28-03-2021

Digigram Driver

Digigram <alsa@digigram.com>

Digigram Vx222e Driver
Driver Digigram Vx222e
Digigram Driver Ed
Driver Digigram Vx222v2
Digigram Digital
Digigram Driver Updater

GENERAL¶

The miXart8 is a multichannel audio processing and mixing soundcardthat has 4 stereo audio inputs and 4 stereo audio outputs.The miXart8AES/EBU is the same with a add-on card that offers further4 digital stereo audio inputs and outputs.Furthermore the add-on card offers external clock synchronisation(AES/EBU, Word Clock, Time Code and Video Synchro)

In other company news, Digigram has released a new driver set, Version 2.00g, for its miXart 8 range of multichannel sound cards, which includes miXart 8, miXart 8 AES/EBU and miXart 8 CN. Digigram, the desire to innovate Digigram develops mission-critical solutions dedicated to the remote broadcast, production, and safe distribution of audio content. Digigram sound cards, IP audio codec solutions, cloud applications, and networking infrastructure are used in thousands of broadcast, AV, and industrial applications.

The mainboard has a PowerPC that offers onboard mpeg encoding anddecoding, samplerate conversions and various effects.

The driver don’t work properly at all until the certain firmwaresare loaded, i.e. no PCM nor mixer devices will appear.Use the mixartloader that can be found in the alsa-tools package.

VERSION 0.1.0¶

One miXart8 board will be represented as 4 alsa cards, each with 1stereo analog capture ‘pcm0c’ and 1 stereo analog playback ‘pcm0p’ device.With a miXart8AES/EBU there is in addition 1 stereo digital input‘pcm1c’ and 1 stereo digital output ‘pcm1p’ per card.

Formats¶

U8, S16_LE, S16_BE, S24_3LE, S24_3BE, FLOAT_LE, FLOAT_BESample rates : 8000 - 48000 Hz continuously

Digigram Vx222e Driver

Playback¶

For instance the playback devices are configured to have max. 4substreams performing hardware mixing. This could be changed to amaximum of 24 substreams if wished.Mono files will be played on the left and right channel. Each channelcan be muted for each stream to use 8 analog/digital outputs separately.

Capture¶

There is one substream per capture device. For instance only stereoformats are supported.

Mixer¶

<Master> and <Master Capture>: analog volume control of playback and capture PCM.
<PCM 0-3> and <PCM Capture>: digital volume control of each analog substream.
<AES 0-3> and <AES Capture>: digital volume control of each AES/EBU substream.
<Monitoring>: Loopback from ‘pcm0c’ to ‘pcm0p’ with digital volumeand mute control.

Driver Digigram Vx222e

Rem : for best audio quality try to keep a 0 attenuation on the PCMand AES volume controls which is set by 219 in the range from 0 to 255(about 86% with alsamixer)

NOT YET IMPLEMENTED¶

external clock support (AES/EBU, Word Clock, Time Code, Video Sync)
MPEG audio formats
mono record
on-board effects and samplerate conversions
linked streams

Digigram Driver Ed

FIRMWARE¶

[As of 2.6.11, the firmware can be loaded automatically with hotplug: when CONFIG_FW_LOADER is set. The mixartloader is necessary onlyfor older versions or when you build the driver into kernel.]

For loading the firmware automatically after the module is loaded, use ainstall command. For example, add the following entry to/etc/modprobe.d/mixart.conf for miXart driver:

Driver Digigram Vx222v2

(for 2.2/2.4 kernels, add “post-install snd-mixart /usr/bin/vxloader” to/etc/modules.conf, instead.)

Digigram Digital

The firmware binaries are installed on /usr/share/alsa/firmware(or /usr/local/share/alsa/firmware, depending to the prefix option ofconfigure). There will be a miXart.conf file, which define the dsp imagefiles.

Digigram Driver Updater

The firmware files are copyright by Digigram SA

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