IRIS Kits

There are two types of hardware kits: one produced from 2014 to 2018 which uses a MOTU 4pre USB audio interface (Revision 1), and a second released in 2019 which employs a Zoom F4 recorder/interface (Revision 2).

Revision 2

A second revision IRIS kit was released in 2019. Unlike the first kit, the hardware components are designed to be left in the case and operated in place.

_images/kit2contents.jpg _images/rev2kitcable.jpg

This kit is built in a Pelican Storm iM2400 case with custom foam cut-out. It includes:

Receiver

  • Core Sound TetraMic microphone array
  • Core Sound PPAc transmitter and receiver system
  • 1.8 m Core Sound TetraMic cable (6-pin female mini-XLR to 6-pin male standard XLR)
  • Rycote microphone stand suspension mount for TetraMic

Audio Interface

  • Zoom F4 recorder/USB audio interface
  • International power supply (F4 may also be battery powered)
  • 32 GB SD card
  • Short 3.5 mm to 3.5 mm stereo jack loopback cable

Tip

The output of the Zoom F4 is a balanced line-level over a male XLR connector.

Cable

30 m shielded Cat5e (STP) cable with Neutrik etherCON connectors.

The STP Cat5e cable used in both types of IRIS kits is a shielded Ethernet cable, but does not pass digital signals. It is being used as an analog 4-channel multi-core “snake”. Common Ethernet cables which are not shielded (UTP) will not work with IRIS.

Tip

Lengths of STP cable longer than 30 metres are also available, which may be necessary in very large spaces where the source and receiver are located far apart. IRIS has been tested with up to 90 metres of STP cable without any issues, but longer than this is not advised. Multiple STP cables may be joined together (using Neutrik NE8FF etherCON couplers).

Software

  • Licence for IRIS software on HASP USB protection dongle
  • IRIS software and calibration data on USB key

Note

A sound source is not included in the kit. The type of loudspeaker required depends on the type of measurement. The output of the Zoom F4 is a male XLR connector (balanced line level). Please see Source for more details.

Revision 1

The first revision IRIS kit, now discontinued, was shipped in a Pelican Storm iM2400 case, consisting of:

  • Core Sound TetraMic microphone array
  • Core Sound PPAc transmitter
  • 1.8 m Core Sound TetraMic cable (6-pin female mini-XLR to 6-pin male standard XLR)
  • IRIS CBM (custom-made receiver for Core Sound PPAc transmitter)
  • Rycote microphone stand suspension mount for TetraMic
  • 30 m shielded Cat5e (STP) cable with Neutrik etherCON connectors
  • MOTU 4pre USB audio interface
  • A small metal U link to provide a loopback connection between the RCA S/PDIF connectors
  • Licence for IRIS software on HASP USB protection dongle
  • IRIS software and calibration data on USB key

kit1a kit1b

Tip

The main output of the MOTU 4pre is a balanced line-level over a female TRS connector.

Additional Equipment

In addition to one of the IRIS kits above, you must provide the following equipment:

  • Laptop computer (requirements)
  • Microphone stand
  • Source loudspeaker, power amplifier and necessary cabling (details here)
  • AC power extension leads
  • Headphones for checking microphone signals
  • Paper and pen
  • Tape measure
  • Electrical insulation tape (for attaching PPAc transmitter to microphone stand
  • Hearing protection