Current File : //usr/share/doc/libopenal1/examples/alsoftrc.sample
# OpenAL config file.
#
# Option blocks may appear multiple times, and duplicated options will take the
# last value specified. Environment variables may be specified within option
# values, and are automatically substituted when the config file is loaded.
# Environment variable names may only contain alpha-numeric characters (a-z,
# A-Z, 0-9) and underscores (_), and are prefixed with $. For example,
# specifying "$HOME/file.ext" would typically result in something like
# "/home/user/file.ext". To specify an actual "$" character, use "$$".
#
# Device-specific values may be specified by including the device name in the
# block name, with "general" replaced by the device name. That is, general
# options for the device "Name of Device" would be in the [Name of Device]
# block, while ALSA options would be in the [alsa/Name of Device] block.
# Options marked as "(global)" are not influenced by the device.
#
# The system-wide settings can be put in /etc/xdg/alsoft.conf (as determined by
# the XDG_CONFIG_DIRS env var list, /etc/xdg being the default if unset) and
# user-specific override settings in $HOME/.config/alsoft.conf (as determined
# by the XDG_CONFIG_HOME env var).
#
# For Windows, these settings should go into $AppData\alsoft.ini
#
# An additional configuration file (alsoft.ini on Windows, alsoft.conf on other
# OSs) can be placed alongside the process executable for app-specific config
# settings.
#
# Option and block names are case-senstive. The supplied values are only hints
# and may not be honored (though generally it'll try to get as close as
# possible). Note: options that are left unset may default to app- or system-
# specified values. These are the current available settings:
##
## General stuff
##
[general]
