Basis: Working playback reference.
Apple leaves mastering loudness to artistic and technical judgment; -16 LUFS is a working Sound Check playback reference, not an Apple delivery target. These checks validate the APU product recipes on deterministic stereo material; they do not certify platform or broadcaster acceptance.
| Project | Status | Result |
|---|---|---|
| Leveler | PASS | Validates complete-program Apple Music Stereo Reference delivery after Learn and lock; isolated renders remain diagnostics. |
| Meter | PASS | Checks the Leveler program delivery and isolated diagnostics with the proposed monitoring view. |
| Optimizer | PASS | Exports Apple Music Stereo Reference delivery candidates from source fixtures. |
| Limiter | PASS | Renders Apple Music Stereo Reference candidates through the loudness and true-peak limiters. |
| Compressor | PASS | Checks complete-program Apple Music Stereo Reference delivery after source-to-target compression; isolated renders remain diagnostics. |
| Status | Time | Condition / Message |
|---|---|---|
| PASS | 12:10:42 | Apple Music Stereo Reference / Pop vocal soft - Chill Winston: source fixture preserves 2 channel(s) |
| PASS | 12:10:42 | Apple Music Stereo Reference / Dynamic piano neutral - Marko Maksimovic: source fixture preserves 2 channel(s) |
| PASS | 12:10:42 | Apple Music Stereo Reference / Instrumental groove hot - Nova Notion: source fixture preserves 2 channel(s) |
| PASS | 12:10:43 | Apple Music Stereo Reference / Pop vocal soft - Chill Winston: fixture is stereo |
| PASS | 12:10:43 | Apple Music Stereo Reference / Pop vocal soft - Chill Winston: fixture contains distinct left and right channels |
| PASS | 12:10:43 | Apple Music Stereo Reference / Dynamic piano neutral - Marko Maksimovic: fixture is stereo |
| PASS | 12:10:43 | Apple Music Stereo Reference / Dynamic piano neutral - Marko Maksimovic: fixture contains distinct left and right channels |
| PASS | 12:10:43 | Apple Music Stereo Reference / Instrumental groove hot - Nova Notion: fixture is stereo |
| PASS | 12:10:43 | Apple Music Stereo Reference / Instrumental groove hot - Nova Notion: fixture contains distinct left and right channels |
| PASS | 12:10:43 | Apple Music Stereo Reference / Apple Music Stereo Reference stereo stress sequence: fixture is stereo |
| PASS | 12:10:43 | Apple Music Stereo Reference / Apple Music Stereo Reference stereo stress sequence: fixture contains distinct left and right channels |
| PASS | 12:10:44 | apple-music-stereo-leveler-learn-program: rendered sample rate is 44100 Hz |
| PASS | 12:10:44 | apple-music-stereo-leveler-learn-program: rendered output preserves 2 channel(s) |
| PASS | 12:10:46 | apple-music-stereo-leveler-apply-lie2me_pop_vocal_soft: rendered sample rate is 44100 Hz |
| PASS | 12:10:46 | apple-music-stereo-leveler-apply-lie2me_pop_vocal_soft: rendered output preserves 2 channel(s) |
| PASS | 12:10:46 | apple-music-stereo-leveler-apply-lullaby_piano_neutral: rendered sample rate is 44100 Hz |
| PASS | 12:10:46 | apple-music-stereo-leveler-apply-lullaby_piano_neutral: rendered output preserves 2 channel(s) |
| PASS | 12:10:46 | apple-music-stereo-leveler-apply-you_make_me_feel_instrumental_hot: rendered sample rate is 44100 Hz |
| PASS | 12:10:46 | apple-music-stereo-leveler-apply-you_make_me_feel_instrumental_hot: rendered output preserves 2 channel(s) |
| PASS | 12:10:46 | apple-music-stereo-leveler-apply-program: rendered sample rate is 44100 Hz |
| PASS | 12:10:46 | apple-music-stereo-leveler-apply-program: rendered output preserves 2 channel(s) |
| PASS | 12:10:46 | Mastering - Apple Music Reference (Stereo): rendered delivery candidates are inside the Apple Music Sound Check working reference Integrated LUFS window |
| PASS | 12:10:46 | Mastering - Apple Music Reference (Stereo): rendered candidates are inside the Apple Music Sound Check working reference sample-peak ceiling |
| PASS | 12:10:46 | Mastering - Apple Music Reference (Stereo): rendered candidates are inside the Apple Music Sound Check working reference true-peak ceiling |
