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 |
|---|---|---|---|---|
| -18.91 LUFS | -0.09 dB | -19.03 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 | -19.81 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 11.55 dB | 10.86 dB | -0.69 dB | 1 |
| Female peak-stressed - Annie Coleman Rothenberg | -18.57 LUFS | inside | -1.08 dBFS | inside | -1.01 dBTP | inside | 28.62 dB | 28.62 dB | -0.00 dB | 1 |
| Male neutral - John Greenman | -19.70 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 30.39 dB | 28.52 dB | -1.87 dB | 1 |
| Male soft - Stewart Wills | -19.30 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 43.98 dB | 43.67 dB | -0.31 dB | 1 |
| Male hot - Mark Nelson | -18.17 LUFS | inside | -1.02 dBFS | inside | -1.01 dBTP | inside | 35.08 dB | 35.38 dB | +0.29 dB | 1 |
| Female soft - Kara Shallenberg | -18.59 LUFS | inside | -1.43 dBFS | inside | -1.42 dBTP | inside | 38.46 dB | 37.69 dB | -0.77 dB | 1 |
| Podcast episode sequence | -19.03 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 40.28 dB | 34.75 dB | -5.54 dB | 1 |