sonic surrounds

LCS Matrix 3
- Last I looked at this, it had some form of 2D panning to the surface of arbitrary 3D speaker arrays - depth was not simulated, nor was acoustics.

Lake Huron Digital Audio Convolution Workstation
- I think it’s still available, but there seems to be no web presence for it anymore.
update: there’s a webpage here, though it doesn’t seem to be linked to from anywhere.
This hardware is rather old now though, so while it can still do the longest convolutions with the lowest latency in a turnkey hardware product, it is weak in general purpose spatialization even compared to open source software solutions.

very damn cool…
check out these links:
great video demo
just DIY project log
Mitsubishi Electric Research Labs

http://www.epanorama.net/circuits/microphone_powering.html

includes your basic 47 kOhm resistor on the hot line to power an electret capsule from phantom power.
other reasons to visit: circuits for battey powered electrets, “plug-in” powered (eg minidiscs), phantom powered… and great ascii-art circuit diagrams.

The Catalogue number at sound professionals is SP_CMC-8
Which is a kit type thing with various options.
http://www.soundprofessionals.com/cgi-bin/gold/item/SP-CMC-8

Here is a link to just the omnidirectional i screwable mic element:
http://www.soundprofessionals.com/cgi-bin/gold/item/AT-P12100

It was a bit more pricey than I remembered basically for the kit cable windscreen + 1 set of elements $250US
the screw in mics are depending on type $60US each so about $120US a pair.

They also have cheaper ones that these mics and also a set that are much more expensive.

Search Digikey for “unidirectional” to get these results.

The Digikey catalogue page 1278 lists all the unidirectional electret capsules available from Digikey. pdf here.

One of the likeliest available candidates is the Panasonic WM-56A103, though the frequency response is only 100Hz-16kHz.
…but note that as stated by Henry Walmsley on his cheap soundfield mic site, the WMA-55A103 is the preferred model (back electret) if you can get it.

Knowles Acoustics also lists some unidirectional electrets here, but not all seem to be available from Digikey even though they are an official Knowles distributor.