| PASS | 12:10:46 | Mastering - Apple Music Reference (Stereo): rendered candidates produced finite active-speech dynamics diagnostics |
| PASS | 12:10:46 | Mastering - Apple Music Reference (Stereo): rendered candidates preserve 2 channel(s) |
| PASS | 12:10:46 | Mastering - Apple Music Reference (Stereo): rendered candidates preserve distinct channel content |
| PASS | 12:10:46 | Mastering - Apple Music Reference (Stereo): Learn and lock workflow (learn_output=-16.10 LUFS, locked_delta=+0.10 dB) |
| PASS | 12:10:48 | Integrated LUFS validation view / Pop vocal soft - Chill Winston: Meter produced finite source measurements |
| PASS | 12:10:48 | Integrated LUFS validation view / Pop vocal soft - Chill Winston: Meter produced finite output measurements |
| PASS | 12:10:48 | Integrated LUFS validation view / Dynamic piano neutral - Marko Maksimovic: Meter produced finite source measurements |
| PASS | 12:10:48 | Integrated LUFS validation view / Dynamic piano neutral - Marko Maksimovic: Meter produced finite output measurements |
| PASS | 12:10:48 | Integrated LUFS validation view / Instrumental groove hot - Nova Notion: Meter produced finite source measurements |
| PASS | 12:10:48 | Integrated LUFS validation view / Instrumental groove hot - Nova Notion: Meter produced finite output measurements |
| PASS | 12:10:48 | Integrated LUFS validation view / Apple Music Stereo Reference stereo stress sequence: Meter produced finite source measurements |
| PASS | 12:10:48 | Integrated LUFS validation view / Apple Music Stereo Reference stereo stress sequence: Meter produced finite output measurements |
| PASS | 12:10:48 | Sample peak check / Pop vocal soft - Chill Winston: Meter produced finite source measurements |
| PASS | 12:10:48 | Sample peak check / Pop vocal soft - Chill Winston: Meter produced finite output measurements |
| PASS | 12:10:48 | Sample peak check / Dynamic piano neutral - Marko Maksimovic: Meter produced finite source measurements |
| PASS | 12:10:48 | Sample peak check / Dynamic piano neutral - Marko Maksimovic: Meter produced finite output measurements |
| PASS | 12:10:48 | Sample peak check / Instrumental groove hot - Nova Notion: Meter produced finite source measurements |
| PASS | 12:10:48 | Sample peak check / Instrumental groove hot - Nova Notion: Meter produced finite output measurements |
| PASS | 12:10:48 | Sample peak check / Apple Music Stereo Reference stereo stress sequence: Meter produced finite source measurements |
| PASS | 12:10:48 | Sample peak check / Apple Music Stereo Reference stereo stress sequence: Meter produced finite output measurements |
| PASS | 12:10:48 | True peak check / Pop vocal soft - Chill Winston: Meter produced finite source measurements |
| PASS | 12:10:48 | True peak check / Pop vocal soft - Chill Winston: Meter produced finite output measurements |
| PASS | 12:10:48 | True peak check / Dynamic piano neutral - Marko Maksimovic: Meter produced finite source measurements |
| PASS | 12:10:48 | True peak check / Dynamic piano neutral - Marko Maksimovic: Meter produced finite output measurements |
| PASS | 12:10:48 | True peak check / Instrumental groove hot - Nova Notion: Meter produced finite source measurements |
| PASS | 12:10:48 | True peak check / Instrumental groove hot - Nova Notion: Meter produced finite output measurements |
| PASS | 12:10:48 | True peak check / Apple Music Stereo Reference stereo stress sequence: Meter produced finite source measurements |
| PASS | 12:10:48 | True peak check / Apple Music Stereo Reference stereo stress sequence: Meter produced finite output measurements |
| PASS | 12:10:48 | Pop vocal soft - Chill Winston: offline Apple Music Sound Check working reference gate reference (Integrated LUFS=-15.89 LUFS, class=inside, sample_peak=-7.22 dBFS, class=inside, meter_true_peak=-6.82 dBTP, class=inside) |
| PASS | 12:10:48 | Dynamic piano neutral - Marko Maksimovic: offline Apple Music Sound Check working reference gate reference (Integrated LUFS=-16.88 LUFS, class=inside, sample_peak=-2.30 dBFS, class=inside, meter_true_peak=-2.29 dBTP, class=inside) |