## disable-cpu-exts: (global)
# Disables use of specialized methods that use specific CPU intrinsics.
# Certain methods may utilize CPU extensions for improved performance, and
# this option is useful for preventing some or all of those methods from being
# used. The available extensions are: sse, sse2, sse3, sse4.1, and neon.
# Specifying 'all' disables use of all such specialized methods.
#disable-cpu-exts =
## drivers: (global)
# Sets the backend driver list order, comma-seperated. Unknown backends and
# duplicated names are ignored. Unlisted backends won't be considered for use
# unless the list is ended with a comma (e.g. 'oss,' will try OSS first before
# other backends, while 'oss' will try OSS only). Backends prepended with -
# won't be considered for use (e.g. '-oss,' will try all available backends
# except OSS). An empty list means to try all backends.
#drivers =
## channels:
# Sets the default output channel configuration. If left unspecified, one will
# try to be detected from the system, with a fallback to stereo. The available
# values are: mono, stereo, quad, surround51, surround61, surround71,
# surround3d71, ambi1, ambi2, ambi3. Note that the ambi* configurations output
# ambisonic channels of the given order (using ACN ordering and SN3D
# normalization by default), which need to be decoded to play correctly on
# speakers.
#channels =
## sample-type:
# Sets the default output sample type. Currently, all mixing is done with
# 32-bit float and converted to the output sample type as needed. Available
# values are:
# int8 - signed 8-bit int
# uint8 - unsigned 8-bit int
# int16 - signed 16-bit int
# uint16 - unsigned 16-bit int
# int32 - signed 32-bit int
# uint32 - unsigned 32-bit int
# float32 - 32-bit float
#sample-type = float32
## frequency:
# Sets the default output frequency. If left unspecified it will try to detect
# a default from the system, otherwise it will fallback to 48000.
#frequency =
## period_size:
# Sets the update period size, in sample frames. This is the number of frames
# needed for each mixing update. Acceptable values range between 64 and 8192.
# If left unspecified it will default to 1/50th of the frequency (20ms, or 882
# for 44100, 960 for 48000, etc).
#period_size =
## periods:
# Sets the number of update periods. Higher values create a larger mix ahead,
# which helps protect against skips when the CPU is under load, but increases
# the delay between a sound getting mixed and being heard. Acceptable values
# range between 2 and 16.
#periods = 3
## stereo-mode:
# Specifies if stereo output is treated as being headphones or speakers. With
# headphones, HRTF or crossfeed filters may be used for better audio quality.
# Valid settings are auto, speakers, and headphones.
#stereo-mode = auto
## stereo-encoding:
# Specifies the default encoding method for stereo output. Valid values are:
# basic - Standard amplitude panning (aka pair-wise, stereo pair, etc) between
# -30 and +30 degrees.
# uhj - Creates a stereo-compatible two-channel UHJ mix, which encodes some
# surround sound information into stereo output that can be decoded with
# a surround sound receiver.
# hrtf - Uses filters to provide better spatialization of sounds while using
# stereo headphones.
# If crossfeed filters are used, basic stereo mixing is used.
#stereo-encoding = basic
## ambi-format:
# Specifies the channel order and normalization for the "ambi*" set of channel
# configurations. Valid settings are: fuma, acn+fuma, ambix (or acn+sn3d), or
# acn+n3d
#ambi-format = ambix
## hrtf:
# Deprecated. Consider using stereo-encoding instead. Valid values are auto,
# off, and on.
#hrtf = auto
## hrtf-mode:
# Specifies the rendering mode for HRTF processing. Setting the mode to full
# (default) applies a unique HRIR filter to each source given its relative
# location, providing the clearest directional response at the cost of the
# highest CPU usage. Setting the mode to ambi1, ambi2, or ambi3 will instead
# mix to a first-, second-, or third-order ambisonic buffer respectively, then
# decode that buffer with HRTF filters. Ambi1 has the lowest CPU usage,
# replacing the per-source HRIR filter for a simple 4-channel panning mix, but
# retains full 3D placement at the cost of a more diffuse response. Ambi2 and
# ambi3 increasingly improve the directional clarity, at the cost of more CPU
# usage (still less than "full", given some number of active sources).
#hrtf-mode = full
## hrtf-size:
# Specifies the impulse response size, in samples, for the HRTF filter. Larger
# values increase the filter quality, while smaller values reduce processing
# cost. A value of 0 (default) uses the full filter size in the dataset, and
# the default dataset has a filter size of 64 samples at 48khz.
#hrtf-size = 0
