nasd.conf - Configuration file for NAS servers.

nasd.conf Is a file that can be used to configure the behaiviour of the NAS server, including what devices it will attempt to use, the minimum & maximum frequencies used, if the device should be used in 8bit or 16bit mode, what fragment size and number of fragments should be used (useful for tuning the server's latency) and if the server should be verbose when starting or output debugging information. Not all options are supported for all servers, see the /etc/nas/nasd.conf.eg file for information on what options are supported for which servers.

There are up to three section in the config file. The first section deals with global options, some of which just turn on verbose messages when parsing the config file, and setting debug messages on. The remaining two sections will, if present, adjust various parameters of the input and output devices, for those server that undersand them.

verbose Sets a flag telling the server to report what it's trying to do with each setting in the config file.

debug <number> Sets the debug flag, which will provide a trace of the server's activities on stderr. Set <num> to 0 to disable debug messages, 99 for *alot* of debug messages.

mixerinit YES |" NO" Set to "YES" to "NO". Defines whether the server will init the mixer device on startup. (voxware)

OutDevType EXT |" INT" For HPUX servers, define to "EXT" to use the external output device (headphone/speakers) or "INT" for the internal output device (internal speaker). Defaults to external.

inputsection Marks the beginning of the input section, which allows various parameters of the input device to be set up.

end Marks the end of the input section or output section.

device devname Specifies what device is used. An example is device "/dev/dsp".

mixer mixername Specifies what mixer device is used. An example is mixer "/dev/mixer".

gain number Specifies the default volume (0-100). The default is 50.

maxrate number the maximum number of samples per second that we'll drive the card at.

minrate number the minimum number of samples per second that the card will be driven at.

maxfrags number The maximum number of of kernel buffers that will be used for the device. the number is dynamically adjusted as the sampling frequency varies.

minfrags number The minimum number of kernel buffers that will be used.

fragsize number The size of each buffer - note that the size must be a power of 2.

wordsize number The number of bits per sample. Allowable values are 8 and 16.

numchans number Used to decide if the card is run in stereo or mono mode. Allowable values are 1 or 2.

forcerate no |" yes" Forces the output rate to the current rate. The default is "no".

autoOpen no |" yes" Whether to open the device at init time (if ReleaseDevice = no). The default is "yes".

readwrite no |" yes" Whether or not to open the device read/write. The default is "yes". If set to "no", then for input devices, the device will be opened readonly, and for output devices, the the device will be opened writeonly.

nas(1), nasd(1), auinfo(1), auplay(1), auctl(1)

Absolutely none.

Stephen Hocking (sysseh@devetir.qld.gov.au), Jon Trulson (jon@radscan.com)