| PASS | 12:10:48 | Instrumental groove hot - Nova Notion: offline Apple Music Sound Check working reference gate reference (Integrated LUFS=-15.68 LUFS, class=inside, sample_peak=-3.96 dBFS, class=inside, meter_true_peak=-3.71 dBTP, class=inside) |
| PASS | 12:10:48 | Apple Music Stereo Reference stereo stress sequence: offline Apple Music Sound Check working reference gate reference (Integrated LUFS=-16.07 LUFS, class=inside, sample_peak=-2.30 dBFS, class=inside, meter_true_peak=-2.20 dBTP, class=inside) |
| PASS | 12:10:48 | QC - Apple Music Reference (Stereo): Leveler program delivery candidate is inside the Apple Music Sound Check working reference Integrated LUFS window |
| PASS | 12:10:48 | QC - Apple Music Reference (Stereo): Leveler program delivery candidate is inside the Apple Music Sound Check working reference sample-peak ceiling |
| PASS | 12:10:48 | QC - Apple Music Reference (Stereo): Leveler program delivery candidate is inside the Apple Music Sound Check working reference true-peak ceiling |
| PASS | 12:10:48 | QC - Apple Music Reference (Stereo): Meter sample-peak readings match offline sample peaks |
| PASS | 12:10:48 | QC - Apple Music Reference (Stereo): repeated Meter true-peak readings are stable |
| PASS | 12:10:48 | QC - Apple Music Reference (Stereo): validation candidates preserve 2 channel(s) |
| PASS | 12:10:48 | QC - Apple Music Reference (Stereo): validation candidates preserve distinct channel content |
| PASS | 12:10:48 | QC - Apple Music Reference (Stereo): Meter Integrated LUFS readings match offline file measurements |
| PASS | 12:10:51 | Mastering - Apple Music Reference (Stereo) / Pop vocal soft - Chill Winston: Optimizer export exists |
| PASS | 12:10:51 | apple-music-stereo-optimizer-apply-lie2me_pop_vocal_soft: exported sample rate is 44100 Hz |
| PASS | 12:10:51 | apple-music-stereo-optimizer-apply-lie2me_pop_vocal_soft: exported output preserves 2 channel(s) |
| PASS | 12:10:51 | Mastering - Apple Music Reference (Stereo) / Dynamic piano neutral - Marko Maksimovic: Optimizer export exists |
| PASS | 12:10:51 | apple-music-stereo-optimizer-apply-lullaby_piano_neutral: exported sample rate is 44100 Hz |
| PASS | 12:10:51 | apple-music-stereo-optimizer-apply-lullaby_piano_neutral: exported output preserves 2 channel(s) |
| PASS | 12:10:51 | Mastering - Apple Music Reference (Stereo) / Instrumental groove hot - Nova Notion: Optimizer export exists |
| PASS | 12:10:51 | apple-music-stereo-optimizer-apply-you_make_me_feel_instrumental_hot: exported sample rate is 44100 Hz |
| PASS | 12:10:51 | apple-music-stereo-optimizer-apply-you_make_me_feel_instrumental_hot: exported output preserves 2 channel(s) |
| PASS | 12:10:51 | Mastering - Apple Music Reference (Stereo) / Apple Music Stereo Reference stereo stress sequence: Optimizer export exists |
| PASS | 12:10:51 | apple-music-stereo-optimizer-apply-program: exported sample rate is 44100 Hz |
| PASS | 12:10:51 | apple-music-stereo-optimizer-apply-program: exported output preserves 2 channel(s) |
| PASS | 12:10:51 | Mastering - Apple Music Reference (Stereo): rendered delivery candidates are inside the Apple Music Sound Check working reference Integrated LUFS window |
| PASS | 12:10:51 | Mastering - Apple Music Reference (Stereo): rendered candidates are inside the Apple Music Sound Check working reference sample-peak ceiling |
| PASS | 12:10:51 | Mastering - Apple Music Reference (Stereo): rendered candidates are inside the Apple Music Sound Check working reference true-peak ceiling |
| PASS | 12:10:51 | Mastering - Apple Music Reference (Stereo): rendered candidates produced finite active-speech dynamics diagnostics |
| PASS | 12:10:51 | Mastering - Apple Music Reference (Stereo): rendered candidates preserve 2 channel(s) |
| PASS | 12:10:51 | Mastering - Apple Music Reference (Stereo): rendered candidates preserve distinct channel content |
| PASS | 12:10:52 | apple-music-stereo-limiter-learn-program: rendered sample rate is 44100 Hz |
| PASS | 12:10:52 | apple-music-stereo-limiter-learn-program: rendered output preserves 2 channel(s) |
