NAME¶

oss_usb - USB Audio/MIDI/Mixer driver

DESCRIPTION¶

The Open Sound System driver for USB Audio and MIDI devices.

AUDIO The Audio driver supports:

MIDI The oss_usb driver supports all MIDI devices that are compatible with the official USB MIDI specification. In addition the driver supports few devices that use their own private protocol (including some Yamaha and Midiman models).

 USB MIXER


  The USB Audio mixer is a new type of mixer that doesn't have


  the normal volume controls found on AC97 or Legacy SB devices.


  The USB audio mixer provides control for selecting the Alternate


  device setting - this usually allows the device to be switched 


  into a Professional audio mode (eg 24bit or 96Khz mode)


 ALTERNATIVE SETTINGS


  Some USB audio devices use a feature called as alternative settings for


  bandwidth management. Typically such devices have multiple high speed


  inputs and outputs that may require more bandwidth than provided by the USB


  bus. The alternative settings feature is used to select between multiple


  low speed devices or just few high speed devices.


  When the device has multiple alternative settings an "altsetting" selector


  will be visible in the control panel for the device (use ossmix(1) or


  ossxmix(1) to change it). Alternative setting OFF means that all


  audio devices are disabled. The other settings provide different combinations


  of high/medium speed devices. You can use the ossinfo(1) command


  (ossinfo -a -v3) to find out the devices supported by the currently selected


  alternative settings and the capabilities of them.

KNOWN BUGS¶

Under Linux it is necessary to run the ossdetect -d and ossdevlinks commands after an USB device has been hot-plugged. Alternatively you can execute soundoff and soundon to reload OSS.

OPTIONS¶

None

FILES¶

/etc/oss4/conf/oss_usb.conf

Device configuration file.

AUTHOR¶

4Front Technologies