audio1575 man page on SunOS

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audio1575(7D)			    Devices			 audio1575(7D)

NAME
       audio1575  -  Uli  M1575	 Super	South  Bridge audio digital controller
       interface.

DESCRIPTION
       The audio1575 device uses the Uli M1575 AC97-compatible	audio  digital
       controller  and an AC-97 Codec to implement the audio device interface.
       This interface allows analog only inputs and outputs.

API
       This interface is described in the audio(7I) and mixer(7I) man pages.

   Driver Versions
       Applications that open /dev/audio may use the AUDIO_GETDEV ioctl(2)  to
       determine  which	 audio device is being used. The audio1575 driver will
       return the string SUNW,audio1575 in the name field of the  audio_device
       structure. The version field contains the letter a and the config field
       contains the string onboard1.

	Platform     Ver.     Out    H. Phone	 Speaker     In	     Mic      CD
	 Sun A70
       Workstation     a       Y	Y	    Y	      Y	      Y	       Y

       Key to the above table: Ver = Version. Out = Line Out. Speaker = Inter‐
       nal Speaker. In = Line In. Mic. = Microphone. CD = CD-ROM.

       The audio1575 device provides support for  the  internal speaker, head‐
       phone, line out,	 line  in,  and	 microphone.  The  play.mod_ports  and
       record.mod_ports	 fields	 of  the audio_info structure  (see audio(7I))
       indicate which ports may be manipulated.

   Audio Mixer Mode
       This driver supports the mixer mode. Compat mode is supported only  for
       Sampling	 Rate  (8Khz-48Khz), Encoding (16 Bit linear (PCM)), and Chan‐
       nels (Stereo) configurations.

   Audio Data Formats
       The audio1575 device  natively  supports	 16-bit	 linear	 encodings  in
       stereo. With the mixer enabled, a continuous range of sample rates from
       8000 Hz to 48000 Hz is supported. With the  mixer  disabled,  the  same
       sample rates are supported but only for stereo 16 bit linear PCM encod‐
       ing. The device can be opened for simultaneous play and record  whether
       the mixer is enabled or not.

   Sample Granularity
       Because	the  audio1575	device manipulates  buffers of audio data, the
       reported input and output sample counts will vary at any time from  the
       actual  sample count by no more than the size of the buffers the driver
       is transferring. Programs should not rely on the absolute  accuracy  of
       the play.samples and record.samples fields of the audio_info structure.

   Interrupt Rate
       The  driver  determines	how  often  play  and record interrupts should
       occur. For playing audio, this determines how often and how much	 audio
       is  requested from the audio mixer. The impact of interrupts on record‐
       ing is minimal, however, if a very small read buffer size is  set,  the
       record  interrupt  rate	should be increased to prevent the buffer from
       overflowing. You can tune the play and record interrupt rates using the
       /kernel/drv/audio1575.conf file.

   Audio Status Change Notification
       As  described  in the audio(7I) and mixer(7I) man pages, it is possible
       to request asynchronous notification of changes	in  the	 state	of  an
       audio device.

ERRORS
       All audio1575 errors are described in the audio(7I) man pages.

FILES
       /dev/audio

	   Symbolic link to the system's primary audio device (not necessarily
	   an audio1575 device).

       /dev/audioctl

	   Control device.

       /dev/sound/0

	   Represents the first audio device on the system (not necessarily an
	   audio1575 device).

       /dev/sound/0ctl

	   Audio control.

       /usr/share/audio/samples

	   Audio sample files.

       /kernel/drv/audio1575.conf

	    Audio1575 driver configuration file.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌────────────────────┬──────────────────────────────────────┐
       │  ATTRIBUTE TYPE    │		ATTRIBUTE VALUE		   │
       ├────────────────────┼──────────────────────────────────────┤
       │Architecture	    │SPARC-based systems		   │
       ├────────────────────┼──────────────────────────────────────┤
       │Availability	    │SUNWaudd, SUNWauda			   │
       ├────────────────────┼──────────────────────────────────────┤
       │Stability level	    │Evolving				   │
       └────────────────────┴──────────────────────────────────────┘

SEE ALSO
       mixerctl(1),  sdtaudiocontrol(1),  ioctl(2),  attributes(5), audio(7I),
       mixer(7I), streamio(7I)

       Uli M1575 Super South Bridge Data Sheet Data Sheet— Uli USA Inc.

       AD1981B AC '97 SoundMAX(R) Codec Data Sheet— Analog Devices Inc.

       http://www.sun.com/io

DIAGNOSTICS
       In addition to being logged, the following messages may appear  on  the
       system console:

       init_state() play interrupt rate set too low.

	   The play interrupt rate specified in audio1575.conf is set too low.
	   It has been reset to the rate  specified  in	 the  message.	Update
	   audio1575.conf to a higher play interrupt rate.

       init_state() play interrupt rate set too high.

	   The	play  interrupt	 rate  specified  in audio1575.conf is set too
	   high. It has been reset to  the  rate  specified  in	 the  message.
	   Update audio1575.conf to a lower play interrupt rate.

       init_state() record interrupt rate set too low.

	   The	record	interrupt  rate specified in audio1575.conf is set too
	   low. It has been reset to the rate specified in the message. Update
	   audio1575.conf to a higher record interrupt rate.

       init_state() record interrupt rate set too high.

	   The	record	interrupt  rate specified in audio1575.conf is set too
	   high. It has been reset to  the  rate  specified  in	 the  message.
	   Update audio1575.conf to a lower record interrupt rate.

SunOS 5.10			  4 Nov 2005			 audio1575(7D)
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