| PASS | 12:10:54 | apple-music-stereo-limiter-apply-lie2me_pop_vocal_soft: rendered sample rate is 44100 Hz |
| PASS | 12:10:54 | apple-music-stereo-limiter-apply-lie2me_pop_vocal_soft: rendered output preserves 2 channel(s) |
| PASS | 12:10:54 | apple-music-stereo-limiter-apply-lullaby_piano_neutral: rendered sample rate is 44100 Hz |
| PASS | 12:10:54 | apple-music-stereo-limiter-apply-lullaby_piano_neutral: rendered output preserves 2 channel(s) |
| PASS | 12:10:54 | apple-music-stereo-limiter-apply-you_make_me_feel_instrumental_hot: rendered sample rate is 44100 Hz |
| PASS | 12:10:54 | apple-music-stereo-limiter-apply-you_make_me_feel_instrumental_hot: rendered output preserves 2 channel(s) |
| PASS | 12:10:54 | apple-music-stereo-limiter-apply-program: rendered sample rate is 44100 Hz |
| PASS | 12:10:54 | apple-music-stereo-limiter-apply-program: rendered output preserves 2 channel(s) |
| PASS | 12:10:55 | Mastering - Apple Music Reference Ceiling (Stereo): rendered candidates do not exceed the Apple Music Sound Check working reference Integrated LUFS ceiling |
| PASS | 12:10:55 | Mastering - Apple Music Reference Ceiling (Stereo): rendered candidates are inside the Apple Music Sound Check working reference sample-peak ceiling |
| PASS | 12:10:55 | Mastering - Apple Music Reference Ceiling (Stereo): rendered candidates are inside the Apple Music Sound Check working reference true-peak ceiling |
| PASS | 12:10:55 | Mastering - Apple Music Reference Ceiling (Stereo): locked compensation places the complete program inside the Apple Music Sound Check working reference target range within scenario tolerance (actual=-16.10 LUFS, range=-17.00..-15.00 LUFS, lower tolerance=1.00 dB) |
| PASS | 12:10:55 | Mastering - Apple Music Reference Ceiling (Stereo): rendered candidates produced finite active-speech dynamics diagnostics |
| PASS | 12:10:55 | Mastering - Apple Music Reference Ceiling (Stereo): rendered candidates preserve 2 channel(s) |
| PASS | 12:10:55 | Mastering - Apple Music Reference Ceiling (Stereo): rendered candidates preserve distinct channel content |
| PASS | 12:10:56 | apple-music-stereo-compressor-learn-program: rendered sample rate is 44100 Hz |
| PASS | 12:10:56 | apple-music-stereo-compressor-learn-program: rendered output preserves 2 channel(s) |
| PASS | 12:10:58 | apple-music-stereo-compressor-apply-lie2me_pop_vocal_soft: rendered sample rate is 44100 Hz |
| PASS | 12:10:58 | apple-music-stereo-compressor-apply-lie2me_pop_vocal_soft: rendered output preserves 2 channel(s) |
| PASS | 12:10:58 | apple-music-stereo-compressor-apply-lullaby_piano_neutral: rendered sample rate is 44100 Hz |
| PASS | 12:10:58 | apple-music-stereo-compressor-apply-lullaby_piano_neutral: rendered output preserves 2 channel(s) |
| PASS | 12:10:58 | apple-music-stereo-compressor-apply-you_make_me_feel_instrumental_hot: rendered sample rate is 44100 Hz |
| PASS | 12:10:58 | apple-music-stereo-compressor-apply-you_make_me_feel_instrumental_hot: rendered output preserves 2 channel(s) |
| PASS | 12:10:58 | apple-music-stereo-compressor-apply-program: rendered sample rate is 44100 Hz |
| PASS | 12:10:58 | apple-music-stereo-compressor-apply-program: rendered output preserves 2 channel(s) |
| PASS | 12:10:58 | Mastering - Apple Music Reference (Stereo): rendered delivery candidates are inside the Apple Music Sound Check working reference Integrated LUFS window |
| PASS | 12:10:58 | Mastering - Apple Music Reference (Stereo): rendered candidates are inside the Apple Music Sound Check working reference sample-peak ceiling |
| PASS | 12:10:58 | Mastering - Apple Music Reference (Stereo): rendered candidates are inside the Apple Music Sound Check working reference true-peak ceiling |
| PASS | 12:10:58 | Mastering - Apple Music Reference (Stereo): rendered candidates produced finite active-speech dynamics diagnostics |
| PASS | 12:10:58 | Mastering - Apple Music Reference (Stereo): rendered candidates preserve 2 channel(s) |
| PASS | 12:10:58 | Mastering - Apple Music Reference (Stereo): rendered candidates preserve distinct channel content |