# Open Sound System configuration file
# Remove the '#' in front of the option(s) you like to set.
#
# 
# Detect Trace will trace the audio device detection and operation. However
# this feature should only be enabled when requested by the technical support
# personnell.
# 
#detect_trace=0
#
# 
# Max intrate sets up the maximum number of interrupts/second. This
# in turn sets up the minimum buffer fragment size. The default value is 100
# It equals to about 50 fps frame rate which should be good for most 
# applications (including games). However some special applications
# may require lower latencies. In such cases a higher value such as 500 or 1000
# may be needed. The minimum latency will be roughly 2/max_intrate
# seconds. However the exactl latency depends on what the application has
# requested using ioctl(SNDCTL_DSP_SETFRAGMENT). A value of zero means
# OSS doesn't try to limit interrupt rate.
# 
# Lower latencies require higher interrupt rates which in turn causes higher
# system overhead. In addition using max_intrate values higher than system's
# internal clock rate (HZ) may not make any actual improvement.
# 
# Some devices use fixed fragment size and this parameter will not have any
# effect with them. For example the Digi32 and Digi96 devices work in this way.
# 
#max_intrate=100
#
# 
# The src_quality setting defines the precision of the software based sample
# rate conversion algorithm used by OSS. This setting doesn't affect possible
# hardware level conversions done by the devices themselves. Using higher
# quality setting gives better quality while lower settings consume less
# CPU time.
# 
# Possible values are:
# 0 - D lowest quality (normally equals to 1=low quality)
# 1 - L  low quality    (spline interpolation)
# 2 - M  medium quality (lagrange interpolation)
# 3 - H  high quality   (DEFAULT)
# 4 - HX high quality   (high quality with extra precision)
# 5 - P  production quality
# 6 - PX production quality (prod quality with extra precision)
# 
#src_quality=3
#
# 
# When set to 1 this option enables the speaker power amplifier feature of
# AC97 codec (if available). Some boards have this inverted, so if necessary
# this feature can be disabled by setting this option to 0.
# Affects all AC97 based audio devices in the system.
# Default: -1=autodetect correct setting.
# 
#ac97_amplifier=-1
#
# 
# When set to 1 this option enables independent recording source
# selection for the left and the right channel on AC97 devices. In this way
# it's possible to record audio streams so that (for example) the left
# channel signal comes from the microphone and the right channel signal from
# line-in. However when this option is enabled it's only possible to
# select the recording source by using a fully OSS 4.0 compatible mixer
# program such as ossxmix.
# 
#ac97_recselect=0
#
# 
# By default OSS will let applications to use sampling rates and formats
# that are not supported by the hardware. Instead OSS performs the necessary
# format conversions in software. Applications that don't tolerate this kind
# of conversions usually disable them by using features of the OSS API
# (SNDCTL_DSP_COOKEDMODE). If this option is set to 0 then the format
# conversions will be disabled for all applications and devices unless the
# application explicitly enables them. This option should not be changed
# without wery strong reason.
# 
#cooked_enable=1
#
# 
# By default OSS will allocate audio DMA buffers with some system dependent
# default size (usually 64k but sometimes smaller). It is possible to change
# this default allocation by setting this option. Value of 0 means that the
# default size will be used. Value between 16 and 128 (kilobytes) can be used
# if the default size is not suitable for some reason. This option must not be
# changed unless it's absolutely necessary.
# 
#dma_buffsize=0
#
# 
# OSS version 4.0 and later use two level device model where multiple audio
# engines supported by the device (hardware mixing or vmix) are hidden behind
# the same device file. When this device file is opened OSS will connect the
# application to the first available subdevice. In this way multiple 
# applications can use the same device file at the same time.
# 
# If this option is set to 0 OSS will use the earlier (OSS 3.x) device scheme
# where all devices are directly visible to the applications. This may be
# necessary with some custom applications that depend on the old
# behaviour.
# 
#flat_device_model=0
#
# 
# The virtual mixer subsystem can be disabled by setting this configuration
# option to 1.  By default the value is 0 which enables virtual mixer.
# 
#vmix_disabled=0
#
# 
# Optionally the virtual mixer subsystem can create special loopback audio
# devices that can be used to record the output mix sent to the device.
# This option tells how many loopback devices will be created (0, 1 or 2).
# If there are multiple audio devices in the system the all of them will have
# the same number of loopback devices. This setting should be left to 0 unless
# there are specific reasons to enable the loopback devices.
# 
#vmix_loopdevs=0
#
# 
# By default (0) the low level drivers for most sound cards will automatically
# attach virtual mixer (vmix) to the primary audio devices of the cards.
# In some situations it may be necessary to attach virtual mixer using 
# nonstandard parameters. If vmix_no_autoattach is set to 1 then user
# can use vmixctl attach command to attach virtual mixer manually to
# the device(s).
# 
#vmix_no_autoattach=0
#
# 
# By default the O_EXCL open() flag can be used to bypass the virtual mixer.
# Setting excl_policy to 1 or 2 makes OSS ignore O_EXCL. A setting of 1
# ignores O_EXCL from all but root processes, while a setting of 2 always
# ignores O_EXCL. 
# 
#excl_policy=0
#
# 
# By default mixer volume controls will be set to audible levels
# when OSS drivers are loaded. However in some systems it may
# be necessary to default to lower levels to avoid feedback or 
# noise. Set mixer_muted to 1 to use low default levels and to
# 0 to select audible levels.
# 
# Note that just few OSS drivers support this option.
# 
#mixer_muted=0
