1============================================================== 2Alsa driver for Digigram miXart8 and miXart8AES/EBU soundcards 3============================================================== 4 5Digigram <alsa@digigram.com> 6 7 8GENERAL 9======= 10 11The miXart8 is a multichannel audio processing and mixing soundcard 12that has 4 stereo audio inputs and 4 stereo audio outputs. 13The miXart8AES/EBU is the same with a add-on card that offers further 144 digital stereo audio inputs and outputs. 15Furthermore the add-on card offers external clock synchronisation 16(AES/EBU, Word Clock, Time Code and Video Synchro) 17 18The mainboard has a PowerPC that offers onboard mpeg encoding and 19decoding, samplerate conversions and various effects. 20 21The driver don't work properly at all until the certain firmwares 22are loaded, i.e. no PCM nor mixer devices will appear. 23Use the mixartloader that can be found in the alsa-tools package. 24 25 26VERSION 0.1.0 27============= 28 29One miXart8 board will be represented as 4 alsa cards, each with 1 30stereo analog capture 'pcm0c' and 1 stereo analog playback 'pcm0p' device. 31With a miXart8AES/EBU there is in addition 1 stereo digital input 32'pcm1c' and 1 stereo digital output 'pcm1p' per card. 33 34Formats 35------- 36U8, S16_LE, S16_BE, S24_3LE, S24_3BE, FLOAT_LE, FLOAT_BE 37Sample rates : 8000 - 48000 Hz continuously 38 39Playback 40-------- 41For instance the playback devices are configured to have max. 4 42substreams performing hardware mixing. This could be changed to a 43maximum of 24 substreams if wished. 44Mono files will be played on the left and right channel. Each channel 45can be muted for each stream to use 8 analog/digital outputs separately. 46 47Capture 48------- 49There is one substream per capture device. For instance only stereo 50formats are supported. 51 52Mixer 53----- 54<Master> and <Master Capture> 55 analog volume control of playback and capture PCM. 56<PCM 0-3> and <PCM Capture> 57 digital volume control of each analog substream. 58<AES 0-3> and <AES Capture> 59 digital volume control of each AES/EBU substream. 60<Monitoring> 61 Loopback from 'pcm0c' to 'pcm0p' with digital volume 62 and mute control. 63 64Rem : for best audio quality try to keep a 0 attenuation on the PCM 65and AES volume controls which is set by 219 in the range from 0 to 255 66(about 86% with alsamixer) 67 68 69NOT YET IMPLEMENTED 70=================== 71 72- external clock support (AES/EBU, Word Clock, Time Code, Video Sync) 73- MPEG audio formats 74- mono record 75- on-board effects and samplerate conversions 76- linked streams 77 78 79FIRMWARE 80======== 81 82[As of 2.6.11, the firmware can be loaded automatically with hotplug 83 when CONFIG_FW_LOADER is set. The mixartloader is necessary only 84 for older versions or when you build the driver into kernel.] 85 86For loading the firmware automatically after the module is loaded, use a 87install command. For example, add the following entry to 88/etc/modprobe.d/mixart.conf for miXart driver: 89:: 90 91 install snd-mixart /sbin/modprobe --first-time -i snd-mixart && \ 92 /usr/bin/mixartloader 93 94 95(for 2.2/2.4 kernels, add "post-install snd-mixart /usr/bin/vxloader" to 96/etc/modules.conf, instead.) 97 98The firmware binaries are installed on /usr/share/alsa/firmware 99(or /usr/local/share/alsa/firmware, depending to the prefix option of 100configure). There will be a miXart.conf file, which define the dsp image 101files. 102 103The firmware files are copyright by Digigram SA 104 105 106COPYRIGHT 107========= 108 109Copyright (c) 2003 Digigram SA <alsa@digigram.com> 110Distributable under GPL. 111