Ajv(1)								       Ajv(1)



NAME
  Ajv -	a network-transparent audio server for JVideo.

SYNOPSIS

  The AudioFile	audio server is	a network transparent  system developed	at
  Digital CRL.	for using JVideo audio hardware	in a distributed environment.

DESCRIPTION

  Ajv is an AudioFile server with JVideo device	dependent support.

STARTING UP
  Ajv [:portOffset] [options] &

OPTIONS

  -help

       Use the help switch to determine	device independent arguments.

  -device device

       Specifies the name of the JVideo	 audio special device file.  If	this
       switch is not used, the Ajv audio server	will default to	the device
       specified by the	AUDIO_DEVICE environment variable or the /dev/jva0
       device.

  -ukernel lodfile

       Specifies an alternate DSP56001 absolute	lodfile.  If ukernel is	not
       specified, the server checks for	the AF_UKERNEL environment variable.
       If neither is specified,	the server looks for
       /usr/local/lib/AF/lodfiles/AFjvmain.lod.

  -hrate <#>

       Causes the server to set	the audio hardware sampling rate.  The
       default sampling	rate is	8000 Hz.  The JVideo hardware supports 8000,
       16000, 22000, 32000, 44100, and 48000 Hz	rates.

AUDIO DEVICES

  The Ajv 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.  When the	server is running at 8000 Hz, the
  supported audio data type is MU255.  Otherwise, the supported	audio data
  type is LIN16.



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 con-
  nect 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 af-
  bugs@crl.dec.com and include the source code if possible.

SEE ALSO

  AudioFile(1),	Aaxp(1), Amaxine(1), Alofi(1), Ajv(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