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snd_maestro3 (4)
  • >> snd_maestro3 (4) ( FreeBSD man: Специальные файлы /dev/* )

  • BSD mandoc
     

    NAME

    
    
    snd_maestro3
    
     - ESS Maestro3/Allegro-1 bridge device driver
    
     
    

    SYNOPSIS

    To compile this driver into the kernel, place the following lines in your kernel configuration file:
    device sound device snd_maestro3

    Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:

    snd_maestro3_load="YES"
    
     

    DESCRIPTION

    The driver provides support for the ESS Maestro3 and Allegro-1 sound chips under the PCM framework. These chips are mostly found in laptop computers and feature an AC97 mixer, a multi-channel sample rate converter that can mix up to four digital audio streams in hardware, recording support, and external volume control buttons.

    The firmware for the sound processor is licensed under the GNU Public License, and thus this driver is not included in the default GENERIC kernel.  

    HARDWARE

    The driver supports the following audio devices:

     

    DIAGNOSTICS

    The hardware volume control buttons can be connected to two different pin sets (GPIO or GD) on the chip, depending on the manufacturer. The driver has no way of determining this configuration, so a hint may be used to override the default guess. The default setting for hardware volume control assumes that GD pins are wired to control the hardware volume. For systems that have the GPIO pins wired to the hardware volume control buttons, add the line ``hint.pcm.0.hwvol_config=0 '' to the file /boot/device.hints to override the default setting.  

    SEE ALSO

    sound(4), loader.conf5  

    HISTORY

    The driver first appeared in Fx 4.3 .  

    AUTHORS

    An Scott Long Aq scottl@FreeBSD.org An Darrel Anderson Aq anderson@cs.duke.edu


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    HARDWARE
    DIAGNOSTICS
    SEE ALSO
    HISTORY
    AUTHORS


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