Aj300(1) Aj300(1) NAME Aj300 - a network-transparent audio server for Digital's J300 Sound and Motion Board. SYNOPSIS The AF audio server is a network transparent system developed at Digital CRL. Aj300 permits using the J300 Sound and Motion Board audio hardware in a distributed environment. DESCRIPTION Aj300 is an AF server with J300 device dependent support. STARTING UP Aj300 [:portOffset] [options] & OPTIONS -help Use the help switch to determine device independent arguments. -device device Specifies the name of the J300 board audio special device file. If this switch is not used, the Aj300 audio server will default to the device specified by the AUDIO_DEVICE environment variable or the /dev/ama0 device. -hrate <#> Causes the server to set the audio hardware sampling rate. The default sampling rate is 8000 Hz. The DDA supports the following hardware sampling rates: 8000, 11025, 16000, 22050, 32000, 44100, and 48000 Hz rates. AUDIO DEVICES The Aj300 audio server presents three audio devices to client applications. These audio devices map to the audio hardware using stereo data, left chan- nel only, and right channel only. The sampling rate of the audio devices is set by the hrate switch. The default audio data type is LIN16. AF conversion services support other datatypes. CONNECTION NAME From the user's prospective, every AF server has an audio connection of the form: hostname:portOffset This information is used by the application to determine how it should connect to the server. hostname The hostname specifies the name of the machine to which the audio device is physically connected. portOffset The portOffset is used to identify the audio server's port on host- name. For example, to simultaneously run two audio servers on a given host, you might select 0 or 1 for portOffset. If the connection name to an audio server is not specified, then the environment variables AUDIOFILE or DISPLAY will be used. ACCESS CONTROL The sample server provides two types of access control: an authorization protocol which provides a list of ``magic cookies'' clients can send to request access, and a list of hosts from which connections are always accepted. BUGS If you encounter a repeatable bug, please submit a problem report to () and include the source code if possible. SEE ALSO AF(1), Aaxp(1), Amaxine(1), Alofi(1), Ajv(1), Amsb(1), Aj300(1), aplay(1), arecord(1), apass(1), aset(1), abrowse(1), afft(1), ahost(1), aphone(1), aprop(1), ahs(1), axset(1), xpow(1), afxctl(1), aname2num(1), alsatoms(1), aevents(1), abob(1) COPYRIGHT See the COPYRIGHTS file. Copyright 1991-1994, Digital Equipment Corporation and the Massachusetts Institute of Technology. AUTHORS Digital Cambridge Research Lab