## default-hrtf:
# Specifies the default HRTF to use. When multiple HRTFs are available, this
# determines the preferred one to use if none are specifically requested. Note
# that this is the enumerated HRTF name, not necessarily the filename.
#default-hrtf =
## hrtf-paths:
# Specifies a comma-separated list of paths containing HRTF data sets. The
# format of the files are described in docs/hrtf.txt. The files within the
# directories must have the .mhr file extension to be recognized. By default,
# OS-dependent data paths will be used. They will also be used if the list
# ends with a comma. On Windows this is:
# $AppData\openal\hrtf
# And on other systems, it's (in order):
# $XDG_DATA_HOME/openal/hrtf (defaults to $HOME/.local/share/openal/hrtf)
# $XDG_DATA_DIRS/openal/hrtf (defaults to /usr/local/share/openal/hrtf and
# /usr/share/openal/hrtf)
#hrtf-paths =
## cf_level:
# Sets the crossfeed level for stereo output. Valid values are:
# 0 - No crossfeed
# 1 - Low crossfeed
# 2 - Middle crossfeed
# 3 - High crossfeed (virtual speakers are closer to itself)
# 4 - Low easy crossfeed
# 5 - Middle easy crossfeed
# 6 - High easy crossfeed
# Users of headphones may want to try various settings. Has no effect on non-
# stereo modes.
#cf_level = 0
## resampler: (global)
# Selects the default resampler used when mixing sources. Valid values are:
# point - nearest sample, no interpolation
# linear - extrapolates samples using a linear slope between samples
# cubic - extrapolates samples using a Catmull-Rom spline
# bsinc12 - extrapolates samples using a band-limited Sinc filter (varying
# between 12 and 24 points, with anti-aliasing)
# fast_bsinc12 - same as bsinc12, except without interpolation between down-
# sampling scales
# bsinc24 - extrapolates samples using a band-limited Sinc filter (varying
# between 24 and 48 points, with anti-aliasing)
# fast_bsinc24 - same as bsinc24, except without interpolation between down-
# sampling scales
#resampler = cubic
## rt-prio: (global)
# Sets the real-time priority value for the mixing thread. Not all drivers may
# use this (eg. PortAudio) as those APIs already control the priority of the
# mixing thread. 0 and negative values will disable real-time priority. Note
# that this may constitute a security risk since a real-time priority thread
# can indefinitely block normal-priority threads if it fails to wait. Disable
# this if it turns out to be a problem.
#rt-prio = 1
## rt-time-limit: (global)
# On non-Windows systems, allows reducing the process's RLIMIT_RTTIME resource
# as necessary for acquiring real-time priority from RTKit.
#rt-time-limit = true
## sources:
# Sets the maximum number of allocatable sources. Lower values may help for
# systems with apps that try to play more sounds than the CPU can handle.
#sources = 256
## slots:
# Sets the maximum number of Auxiliary Effect Slots an app can create. A slot
# can use a non-negligible amount of CPU time if an effect is set on it even
# if no sources are feeding it, so this may help when apps use more than the
# system can handle.
#slots = 64
## sends:
# Limits the number of auxiliary sends allowed per source. Setting this higher
# than the default has no effect.
#sends = 6
## front-stablizer:
# Applies filters to "stablize" front sound imaging. A psychoacoustic method
# is used to generate a front-center channel signal from the front-left and
# front-right channels, improving the front response by reducing the combing
# artifacts and phase errors. Consequently, it will only work with channel
# configurations that include front-left, front-right, and front-center.
#front-stablizer = false
## output-limiter:
# Applies a gain limiter on the final mixed output. This reduces the volume
# when the output samples would otherwise clamp, avoiding excessive clipping
# noise.
#output-limiter = true
## dither:
# Applies dithering on the final mix, for 8- and 16-bit output by default.
# This replaces the distortion created by nearest-value quantization with low-
# level whitenoise.
#dither = true
## dither-depth:
# Quantization bit-depth for dithered output. A value of 0 (or less) will
# match the output sample depth. For int32, uint32, and float32 output, 0 will
# disable dithering because they're at or beyond the rendered precision. The
# maximum dither depth is 24.
#dither-depth = 0
## volume-adjust:
# A global volume adjustment for source output, expressed in decibels. The
# value is logarithmic, so +6 will be a scale of (approximately) 2x, +12 will
# be a scale of 4x, etc. Similarly, -6 will be x1/2, and -12 is about x1/4. A
# value of 0 means no change.
#volume-adjust = 0
## excludefx: (global)
# Sets which effects to exclude, preventing apps from using them. This can
# help for apps that try to use effects which are too CPU intensive for the
# system to handle. Available effects are: eaxreverb,reverb,autowah,chorus,
# compressor,distortion,echo,equalizer,flanger,modulator,dedicated,pshifter,
# fshifter,vmorpher.
#excludefx =
