Speaker Characteristics:

Gender: [male|female];
Age range: [youth|adult|senior];
Pronunciation dialect: [Your best guess|Librivox].

Recording Information:

Microphone make: [Librivox];
Microphone type: [Librivox];
Audio card make: [Librivox];
Audio card type: [Librivox]
Audio Recording Software: [Librivox];
O/S: [Librivox].

File Info: 

File type: [wav];
Sampling rate: [16kHz|32kHz|44.1kHz|48kHz];
Sample rate format: [8bit|16bit|32bitfloat];
Number of channels: [1];
Audio Processing: [y/n/unk] (we prefer, but *do not require*, unprocessed audio)
If yes, please describe: [noise filtering|equalization|audio level normalization|...]