This automated scenario validates a -19 LUFS mono playback-equivalent working target, not a universal platform acceptance rule. Apple currently recommends audio around -16 LKFS (+/-1) and true peak no higher than -1 dBFS without publishing a separate mono target. AES TD1008 documents the 3 LU change that can occur when mono is duplicated to two channels and recommends correct channel metadata or player compensation. The separate stereo scenario validates genuine two-channel processing against Apple's published recommendation.
| Profile | Channels | Integrated Loudness | True Peak Ceiling | Coverage | Basis |
|---|---|---|---|---|---|
| Apple Podcasts recommendation | Stereo | -16 LUFS | -1 dBTP | Not tested in this run | Around -16 LKFS (+/-1) and true peak no higher than -1 dBFS |
| Mono playback-equivalent convention | Mono | -19 LUFS | -1 dBTP | Tested in this run | Working target for raw mono files expected to be duplicated to stereo playback |
| Learn-pass Integrated LUFS | Locked Delta | Program Integrated LUFS | Program Sample Peak | Program True Peak |
|---|---|---|---|---|
| -18.36 LUFS | -0.64 dB | -18.96 LUFS | -1.01 dBFS | -1.01 dBTP |
| Rendered Clip | Integrated Loudness | LUFS Class | Sample Peak | Sample Peak Class | True Peak | True Peak Class | Source Active-speech RMS Range | Output Active-speech RMS Range | Active-speech RMS Range Change | Channels |
|---|---|---|---|---|---|---|---|---|---|---|
| Female very soft - Karen Savage | -20.74 LUFS | below | -1.01 dBFS | inside | -1.01 dBTP | inside | 11.55 dB | 79.02 dB | +67.47 dB | 1 |
| Female peak-stressed - Annie Coleman Rothenberg | -18.12 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 28.62 dB | 29.42 dB | +0.80 dB | 1 |
| Male neutral - John Greenman | -19.23 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 30.39 dB | 27.27 dB | -3.12 dB | 1 |
| Male soft - Stewart Wills | -19.75 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 43.98 dB | 45.44 dB | +1.46 dB | 1 |
| Male hot - Mark Nelson | -18.16 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 35.08 dB | 35.22 dB | +0.14 dB | 1 |
| Female soft - Kara Shallenberg | -19.04 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 38.46 dB | 37.66 dB | -0.79 dB | 1 |
| Podcast episode sequence | -18.96 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 40.28 dB | 42.04 dB | +1.76 dB | 1 |