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» Ristretto Press release:

Batch Totem | Trunkeret & Ikonisk [rist07]
'Trunkeret & Ikonisk' consists of 19 audiotracks on a standard 1'44 mb Floppydisk.
The audio is encoded in the GSM 6.10 WAV format at various bitrates. The disk holds 74 minutes of audio, that can be played on a computer with standard audio-players like Winamp, Windows Media Player and Itunes without any external codec installed.

The audio has not been converted from existing material, but composed directly in the spectral domain, using the GSM format as a chosen timbral limitation. The aim has not been to fit as much data as possible on a lowlevel medium as the floppydisk, but rather to explore the musical possibillities inherent in the specific medium and audioformat. On certain tracks the amplitude and low bitrates produce 'ghost' frequencies according to the Nyquist theorem, and the algorithm of the audio codec, meaning that very high frequencies and white noise can occur at very low bitrates. Using listening equipment with a subwoofer is recommended.

»  Disk Information.rtf
»  Tracklist.rtf
»  Sample track 1
»  Sample track 2
» Sample track 3

» GSM WAV

The GSM WAVE format is generally used as a speech compression codec in mobile phones / speech applications.
The codec is embedded in Micrsosoft Windows by default.
On this release the codec compresses datasize (depending on sampling frequency) down to the lowest possible filesize that a given filesystem can handle. On a NTFS filesystem this can be as low as 4 KB per minute of audio in WAVE format ( Sample track 3 is exactly 4 KB in size and holds one minute of audio. Samplerate: 320HZ.)
On a Windows machine the lowest possible file / clustersize can be determined by opening Notepad.exe
and save an empty document.
The displayed filesize can vary, but generally the actual size is displayed by right clicking the file and selecting 'properties'