Auditory Rendering Laboratory Configuration

Last updated 20 Jan 96 by eds

This document provides regularly updated configuration status for the Machine Listening Group's "Auditory Rendering Laboratory", room 484F, including a list of equipment which belongs in the ARL, patchbay and mixer configuration , and current cabling status.

Please do not alter the configuration of the ARL without checking with the rest of the group first. If you want to temporarily add a piece of equipment, use the first two inputs on the bottom patchbay, and then patch it in wherever you need it to go. There should be no need to ever disconnect anything from the patchbay anymore; please don't do it.

If you think this is incorrect, and there's something you need to do which needs some kind of patching the current configuration can't provide, please talk to Eric about it first, so the configuration can be updated to satisfy your needs.


Equipment

as of 20 Jan 96

Patchbay Configuration

We have two Tascam PB-32 patchbays on the rack. Each has 16 channels with RCA points (on the back) and 1/4" patching (on the front). Bridging between the two patchbays with a 1/4" cable works; the two in conjunction function identically to a single 32-channel patchbay. The short blue 1/4" cables hanging next to Mozart are intended for patching.

There is a logical "division of labor" between the output (bottom) rows of the two patchbays: the top patchbay normals the most-frequently-used equipment into the mixer, and the bottom one provides connectivity to the various other componeNts in the ARL which can take input. Between the two, the output from any piece of equipment (including the returns on the mixer) can be patched to the input of any other piece.

Here is the layout of the two patchbays:

Top


Bottom

Complex patching

Patches that used to require re-cabling can now be done with the existing setup. For example, Bill's spatialization demo is patched as follows: Notice that the mixer is out of this loop entirely; we could use it for effects (more reverb perhaps) by patching the Harpua output to one of the input channels; then the Aux Send channels from the mixer are normalled into the headphone amp (make sure to set Send 3/4 level on the mixer to do this).

Normals

I tried to make the normals as logical as possible, given the constraints of only 16 chennels of input on the mixer, with two of them reserved for microphone.

The thinking for normals on the bottom patchbay was the following. Monitor output and Rec Out on the mixer are most useful for making recordings, so they go to the DAT and tape recorders. It's useful to be able to monitor separate mixes on headphones, so the Aux Send, which can be pre-fader, is normalled to the headphone amp.

The Korg Prophecy is being used most frequently for Mike and Paris's research project, so it's normalled into Reich's input. The other two pairs in use are not meaningful.


Current Cabling Status

or, What isn't connected, and Why? (updated 25 Jan 96)

Here is a list of things that aren't currently connected as described above, and why not. Everything not listed below should be cabled properly. Tell Eric if you find any problems.


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Eric Scheirer <eds@media.mit.edu>
MIT Media Lab Perceptual Computing