## default-reverb: (global)
# A reverb preset that applies by default to all sources on send 0
# (applications that set their own slots on send 0 will override this).
# Available presets include: None, Generic, PaddedCell, Room, Bathroom,
# Livingroom, Stoneroom, Auditorium, ConcertHall, Cave, Arena, Hangar,
# CarpetedHallway, Hallway, StoneCorridor, Alley, Forest, City, Mountains,
# Quarry, Plain, ParkingLot, SewerPipe, Underwater, Drugged, Dizzy, Psychotic.
#default-reverb =
## trap-alc-error: (global)
# Generates a SIGTRAP signal when an ALC device error is generated, on systems
# that support it. This helps when debugging, while trying to find the cause
# of a device error. On Windows, a breakpoint exception is generated.
#trap-alc-error = false
## trap-al-error: (global)
# Generates a SIGTRAP signal when an AL context error is generated, on systems
# that support it. This helps when debugging, while trying to find the cause
# of a context error. On Windows, a breakpoint exception is generated.
#trap-al-error = false
##
## Ambisonic decoder stuff
##
[decoder]
## hq-mode:
# Enables a high-quality ambisonic decoder. This mode is capable of frequency-
# dependent processing, creating a better reproduction of 3D sound rendering
# over surround sound speakers.
#hq-mode = true
## distance-comp:
# Enables compensation for the speakers' relative distances to the listener.
# This applies the necessary delays and attenuation to make the speakers
# behave as though they are all equidistant, which is important for proper
# playback of 3D sound rendering. Requires the proper distances to be
# specified in the decoder configuration file.
#distance-comp = true
## nfc:
# Enables near-field control filters. This simulates and compensates for low-
# frequency effects caused by the curvature of nearby sound-waves, which
# creates a more realistic perception of sound distance with surround sound
# output. Note that the effect may be stronger or weaker than intended if the
# application doesn't use or specify an appropriate unit scale, or if
# incorrect speaker distances are set. For HRTF output, hrtf-mode must be set
# to one of the ambi* values for this to function.
#nfc = false
## speaker-dist:
# Specifies the speaker distance in meters, used by the near-field control
# filters with surround sound output. For ambisonic output modes, this value
# is the basis for the NFC-HOA Reference Delay parameter (calculated as
# delay_seconds = speaker_dist/343.3). This value is not used when a decoder
# configuration is set for the output mode (since they specify the per-speaker
# distances, overriding this setting), or when the NFC filters are off. Valid
# values range from 0.1 to 10.
#speaker-dist = 1
## quad:
# Decoder configuration file for Quadraphonic channel output. See
# docs/ambdec.txt for a description of the file format.
#quad =
## surround51:
# Decoder configuration file for 5.1 Surround (Side and Rear) channel output.
# See docs/ambdec.txt for a description of the file format.
#surround51 =
## surround61:
# Decoder configuration file for 6.1 Surround channel output. See
# docs/ambdec.txt for a description of the file format.
#surround61 =
## surround71:
# Decoder configuration file for 7.1 Surround channel output. See
# docs/ambdec.txt for a description of the file format.
#surround71 =
## surround3d71:
# Decoder configuration file for 3D7.1 Surround channel output. See
# docs/ambdec.txt for a description of the file format. See also
# docs/3D7.1.txt for information about 3D7.1.
#surround3d71 =
##
## UHJ and Super Stereo stuff
##
[uhj]
## decode-filter: (global)
# Specifies the all-pass filter type for UHJ decoding and Super Stereo
# processing. Valid values are:
# iir - utilizes dual IIR filters, providing a wide pass-band with low CPU
# use, but causes additional phase shifts on the signal.
# fir256 - utilizes a 256-point FIR filter, providing more stable results but
# exhibiting attenuation in the lower and higher frequency bands.
# fir512 - utilizes a 512-point FIR filter, providing a wider pass-band than
# fir256, at the cost of more CPU use.
#decode-filter = iir
## encode-filter: (global)
# Specifies the all-pass filter type for UHJ output encoding. Valid values are
# the same as for decode-filter.
#encode-filter = iir
##
## Reverb effect stuff (includes EAX reverb)
##
[reverb]
## boost: (global)
# A global amplification for reverb output, expressed in decibels. The value
# is logarithmic, so +6 will be a scale of (approximately) 2x, +12 will be a
# scale of 4x, etc. Similarly, -6 will be about half, and -12 about 1/4th. A
# value of 0 means no change.
#boost = 0
##
## PipeWire backend stuff
##
[pipewire]
