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qa_engine
  • Verify sound quality using all methods
    • Vinyl Emulation - slow track down to 75% or so and listen for crackles on sharp transients
    • Pitch-Independent Time Stretch

Engine QA Checklist

This page is a checklist for ensuring that the Sound Engine is working as intended.

Reference Test Grid

Behaviour to Test VE PITS
Pitch Shift a Track down by 90% [1] ? ?
Pitch Shift a Track up by 90% [1] ? ?
Pitch bend a track down to the minimum with 90% pitch range [1] ? ?
Pitch bend a track up to the maximum with 90% pitch range [1] ? ?
Pitch shift a track up and down with 90% pitch range [1] ? ?
Mix a track at 121 BPM on deck 1 with a track at 120 BPM on deck 2 by shifting the pitch on deck 2 by 0.8% [2] ? ?
Mix a track at 146 BPM on deck 1 with a track at 145 BPM on deck 2 by shifting the pitch on deck 2 by 0.7% [2] ? ?

[1] Listen for crackles, sharp transients or harmonic distortion [2] Beat should be in sync for a decent amount of time but not perfect.

Mixxx 1.8.0 Test Grid

  • Test With:
    • Mixxx 1.8.0, Git rXXXX
    • Qt X.Y.Z (whatever is shipped on OSX and Windows with Mixxx)
Translations of this page:
qa_engine.txt · Last modified: 2013/06/12 14:01 by rryan