Performance Testing for ADCs: �New FADGI Guidelines & �ADCTest Software

Kate Murray, Library of Congress/FADGI

kmur@loc.gov | @fileformatology

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Rebecca Chandler, AVP

rebecca@weareavp.com | @rebschandler

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http://www.digitizationguidelines.gov/

2011-2013: Interstitial errors

2012: First versions of ADC Specifications & Testing

2016: High Level Guidelines

2017: Low Cost Guidelines

2018: ADCTest

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quality

test method

instructions on how to perform tests

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performance metrics�set of pass-fail specifications for the results produced when utilizing the test method

http://www.digitizationguidelines.gov/guidelines/digitize-audioperf.html

high quality

low cost

All ADCs

All performance metrics

High quality test equipment �Requires: $$$$$ equipment + mad engineering skills

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Limited ADCs

Modified performance metrics

Minimal acceptable results

Requires: $ equipment + modest engineering skills

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real time/typical DAC and ADC are both connected to the audio interfaces on the computer running ADCTest

offline vendor captures response files that have been passed through their ADC; ADCTest used by client to confirm compliance to FADGI low cost guidelines

FADGI (Federal Agencies Digital Guidelines Initiative): http://www.digitizationguidelines.gov/

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Audio Performance Guidelines: http://www.digitizationguidelines.gov/guidelines/digitize-audioperf.html

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ADCTest on GitHub: https://github.com/LibraryOfCongress/ADCTest

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