Draft Technical Metadata for Digitized Audio version 0.1 10/22/2003 compiled by Michael Olson from the Library of Congress Audio-Visual Prototyping Project AMD.xsd Number Name Element Name Attributes Field Values Description TA-1 Audio Type analog_digi_flag Indicator of "Analog", "PhysDigital", "FileDigital" how this entity will be describe TA-2 File size audio_block_size Describes Numberic Data. File size in bytes. the size of the audio file in bytes TA-3 Encoding scheme audio_data_encoding Describes encoding scheme of the audio d "PCM" pulse code modulation and Sony "DSD" TA-4 Bit Sample bits_per_sample "16", "24" etc.. Number of bits per audio sample. TA-5 Bit Order byte_order Describes the bit order in a byte TA-6 Checksum TA-6.1 checksum_datetime Date and time the checksum calculation is TA-6.2 checksum_type Type of checksum TA-6.3 checksum_value Describes the value of the checksum TA-7 Compression TA-7.1 codec_creator_app "Soundforge" etc. Software program used to encode the aud TA-7.2 codec_creator_app_version Numeric Data Version of encoding software program. TA-7.3 codec_name The name and version of the compression TA-7.4 codec_quality "lossy" or "lossless" Indicator if the codec is lossy or lossless. TA-8 Data Rate TA-8.1 data_rate Data eg., "64", "128", "256", etc. rate of the audio in an MP3 or other c TA-8.2 data_rate_mode "fixed" or "variable" Field for specifying whether data rate mod TA-9 Sampling TA-9.1 sampling_frequency "16", 24", etc. Field for specifying the sampling rate of the TA-9.2 first_sample_offset Numeric Data Location of the first valid sound byte in the TA-9.3 first_valid_byte_block Numeric Data Location of the first valid sound byte in the TA-9.4 last_valid_byte_block Numeric Data Location of the last valid sound byte in the TA-9.5 num_sample_frames Numeric Data The number of frames within an audio file. TA-10 Format TA-10.1 format_name Name of the Digital Audio format. TA-10.2 format_note Free text note field for describing the forma TA-10.3 format_version The format version of the Digital Audio file. TA-11 Use TA-11.1 file_role "PM", DM", "UC" Role fo the digitized audio file, eg., preserv TA-11.2 security free text Description of any security devices associa TA-12 Source physical characteristics TA-12.1 phys_format Name of the audio source physical format. TA-12.2 condition Free text discription of the physical conditio TA-12.3 dimensions Dimensions width depth, diameter, gauge, height, length, note, thickness, units, of audio source material TA-12.4 disposition What became of the audio source item. W TA-12.5 generation Generation of the audio source item that w TA-13 Source Physical Condition TA-13.1 base_material Base material of the source sound recordin TA-13.2 binder Type polyvinyl chloride. "CA" Cellulose Acetate, "PVC"of adhesive used to bind recording su TA-13.3 disc_surface Information on the type of disc surface. Eg TA-13.4 oxide The type of oxide used for the coating of a TA-13.5 reflective layer The type of substrate on an optical disk. TA-13.6 stock_brand The audio source stock type. TA-14 Source audio characteristics TA-14.1 groove Groove type of audio source. TA-14.2 track_format Track format "full track", "half track", "quarter track" of magnetic tape. TA-14.3 tracking_type Type of tracking code. In this case the trac TA-14.4 tracking_value Media Id number. TA-14.5 noise_reduction "DA", "DB", "FL", etc. Noise reduction system used in the source TA-14.6 equalization Equalization system inherent in the source "FFRR" Full Frequency Range Recording, "RIAA" Recording Indus TA-15 Source speed TA-15.1 speed "1 7/8 ips", "78 rpm" etc.Nominal speed of the source recording inc TA-15.2 speed_adjustment Speed actually used at playback expresse TA-15.3 speed_note Note to state actual speed as a number or TA-16 Digital File Info TA-16.1 duration Time duration of digital audio file. TA-16.2 note Free text field for recording any alterations TA-16.3 num_channels "1", "2" etc. Number of audio chanels TA-16.4 sound_channel_map Information about the "1=left-front", "2=right-front", "3=center", etc. channedl configurati TA-16.5 sound_field "mono", "stereo", etc. Aural space of the digital audio file. Delim TA-17 Calibration TA-17.1 calibration_ext_int Indicator that the calibration information is "ext" external, "int" internal TA-17.2 calibration_location