CORPSound Technical Information

All the shows we personlly record are produced in the following way:

Recording Equipment

Tim: Our recordings are made live using the ever-popular (because it is the only DAT in its class available) Sony TCD-D7 portable DAT recorder, sampling at 48 kHz, 16 bit. The microphone used is a stereo electret condenser microphone, utilizing a near-coincident cardioid stereo pickup pattern. This is some little cheap piece of crap mic made by AIWA for their walkmans... but, hey: IT WORKS! Setting the levels manually allows for near CD quality dynamic range on the recordings... if you don't mind the crowd noise.

These recordings will sound most realistic cranked over your favorite pair of loudspeakers. Time to hook up the computer to the stereo system! They're pretty good on good headphones, and compatable with mono, too.

Doug: What all this means is that our stuff sounds pretty darn good.

Encoding

Doug: We use the MPEG layer 2 audio standard for the encoding of audio bitstreams. The acutual encoder was found in a "mpegaudio" archive, written in the C programming language by ISO, the International Organization for Standardization. The encoding was done at 44.1 kHz, 16 bits, 128 kHz bit rate, in stereo. We use a Dec AlphaStation 200 4/233 running OSF/1 3.2 for both the digitizing and the encoding of the audio samples. The raw data from stereo, 44.1 kHz, 16 bit PCM sample attains approximately 12:1 compression. The MPEG-2 scheme uses a somewhat lossy compression, but the space savings is incredible. To play our MPEG-2 samples, you'll need your own MPEG-2 decoder. You can go to IUMA for lists of MPEG-2 decoders for Windows, Mac, or UNIX computers. Download whichever one works best for you.

We will soon be providing short clips in the SUN .au format, as soon as we find good short clips to provide! Since the .au format is only mono 8 kHz, it's not worth digitizing a whole show with, at least in our opinion.

Tim: ummmm.... basically Doug screws around for hours on the computer until he gets it to work right! So you get a pretty decent sounding file, that you won't have to devote half the planet's computing resources to playing.


Doug Stevenson (doug@dougsworld.com)
Tim Davis (tim@polarmet1.mps.ohio-state.edu)