Speaker setups

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The Motion lab at the Department of Music University of Oslo:

48 channel setup : 48 Truss mounted Genelec 8020B active speakers in a 3 dimensional rectangular array with flexible speaker configurations and spatialization techniques available.

  • 14 speakers at lower plane (1-14)
  • 14 speakers at horizontal plane (15-28)
  • 14 speakers at upper plane (29-42)
  • 6 speakers at upmost plane/ceiling (43-48)
  • Mac pro running Max 6 and the Jamoma and Ircam Spat libraries.
  • SSL MADI 64 ch.card.
  • 2 x SSL Alphalink AD/DA converters with Dsub-XLR to speakers.

To use: Swithing on/off procedure:

  • Turn on Macpro, login.
  • Swith on the power sequencer mounted at the top of the rack, which will turn on the preamps, converters and speakers.
  • Start Max 6 and load the labspeakersetup patch or one of the Spatialization templates according to your need (see descriptions in the below).

To switch off, reverse the procedure.

Using the Jamoma Spatialization templates: In Max, ->File menu, ->Open browse to: /Users/fourmslab/Desktop/JamomaSpatTemplates/ -> JamomaSpatTemplates.maxproj.

The templates demonstrates the following spatialization techniques as implemented in the Jamoma package:

In each of the patches you have to load a specific speaker configuration. The following are standard:

  • SetupHorizontal: 14 speakers at the horizontal plane. (14) 2D
  • SetupUpper: 14 speakers at the Horizontal and 14 at the upper plane (28) 3D
  • SetupUpperandUpmost: 14 speakers at the horizontal, 14 at the upper and 4 at the upmost plane. (32). 3D
  • SetupTunnels: Speakers are arranged in columns and rows from lower,horizontal,upper upmost,upper,horizontal and lower. (32) 3D
  • SetupQuad: 4 speakers (corners) at the Horizontal plane. 2D
  • SetupCube: 4 speakers Horizontal and 4 speakers at the Upper plane (8) 3D
  • SetupCube2:4 speakers at Lower, 4 speakers at Horizontal and 4 speakers at the Upper plane. (12) 3D

( Custom setups can be entered as a script, on how to do this, see description in pathces)

However at this time of writing, In Jamoma there is a 32 channel limit. If all 48 channels is needed then use IRCAMĀ“s Spat lib instead.

Using IRCAM Spat templates:

Spat is a highly flexible library and contains a vast number of helpful tools for spatialization. Please have a look at the main patch named IRCAM Spat Overview - for tutorials and examples on different setups. Spat also has some perceptual modules built via the Spat.spat /Spat.oper modules such as airabsorbent, simulation of doppler, distance, reverb/room etc.

10 channel setup

Up to 10 Genelec 8020B additional speakers on micstands can be added to the 48 system or used as a "standalone" smallscale system. As the 48 speaker rig does offer many possible and flexible configurations, It is however not possible to arrange the speakers in a circle. With these additional speakers one could set up a traditional 8 speaker circle or any other configuration not provided already. Note that the speakers must connect to a external sound card/DA converter, as at this point the SSL converters and stageboxes are configured for the 48 speaker system. If this system must be synced with the 48 speaker rig, a clock signal via, BNC, spdif or Toslink can be used from external card to the SSL

8 channel setup

Yamaha. mobile

24 channel setup

Based on 6 Logitech x-540 systems (leaving out the center channel speakers) and 2 AudioFire 12 sound cards.

The two sound cards can be used in Max/MSP by using the aggregate audio devices functionality in OS X. NB: you have to be logged in as an administrator to be able to set this up. You also need to select the same sampling rate in both sound cards, otherwise they can't be aggregated. Then the two devices should show up as one aggregated device in Max/MSP.

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