Alignment Level
Alignment level is an 'anchor' point, 9 db below the nominal level, a reference level which exists throughout the system or broadcast chain, though it may have different actual voltage levels at different points in the analog chain. Typically, nominal (not alignment) level is 0 dB, corresponding to an analog sine wave voltage of RMS voltage of 1.23 volts (+4 dBu or 3.47 volts peak to peak). In the digital realm, alignment level is −18 dBFS.
- AL = analog level
- SPL = sound pressure level
Read more about this topic: Headroom (audio Signal Processing)
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