Remap stereo to mono (pulse audio)
Imagine you have only one ear or one speaker. In either case:
Find out your standard audio sink:
pacmd list-sinks
Actually, this gives you a long list of details. Pick the name behind "name:" - See below for full output. For me it is alsa_output.pci-0000_00_1b.0.analog-stereo.
Then add to your /etc/pulse/default.pa (of course as root):
load-module module-remap-sink master=alsa_output.pci-0000_00_1b.0.analog-stereo sink_name=mono channels=2 channel_map=mono,mono set-default-sink mono
That's it and it should give you a virtual mono sink you can switch your player to.
Thanks to the guy from https://wiki.archlinux.org
Output with two sinks (HDMI and PCH):
.config/pulse » pacmd list-sinks Welcome to PulseAudio! Use "help" for usage information. >>> 2 sink(s) available. index: 0 name: driver: flags: HARDWARE DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY state: SUSPENDED suspend cause: IDLE priority: 9950 volume: 0: 100% 1: 100% 0: 0,00 dB 1: 0,00 dB balance 0,00 base volume: 100% 0,00 dB volume steps: 65537 muted: no current latency: 0,00 ms max request: 0 KiB max rewind: 0 KiB monitor source: 0 sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo used by: 0 linked by: 0 configured latency: 0,00 ms; range is 0,50 .. 371,52 ms card: 0 module: 4 properties: alsa.resolution_bits = "16" device.api = "alsa" device.class = "sound" alsa.class = "generic" alsa.subclass = "generic-mix" alsa.name = "HDMI 0" alsa.id = "HDMI 0" alsa.subdevice = "0" alsa.subdevice_name = "subdevice #0" alsa.device = "3" alsa.card = "0" alsa.card_name = "HDA Intel HDMI" alsa.long_card_name = "HDA Intel HDMI at 0xf0620000 irq 62" alsa.driver_name = "snd_hda_intel" device.bus_path = "pci-0000:00:03.0" sysfs.path = "/devices/pci0000:00/0000:00:03.0/sound/card0" device.bus = "pci" device.vendor.id = "8086" device.vendor.name = "Intel Corporation" device.product.id = "0a0c" device.form_factor = "internal" device.string = "hdmi:0" device.buffering.buffer_size = "65536" device.buffering.fragment_size = "32768" device.access_mode = "mmap+timer" device.profile.name = "hdmi-stereo" device.profile.description = "Digital Stereo (HDMI)" device.description = "Built-in Audio Digital Stereo (HDMI)" alsa.mixer_name = "Intel Haswell HDMI" alsa.components = "HDA:80862807,80860101,00100000" module-udev-detect.discovered = "1" device.icon_name = "audio-card-pci" ports: hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 usec, available: no) properties: device.icon_name = "video-display" active port: * index: 1 name: driver: flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY state: RUNNING suspend cause: priority: 9959 volume: 0: 80% 1: 80% 0: -5,81 dB 1: -5,81 dB balance 0,00 base volume: 100% 0,00 dB volume steps: 65537 muted: no current latency: 11,22 ms max request: 2 KiB max rewind: 64 KiB monitor source: 1 sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo used by: 2 linked by: 2 configured latency: 11,61 ms; range is 0,50 .. 371,52 ms card: 1 module: 5 properties: alsa.resolution_bits = "16" device.api = "alsa" device.class = "sound" alsa.class = "generic" alsa.subclass = "generic-mix" alsa.name = "ALC3232 Analog" alsa.id = "ALC3232 Analog" alsa.subdevice = "0" alsa.subdevice_name = "subdevice #0" alsa.device = "0" alsa.card = "1" alsa.card_name = "HDA Intel PCH" alsa.long_card_name = "HDA Intel PCH at 0xf0624000 irq 63" alsa.driver_name = "snd_hda_intel" device.bus_path = "pci-0000:00:1b.0" sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card1" device.bus = "pci" device.vendor.id = "8086" device.vendor.name = "Intel Corporation" device.product.id = "9c20" device.product.name = "Lynx Point-LP HD Audio Controller" device.form_factor = "internal" device.string = "front:1" 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 ALC3232" alsa.components = "HDA:10ec0292,17aa220c,00100001" module-udev-detect.discovered = "1" device.icon_name = "audio-card-pci" ports: analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown) properties: device.icon_name = "audio-speakers" analog-output-headphones: Headphones (priority 9000, latency offset 0 usec, available: no) properties: device.icon_name = "audio-headphones" active port: >>> % .config/pulse »