URL Temporary location of the calibration file if TA-17.3 calibration_time_stamp Location of calibration tones within a file TA-17.4 calibration_track_type The type of tracking code on audio source ow this entity will be described in the METS document. Is the described file analog, PhysDigital, or FileDigital size of the audio file in bytes coding scheme of the audio data s per audio sample. bit order in a byte e the checksum calculation is applied to the digital audio file. value of the checksum gram used to encode the audio file. coding software program. d version of the compression algorithm used. e codec is lossy or lossless. he audio in an MP3 or other compressed file. Expressed in kbps ifying whether data rate mode is fixed or variable. ifying the sampling rate of the digital audio file. Expressed in Khz. e first valid sound byte in the block. e first valid sound byte in the block. e last valid sound byte in the block. of frames within an audio file. Digital Audio format. field for describing the format. rsion of the Digital Audio file. gitized audio file, eg., preservation master, duplicate master, access copy. any security devices associated with the digital audio file audio source physical format. ription of the physical condition of the item. Eg. Sticky shed tape, chipped disc, etc.. f audio source material e of the audio source item. Was it reshelved, discarded, loaned, or destroyed. the audio source item that was digitized, eg., studio master, original disc, preservation tape copy, etc. of the source sound recording, eg. Plastic, glass, vinyl, metal, wax polycarbonate, etc. sive used to bind recording surface to base material. n the type of disc surface. Eg. Aluminum, acetate etc. xide used for the coating of a tape recording, eg. Cobalt modified, chromium dioxide, etc. ubstrate on an optical disk. urce stock type. of audio source. of magnetic tape. ng code. In this case the tracking code will be a Media ID. on system used in the source audio recording. ystem inherent in the source recording. d of the source recording including unit of measure. y used at playback expressed as a percentage of the nominal speed. actual speed as a number or to state a deviation or speed correction. of digital audio file. for recording any alterations made to the digital audio file bout the channedl configuration. f the digital audio file. Delimited to stereo or mono. the calibration information is contaiuned within the file or externally. cation of the calibration file if it is external. alibration tones within a file acking code on audio source such as a barcode or media ID number. Required Status for Technical Audio Metadata compiled by Michael Olson Number Name Required Status Repeatable? TA-1 Audio Type M No TA-2 File size M No TA-3 Encoding scheme M No TA-4 Bit Sample M No TA-5 Bit Order MA No TA-6.1 Checksum Date O No TA-6.2 Checksum Type O No TA-6.3 Checksum Value O No TA-7.1 Codec Creator App R No TA-7.2 Codec Creator App Version R No TA-7.3 Codec Name R No TA-7.4 Codec Quality R No TA-8.1 Data Rate R No TA-9.1 Sampling Frequency M No TA-9.2 First Sample Offset O No TA-9.3 First Valid Byte Block O No TA-9.4 Last Valid Byte Block O No TA-9.5 Num Sample Frames O No TA-10.1 Format Name M No TA-10.2 Format Note O No TA-10.3 Format Version MA No TA-11.1 File Role M No TA-11.2 Security O No TA-12.1 Phys Format M No TA-12.2 Condition R Yes TA-12.3 Dimensions R O Yes TA-12.4 Disposition O No TA-12.5 Generation R No TA-13.1 Base material R No TA-13.2 Binder R No TA-13.3 Disc surface R No TA-13.4 Oxide R No TA-13.5 Reflective layer R No TA-13.6 Stock brand R No TA-14.1 Groove No TA-14.2 Track format MA No TA-14.3 tracking_type M No TA-14.4 tracking_value M No TA-14.5 noise_reduction MA No TA-14.6 equalization R No TA-15.1 speed MA Yes TA-15.2 speed_adjustment MA Yes TA-15.3 speed_note O Yes TA-16.1 duration M No TA-16.2 note O Yes TA-16.3 num_channels M No TA-16.4 sound_channel_map M No TA-16.5 Sound Field M Yes TA-17.1 Calibration Ext Int O No TA-17.2 Lalibration Location O No TA-17.3 Calibration Time Stamp O No TA-17.4 Calibration Track Type O No version 0.1 (10/27/03) Notes Checksum provided at Repository Ingestion Checksum provided at Repository Ingestion Checksum provided at Repository Ingestion Applies to MP3 access copies only. 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