oss_cmi878x(7) [debian man page]
oss_cmi878x(7) OSS Devices oss_cmi878x(7) NAME
oss_cmi878x - CMedia CMI8788 audio driver. DESCRIPTION
Open Sound System driver for CMedia Electronics CMI8788 audio CMI87xx device characteristics: o 8/16/24/32 bit playback/record o mono/stereo/4ch/5.1/7.1 playback o 8KHz to 192Khz sample rate. The CMedia 8788 device provides 3 types of devices. The first devices is a Multichannel full duplex device. The second device provides Front Panel audio access and the SPDIF device provide SPDIF (Digital) audio I/O. MIXER PANEL The CMedia chip provides some unique features that are set up by the Mixer chip. There are 3 mixer devices presented to the user. Main Mixer Panel (/dev/mixer0) o Master Mixer panel is for controlling output volumes for each of the 8 channels. o Monitor buttons will allow you to monitor the input from the Rear Panel inputs, Front Panel Inputs and SPDIF IN. o Speaker-Spread function duplicates the front channel output on all 8 speakers. o SPDIF Loopback simply takes SPDIF Input and Plays it out the SPDIF Output. panel. AC97 Input Mixer Panel (/dev/mixer1) This mixer panel is used to switch between the various inputs like line-in, mic, cd. When the Rear Panel Monitor button is check marked in the Main mixer panel, the IGAIN slider in this panel controls the level of the input that can be hear on the speakers. AC97 Front Panel Mixer (/dev/mixer2) This mixer controls the front panel ac97 device. It can be used to control all the volumes and inputs as well as SPDIF output on the front panel device. OPTIONS
None FILES
/etc/oss4/conf/oss_cmi878x.conf Device configuration file AUTHOR
4Front Technologies 16 December 2012 oss_cmi878x(7)
Check Out this Related Man Page
oss_usb(7) OSS Devices oss_usb(7) 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: o 8-96Khz Playback/Recording o 8 or 16 or 32 bits o 2, 4, 6 or 8 channel audio. o SPDIF digital output and Input o AC3 passthrough o Volume control and device input mixer 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 oss- mix(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 16 December 2012 oss_usb(7)