## assume-audio: (global)
# Causes the backend to succeed initialization even if PipeWire reports no
# audio support. Currently, audio support is detected by the presence of audio
# source or sink nodes, although this can cause false negatives in cases where
# device availability during library initialization is spotty. Future versions
# of PipeWire are expected to have a more robust method to test audio support,
# but in the mean time this can be set to true to assume PipeWire has audio
# support even when no nodes may be reported at initialization time.
#assume-audio = false
## rt-mix:
# Renders samples directly in the real-time processing callback. This allows
# for lower latency and less overall CPU utilization, but can increase the
# risk of underruns when increasing the amount of work the mixer needs to do.
#rt-mix = true
##
## PulseAudio backend stuff
##
[pulse]
## spawn-server: (global)
# Attempts to autospawn a PulseAudio server whenever needed (initializing the
# backend, enumerating devices, etc). Setting autospawn to false in Pulse's
# client.conf will still prevent autospawning even if this is set to true.
#spawn-server = false
## allow-moves: (global)
# Allows PulseAudio to move active streams to different devices. Note that the
# device specifier (seen by applications) will not be updated when this
# occurs, and neither will the AL device configuration (sample rate, format,
# etc).
#allow-moves = true
## fix-rate:
# Specifies whether to match the playback stream's sample rate to the device's
# sample rate. Enabling this forces OpenAL Soft to mix sources and effects
# directly to the actual output rate, avoiding a second resample pass by the
# PulseAudio server.
#fix-rate = false
## adjust-latency:
# Attempts to adjust the overall latency of device playback. Note that this
# may have adverse effects on the resulting internal buffer sizes and mixing
# updates, leading to performance problems and drop-outs. However, if the
# PulseAudio server is creating a lot of latency, enabling this may help make
# it more manageable.
#adjust-latency = false
##
## ALSA backend stuff
##
[alsa]
## device: (global)
# Sets the device name for the default playback device.
#device = default
## device-prefix: (global)
# Sets the prefix used by the discovered (non-default) playback devices. This
# will be appended with "CARD=c,DEV=d", where c is the card id and d is the
# device index for the requested device name.
#device-prefix = plughw:
## device-prefix-*: (global)
# Card- and device-specific prefixes may be used to override the device-prefix
# option. The option may specify the card id (eg, device-prefix-NVidia), or
# the card id and device index (eg, device-prefix-NVidia-0). The card id is
# case-sensitive.
#device-prefix- =
## custom-devices: (global)
# Specifies a list of enumerated playback devices and the ALSA devices they
# refer to. The list pattern is "Display Name=ALSA device;...". The display
# names will be returned for device enumeration, and the ALSA device is the
# device name to open for each enumerated device.
#custom-devices =
## capture: (global)
# Sets the device name for the default capture device.
#capture = default
## capture-prefix: (global)
# Sets the prefix used by the discovered (non-default) capture devices. This
# will be appended with "CARD=c,DEV=d", where c is the card id and d is the
# device number for the requested device name.
#capture-prefix = plughw:
## capture-prefix-*: (global)
# Card- and device-specific prefixes may be used to override the
# capture-prefix option. The option may specify the card id (eg,
# capture-prefix-NVidia), or the card id and device index (eg,
# capture-prefix-NVidia-0). The card id is case-sensitive.
#capture-prefix- =
## custom-captures: (global)
# Specifies a list of enumerated capture devices and the ALSA devices they
# refer to. The list pattern is "Display Name=ALSA device;...". The display
# names will be returned for device enumeration, and the ALSA device is the
# device name to open for each enumerated device.
#custom-captures =
## mmap:
# Sets whether to try using mmap mode (helps reduce latencies and CPU
# consumption). If mmap isn't available, it will automatically fall back to
# non-mmap mode. True, yes, on, and non-0 values will attempt to use mmap. 0
# and anything else will force mmap off.
#mmap = true
## allow-resampler:
# Specifies whether to allow ALSA's built-in resampler. Enabling this will
# allow the playback device to be set to a different sample rate than the
# actual output, causing ALSA to apply its own resampling pass after OpenAL
# Soft resamples and mixes the sources and effects for output.
#allow-resampler = false
##
## OSS backend stuff
##
[oss]
## device: (global)
# Sets the device name for OSS output.
#device = /dev/dsp
## capture: (global)
# Sets the device name for OSS capture.
#capture = /dev/dsp
##
## Solaris backend stuff
##
[solaris]
