ChrisLacinak - AVP...Status. Teaming.with.Indiana.University.on.a.grant.proposal.in....

Chris Lacinak [email protected] | www.avpreserve.com

IASA 2010, Philadelphia November 5th, 2010

Addressing this issue and the general lack of proper testing for digital audio systems

  FADGI Audio Performance Testing Project

  Suite of 3 test and measurement projects   #1 – Combination of AES-‐17 Test Method and and IASA

TC-‐04 Performance Specifications   #2 – Interstitial Errors   #3 – Measuring Clock stability over time

Chris Lacinak | www.avpreserve.com | IASA 2010, Philadelphia | November 5th, 2010

The Problem


Past Approaches to Prevention   Reductionist

  Disable x, y & z   Optimize a, b & c   Do g before f   Etc….

  Requires constant updating with:   Each piece of software   Each software upgrade   Different Operating Systems (OS)   OS upgrades


Past Approaches to Analysis Real-‐Time Analysis

Sound Card

Digital Stream

Hard Disk

Sound Card

D/A

Analyze &

Report

Errors Occur


Past Approaches to Analysis Non-‐Real Time

Sound Card

Digital Stream

Hard Disk

Sound Card

D/A

Analyze &

Report

Errors Occur


Past Approaches to Analysis   Amplitude variation over time algorithm inaccurate

  Major over and under reporting

  Requires intensive manual review


Past Approaches to System Integrity Testing

  Not representative of the nature of the problem


A Proposed Solution   Constant monitoring

  Comparative Analysis

  Commonly used Null Test


Examples


Status   Teaming with Indiana University on a grant proposal in

support of further research and development of a tool   Hardware   Alignment   Temporal Errors   Amplitude Errors   Supporting materials (tutorials, thresholds)

  Goal of off-‐the-‐shelf, low-‐cost, open solution

  Submitting as requests for official standards projects to AES SC on Test and Measurement


ChrisLacinak - AVP...Status. Teaming.with.Indiana.University.on.a.grant.proposal.in....

Documents

Transcript of ChrisLacinak - AVP...Status. Teaming.with.Indiana.University.on.a.grant.proposal.in....