Openmixer

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openmixer

A fully-extensible software-based dedicated mixing console emulation.

Requirements

What do we want to do when we get to the Studio that houses the OpenMixer system:

  • login to the studio workstation, press a button in the UI that says "Workstation" and have all 24 channels of the soundcard connected to all 24 speakers, control overall volume with a fader labeled "Master"
  • walk to the dvd player, insert a DVD disk, press a button in the UI that says "DVD" and have the DVD play in 5.1, control overall volume with a fader labeled "Master"
  • connect a laptop for stereo playback by connecting to a 1/8" plug, press a button in the UI that says "Laptop" and have stereo playback properly routed, control overall volume with a fader labeled "Master"
  • connect a laptop for 8 channel playback by connecting multiple outputs to 1/4" plugs, press a button in the UI that says "Laptop8" and have 8 channels routed to the mid 8 channel speaker ring, control overall volume with a fader labeled "Master"

Hardware

The OpenMixer software runs in a dedicated fanless computer. Zalman has discontinued their TNN300 and TNN500AF products so we have to look for other options.

The audio input and output is controlled by an RME HDSP Madi PCI card (http://www.rme-audio.de/en_products_hdsp_madi.php) which provides 64 inputs, 64 outputs, MIDI i/o, work clock i/o, etc. It uses up 2 back panel slots but is inserted into one PCI slot. Another option is the RME PCIe Madi PCI Express card (http://www.rme-audio.de/en_products_hdspe_madi.php) PCI Express card (same capabilities, different bus).

The MADI output is split into ADAT outputs using the RME ADI-648 ADAT/MADI converter (http://www.rme-audio.de/en_products_adi_648.php) (we get 8 ADAT pipes from it). The ADAT pipes can be connected directly to other computers or equipment, or go through ADAT D/A and/or A/D converters to connect to analog equipment.

Software

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