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Title
IS24 Characterisation of large amounts of wav audio
Detailed description SB holds large amounts of WAV audio (200Tb +) in different resolutions (ranging from 22Khz 16 bit to 96Khz 24 bit). Different resolutions have been choosen over the years for different reasons (equipment, budgets for storage space, quality of original media in digitisation). Before we ingest all these older collections into our new DOMS we need to do simple characterisation on the files to ensure to generate correct technical metadata (in PREMIS format) for the files. We know that cirtain collections that claim to hold only eg. 48Khz 16 bit files have files in other resolutions - most likely as a result of mis-operation of the digitisation equipment.
Scalability Challenge
Large amounts of data (200Tbytes +). For simple characterisation not much CPU is required but a lot of I/O is needed.
Some of the files are rather large (8Gbytes) - could be a problem for some characterisation tools (not problematic for tools that only reads header information and magic bytes)
Issue champion Bjarne Andersen (SB)
Other interested parties
 
Possible Solution approaches Should be simple.
1. Find appropriate characterisation tool that supports wav in a suitable manner
    * XC*L framework seems to have good wav support - evaluate and test.
2. Ensure this tools runs within the SCAPE platform
Context
Lessons Learned
Training Needs
Datasets [WAV with Danish Radio broadcasts, ripped audio CD’s, and SB in-house audio digitization]
Solutions [SO06 Use Ffprobe to characterise Wav]
SO25 Rosetta v3.0 Implementation Integrated with DROID 6

Evaluation

Objectives This is about scaleability and functionality
Success criteria We will have a workflow that can process WAV (and BWF) files - also larger files up to 10Gb
Automatic measures 1. Support for both WAV and BWF
2. Support for larger files - up to 10Gb
3. Process 2Tbytes of sample content in less than 24 hours
4. 100% of the files are identified correctly
5. 100% of the files gets useful and correct characterisation output
Manual assessment 1. Sample checking of the generated characterisation output
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