AudioMD: Digital Audio Archival Object Technical Metadata Element. AudioMD contains technical metadata that describe a digital audio archival object. AudioMD: Elements of a digital audio archival object. The AudioMD elements describe the characteristics of a digital audio archival object. AudioMD contains 6 top level elements: 1. bits_per_sample The number of bits in a digital audio sample i.e. quantization e.g. 16, 24; 2. channel Number and information about channels/tracks (e.g., 2-trk, 4-trk, 8-trk, etc.); 3. data_rate Information about the mode and data rate of audio files in Kb/s e.g. 16, 44.1, 96 etc; 4. duration Duration of audio source material in time i.e. HH:MM:SSSS format; 5. sampling_frequency The rate at which the audio was sampled e.g. 44.1KHz, 96KHz, etc...; 6. sound_field Aural space on source recording, e.g., monaural, stereo, surround sound, etc.... AudioMDType: Complex Type for encapsulating within a single parent element the individual digital audio archival object elements that describe an object or portion of an object. But note that the individual digital audio archival object elements that comprise the AudioMD schema can be used independently of the schema element and directly under a METS mdSec.dmWrap element. The individual elements that comprise a digital audio archival object element are documented under their corresponding types. AudioMDType has a single attribute, ID (XML ID). bits_per_sampleType: Complex Type for recording sample size of an item or portion of an item. bits_per_sampleType has a single attribute, ID (XML ID). channelType: Complex Type for recording the channel configuration used in an item or portion of an item. channelType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of channel metadata contained in the element. - channelTrackQuantity: the number of channels of audio e.g. 1, 2, 4, 5 - channelTrackFormat: information about the track format e.g. 1/4- trk, 1/2- trk, full-trk, etc... - channelTrackInformation: information about the channel and track configuration data-_rateType: Complex Type for recording the data rate (e.g. 1.5 Mbps, 4Mbps, etc...) of an item or portion of an item. data_rateType has 2 attributes, ID: (XML ID) MODE: mode of data rate i.e. Fixed or Variable. durationType: Complex Type for recording the duration of an item or portion of an item. durationType has a single attribute, ID (XML ID). sampling_frequencyType: Complex Type for recording the sampling frequency of an item or portion of an item in pixels. sampling_frequencyType has a 1 attribute, ID: (XML ID) sound_fieldType: Complex Type for recording the aural space of the item or portion of an item. sound_fieldType has a single attribute, ID (XML ID).