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. Stereo remains untested until the analysis adds stereo fixtures, stereo render capture, and stereo offline measurement.
| 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 |
|---|---|---|---|---|
| -19.43 LUFS | +0.43 dB | -19.43 LUFS | -1.01 dBFS | -1.01 dBTP |
| Rendered Clip | Integrated Loudness | LUFS Class | Sample Peak | Sample Peak Class | True Peak | True Peak Class | Source Speech RMS Range | Output Speech RMS Range | Speech RMS Range Change |
|---|---|---|---|---|---|---|---|---|---|
| Female very soft - Karen Savage | -20.43 LUFS | inside | -1.02 dBFS | inside | -1.01 dBTP | inside | 11.55 dB | 11.09 dB | -0.46 dB |
| Female peak-stressed - Annie Coleman Rothenberg | -18.57 LUFS | inside | -1.08 dBFS | inside | -1.01 dBTP | inside | 28.62 dB | 29.00 dB | +0.38 dB |
| Male neutral - John Greenman | -19.38 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 30.39 dB | 28.48 dB | -1.91 dB |
| Male soft - Stewart Wills | -18.73 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 43.98 dB | 43.71 dB | -0.27 dB |
| Male hot - Mark Nelson | -18.26 LUFS | inside | -1.03 dBFS | inside | -1.01 dBTP | inside | 35.08 dB | 35.35 dB | +0.27 dB |
| Female soft - Kara Shallenberg | -18.85 LUFS | inside | -1.62 dBFS | inside | -1.61 dBTP | inside | 38.46 dB | 37.92 dB | -0.53 dB |
| Podcast episode sequence | -19.43 LUFS | inside | -1.01 dBFS | inside | -1.01 dBTP | inside | 40.28 dB | 40.61 dB | +0.33 dB |