This is the only high quality sound device we know of that has response down to 0 Hz. It is thus very suited for low frequency measurements. Unfortunately these cards are not produced anymore, but we have a few cards in stock, and it should be possible to get a card used. If you are using a Turtle Beach Tahiti or Monterey sound device, you must download and install the latest drivers <tah95dx.zip> to make the WinMLS Audio Mixer work properly under Windows 95. If you want to use this card under Windows NT, special drivers can be downloaded. We have tested these and they worked fine.