Talk:Headroom

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[edit] Conflict with Loudness War article

This article states:

"The EBU specifies a PML of 9 dB below 0 dBFS (-9 dBFS), thus giving 9 dB of headroom."

but the Loudness War article states:

"...the European Broadcast Union standards call for 18dB of headroom."

Straussian 14:54, 9 September 2007 (UTC)

I dispute the statement made in the Loudness War article. I refer the reader to AES Convention Paper 5538 On Levelling and Loudness Problems at Broadcast Studios which is given as a link at the bottom of this article. Row 6 of Table 2 at the bottom of page 17 of the paper (EBU PPM digital (QPPM)) clearly states that for digital audio, PML is -9 dBFS and the alignment level is -18 dBFS. The author of the Loudness War article is confusing the concept of "headroom" with that of "alignment level".

Chris319 06:46, 12 September 2007 (UTC)