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Diffstat (limited to 'kernel/drv/oss_madi/oss_madi.man')
| -rw-r--r-- | kernel/drv/oss_madi/oss_madi.man | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/kernel/drv/oss_madi/oss_madi.man b/kernel/drv/oss_madi/oss_madi.man new file mode 100644 index 0000000..70239fc --- /dev/null +++ b/kernel/drv/oss_madi/oss_madi.man @@ -0,0 +1,70 @@ +NAME +oss_madi - RME HDSP MADI and AES32 audio driver + +DESCRIPTION +Open Sound System driver for RME HDSP MADI and AES32 audio interfaces. + +This driver has been developed for RME HDSP MADI but it also supports +HDSP AES32. The driver has been tested under Linux and Solaris under x86 +and Sparc. + +The internal engine of the card supports 64 playback channels and 64 recording +channels. Only the first channels are connected to the actual input and +output ports of the card. + +The mixer section of the card has recording level settings for all inputs. +There is also an output mixer. Each output channel has mixer sliders for +corresponding input channel and corresponding audio playback channel. + +There is a full 64x(64+64) mixing matrix supported by the hardware. For +the time being this mixer matrix cannot be accessed directly by the +applications. However support for the SNDCTL_MIX_MATRIX_WRITE and +SNDCTL_MIX_MATRIX_READ ioctl calls can be added in the future. + +DEVICE FILES + +By default the driver will create input and output device files for +each 32 stereo pairs. This can be changed by editing the settings in +oss_madi.conf (see below). + +The application can set the devices to use 1, 2, 4, 8, 16, 32 or 64 channels. +The device file being used selects the first channel slot within the available +channels. For example pcm0 and pcmin0 sill select channel 0. Equally well +pcm1 and pcmin1 will select channel slot 2 (assuming that madi_devsize option +is set to 2). The first device (pcm0 and pcmin0) can be set to use up to 64 +channels. The last devices (pcm31 and pcmin31) only support 1 or 2 channel mode. +The other device files support channel configurations where the last channel +doesn't exceed the number of total channels (madi_maxchannels). Also the driver +will not let two device files to share any of the channels with some other +open device file. + +This channel allocation mechanism gives maximum flexibility to the user. It is +possible to use some output channels by multi channel application while the +others are available for other applications. This works as long the channel +allocations by different applications don't overlap. + +OPTIONS + +o madi_maxchannels Number of channels supported by the driver. The default + is 64 which is also the maximum. This parameter can + be set to a lower value if full 64 channels are not + required. With less channels the mixer/control panel + interface will require less space on screen. +o madi_devsize By default this parameter is set to 2 which means that + a device file will be created for each stereo channel + pair. Possible values are 1, 2, 4, 8, 16, 32 or 64. + +LIMITATIONS + +o The current driver doesn't support all control panel features of the card. +For example sampling rate is fixed to 48 kHz. More features will be added +on contract. + +o Use of mmap() is and will not be supported. +o Virtual mixer is not supported (yet). + +FILES +CONFIGFILEPATH/oss_madi.conf Device configuration file. + +AUTHOR +4Front Technologies |