## device: (global)
# Sets the device name for Solaris output.
#device = /dev/audio
##
## QSA backend stuff
##
[qsa]
##
## JACK backend stuff
##
[jack]
## spawn-server: (global)
# Attempts to autospawn a JACK server when initializing.
#spawn-server = false
## custom-devices: (global)
# Specifies a list of enumerated devices and the ports they connect to. The
# list pattern is "Display Name=ports regex;Display Name=ports regex;...". The
# display names will be returned for device enumeration, and the ports regex
# is the regular expression to identify the target ports on the server (as
# given by the jack_get_ports function) for each enumerated device.
#custom-devices =
## rt-mix:
# Renders samples directly in the real-time processing callback. This allows
# for lower latency and less overall CPU utilization, but can increase the
# risk of underruns when increasing the amount of work the mixer needs to do.
#rt-mix = true
## connect-ports:
# Attempts to automatically connect the client ports to physical server ports.
# Client ports that fail to connect will leave the remaining channels
# unconnected and silent (the device format won't change to accommodate).
#connect-ports = true
## buffer-size:
# Sets the update buffer size, in samples, that the backend will keep buffered
# to handle the server's real-time processing requests. This value must be a
# power of 2, or else it will be rounded up to the next power of 2. If it is
# less than JACK's buffer update size, it will be clamped. This option may
# be useful in case the server's update size is too small and doesn't give the
# mixer time to keep enough audio available for the processing requests.
# Ignored when rt-mix is true.
#buffer-size = 0
##
## WASAPI backend stuff
##
[wasapi]
## allow-resampler:
# Specifies whether to allow an extra resampler pass on the output. Enabling
# this will allow the playback device to be set to a different sample rate
# than the actual output can accept, causing the backend to apply its own
# resampling pass after OpenAL Soft mixes the sources and processes effects
# for output.
#allow-resampler = true
##
## DirectSound backend stuff
##
[dsound]
##
## Windows Multimedia backend stuff
##
[winmm]
##
## PortAudio backend stuff
##
[port]
## device: (global)
# Sets the device index for output. Negative values will use the default as
# given by PortAudio itself.
#device = -1
## capture: (global)
# Sets the device index for capture. Negative values will use the default as
# given by PortAudio itself.
#capture = -1
##
## Wave File Writer stuff
##
[wave]
## file: (global)
# Sets the filename of the wave file to write to. An empty name prevents the
# backend from opening, even when explicitly requested.
# THIS WILL OVERWRITE EXISTING FILES WITHOUT QUESTION!
#file =
## bformat: (global)
# Creates AMB format files using first-order ambisonics instead of a standard
# single- or multi-channel .wav file.
#bformat = false
##
## EAX extensions stuff
##
[eax]
## enable: (global)
# Sets whether to enable EAX extensions or not.
#enable = true
##
## Per-game compatibility options (these should only be set in per-game config
## files, *NOT* system- or user-level!)
##
[game_compat]
## nfc-scale: (global)
# A meters-per-unit distance scale applied to NFC filters. If a game doesn't
# use real-world meters for in-game units, the filters may create a too-near
# or too-distant effect. For instance, if the game uses 1 foot per unit, a
# value of 0.3048 will correctly adjust the filters. Or if the game uses 1
# kilometer per unit, a value of 1000 will correctly adjust the filters.
#nfc-scale = 1
## enable-sub-data-ext: (global)
# Enables the AL_SOFT_buffer_sub_data extension, disabling the
# AL_EXT_SOURCE_RADIUS extension. These extensions are incompatible, so only
# one can be available. The latter extension is more commonly used, but this
# option can be enabled for older apps that want the former extension.
#enable-sub-data-ext = false
## reverse-x: (global)
# Reverses the local X (left-right) position of 3D sound sources.
#reverse-x = false
## reverse-y: (global)
# Reverses the local Y (up-down) position of 3D sound sources.
#reverse-y = false
## reverse-z: (global)
# Reverses the local Z (front-back) position of 3D sound sources.
#reverse-z = false
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