Altera a saída de áudio via linha de comando

Question

Eu preciso usar a linha de comando para mudar de áudio analógico para áudio HDMI.

pacmd list-sources
3 source(s) available.
    index: 131
    name: 
    driver: 
    flags: DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
    state: RUNNING
    suspend cause: 
    priority: 1050
    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
    volume steps: 65537
    muted: no
    current latency: 0.00 ms
    max rewind: 64 KiB
    sample spec: s16le 2ch 44100Hz
    channel map: front-left,front-right
                 Stereo
    used by: 1
    linked by: 1
    configured latency: 40.00 ms; range is 0.50 .. 371.52 ms
    monitor_of: 122
    card: 0 
    module: 6
    properties:
        device.description = "Monitor of GF108 High Definition Audio Controller Digital Stereo (HDMI 4)"
        device.class = "monitor"
        alsa.card = "1"
        alsa.card_name = "HDA NVidia"
        alsa.long_card_name = "HDA NVidia at 0xf7efc000 irq 17"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:01:00.1"
        sysfs.path = "/devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1"
        device.bus = "pci"
        device.vendor.id = "10de"
        device.vendor.name = "NVIDIA Corporation"
        device.product.id = "0bea"
        device.product.name = "GF108 High Definition Audio Controller"
        device.string = "1"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
  * index: 132
    name: 
    driver: 
    flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
    state: RUNNING
    suspend cause: 
    priority: 9959
    volume: front-left: 65540 / 100% / 0.00 dB,   front-right: 65540 / 100% / 0.00 dB
            balance 0.00
    base volume: 6554 /  10% / -60.00 dB
    volume steps: 65537
    muted: yes
    current latency: 0.06 ms
    max rewind: 0 KiB
    sample spec: s16le 2ch 44100Hz
    channel map: front-left,front-right
                 Stereo
    used by: 1
    linked by: 1
    configured latency: 40.00 ms; range is 8.00 .. 371.52 ms
    card: 1 
    module: 7
    properties:
        alsa.resolution_bits = "16"
        device.api = "alsa"
        device.class = "sound"
        alsa.class = "generic"
        alsa.subclass = "generic-mix"
        alsa.name = "ALC892 Analog"
        alsa.id = "ALC892 Analog"
        alsa.subdevice = "0"
        alsa.subdevice_name = "subdevice #0"
        alsa.device = "0"
        alsa.card = "0"
        alsa.card_name = "HDA Intel MID"
        alsa.long_card_name = "HDA Intel MID at 0xf5ff8000 irq 29"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:00:1b.0"
        sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0"
        device.bus = "pci"
        device.vendor.id = "8086"
        device.vendor.name = "Intel Corporation"
        device.product.id = "3b56"
        device.product.name = "5 Series/3400 Series Chipset High Definition Audio"
        device.form_factor = "internal"
        device.string = "front:0"
        device.buffering.buffer_size = "65536"
        device.buffering.fragment_size = "32768"
        device.access_mode = "mmap+timer"
        device.profile.name = "analog-stereo"
        device.profile.description = "Analog Stereo"
        device.description = "Built-in Audio Analog Stereo"
        alsa.mixer_name = "Realtek ALC892"
        alsa.components = "HDA:10ec0892,10438436,00100302"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
    ports:
        analog-input-front-mic: Front Microphone (priority 8500, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "audio-input-microphone"
        analog-input-rear-mic: Rear Microphone (priority 8200, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "audio-input-microphone"
        analog-input-linein: Line In (priority 8100, latency offset 0 usec, available: no)
            properties:

active port: <analog-input-rear-mic>
index: 242
name: <alsa_output.pci-0000_00_1b.0.analog-stereo.monitor>
driver: <module-alsa-card.c>
flags: DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: RUNNING
suspend cause: 
priority: 1950
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
volume steps: 65537
muted: no
current latency: 0.00 ms
max rewind: 64 KiB
sample spec: s16le 2ch 44100Hz
channel map: front-left,front-right
             Stereo
used by: 2
linked by: 2
configured latency: 40.00 ms; range is 0.50 .. 371.52 ms
monitor_of: 232
card: 1 <alsa_card.pci-0000_00_1b.0>
module: 7
properties:
    device.description = "Monitor of Built-in Audio Analog Stereo"
    device.class = "monitor"
    alsa.card = "0"
    alsa.card_name = "HDA Intel MID"
    alsa.long_card_name = "HDA Intel MID at 0xf5ff8000 irq 29"
    alsa.driver_name = "snd_hda_intel"
    device.bus_path = "pci-0000:00:1b.0"
    sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0"
    device.bus = "pci"
    device.vendor.id = "8086"
    device.vendor.name = "Intel Corporation"
    device.product.id = "3b56"
    device.product.name = "5 Series/3400 Series Chipset High Definition Audio"
    device.form_factor = "internal"
    device.string = "0"
    module-udev-detect.discovered = "1"
    device.icon_name = "audio-card-pci"

No passado, eu podia mudar de saída de áudio analógico MOBO para saída de áudio ZOTAC HDMI usando:

pactl set-card-profile 0 output:hdmi-stereo e pacmd set-card-profile 0 saída: analógico-estéreo

Mas foi quando eu tinha uma GPU que conseguiu o áudio via SPDIF do MOBO para o GPU. Agora eu tenho uma GPU que obtém diretamente do slot PCIe.

Qual comando eu preciso usar? Eu sei que funciona bem no controle da GUI. Eu só preciso que funcione por linha de comando. A parte que alterna as exibições já funciona.