0 usec, configured 0 usec
Flags: HARDWARE DECIBEL_VOLUME LATENCY
Properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = ""
alsa.id = "SPDIF-B-dummy dummy-0"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "0"
alsa.card_name = "AML-AUGESOUND"
alsa.long_card_name = "AML-AUGESOUND"
device.bus_path = "/devices/platform/auge_sound/sound/card0"
sysfs.path = "/devices/platform/auge_sound/sound/card0"
device.form_factor = "internal"
device.string = "hdmi:0"
device.buffering.buffer_size = "262140"
device.buffering.fragment_size = "131064"
device.access_mode = "mmap+timer"
device.profile.name = "hdmi-surround"
device.profile.description = "Digital Surround 5.1 (HDMI)"
device.description = "Built-in Audio Digital Surround 5.1 (HDMI)"
device.icon_name = "audio-card"
Ports:
hdmi-output-0: HDMI / DisplayPort (type: HDMI, priority: 5900, availability unknown)
Active Port: hdmi-output-0
Formats:
pcm
Sink #3
State: SUSPENDED
Name: alsa_output.1.analog-stereo
Description: iFi (by AMR) HD USB Audio Analog Stereo
Driver: module-alsa-card.c
Sample Specification: s32le 2ch 44100Hz
Channel Map: front-left,front-right
Owner Module: 17
Mute: no
Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB
balance 0.00
Base Volume: 65536 / 100% / 0.00 dB
Monitor Source: alsa_output.1.analog-stereo.monitor
Latency: 0 usec, configured 0 usec
Flags: HARDWARE DECIBEL_VOLUME LATENCY
Properties:
alsa.resolution_bits = "32"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "USB Audio"
alsa.id = "USB Audio"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "1"
alsa.card_name = "iFi (by AMR) HD USB Audio"
alsa.long_card_name = "iFi (by AMR) iFi (by AMR) HD USB Audio at usb-xhci-hcd.0.auto-1.1, high speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "platform-xhci-hcd.0.auto-usb-0:1.1:1.0"
sysfs.path = "/devices/platform/ff500000.dwc3/xhci-hcd.0.auto/usb1/1-1/1-1.1/1-1.1:1.0/sound/card1"
udev.id = "usb-iFi__by_AMR__iFi__by_AMR__HD_USB_Audio-00"
device.bus = "usb"
device.vendor.id = "20b1"
device.vendor.name = "XMOS Ltd"
device.product.id = "3008"
device.product.name = "iFi (by AMR) HD USB Audio"
device.serial = "iFi__by_AMR__iFi__by_AMR__HD_USB_Audio"
device.string = "front:1"
device.buffering.buffer_size = "705600"
device.buffering.fragment_size = "352800"
device.access_mode = "mmap+timer"
device.profile.name = "analog-stereo"
device.profile.description = "Analog Stereo"
device.description = "iFi (by AMR) HD USB Audio Analog Stereo"
device.icon_name = "audio-card-usb"
Ports:
analog-output: Analog Output (type: Analog, priority: 9900, availability unknown)
Active Port: analog-output
Formats:
pcm
Sink #4
State: SUSPENDED
Name: combined
Description: Simultaneous output to Built-in Audio Digital Surround 5.1 (HDMI), iFi (by AMR) HD USB Audio Analog Stereo
Driver: module-combine-sink.c
Sample Specification: s16le 2ch 44100Hz
Channel Map: front-left,front-right
Owner Module: 18
Mute: no
Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB
balance 0.00
Base Volume: 65536 / 100% / 0.00 dB
Monitor Source: combined.monitor
Latency: 0 usec, configured 0 usec
Flags: DECIBEL_VOLUME LATENCY
Properties:
device.class = "filter"
device.description = "Simultaneous output to Built-in Audio Digital Surround 5.1 (HDMI), iFi (by AMR) HD USB Audio Analog Stereo"
device.icon_name = "audio-card"
Formats:
pcm