레벨에 관한 국제 표준. EBU , SMPTE 등

• 아날로그 레퍼런스 레벨 : +4dBu, -10dBV
• 디지털 레퍼런스 레벨 : -18dBFS , -20dBFS
• 16-bit 디지털 레퍼런스 레벨 : -12dBFS, 컨슈머 장비에서 주로 사용됨¹⁾

• EBU R68 is used in most European countries, specifying +18 dBu at 0 dBFS
• In Europe, the EBU recommend that -18 dBFS equates to the Alignment Level
• European & UK calibration for Post & Film is −18 dBFS = 0 VU
• UK broadcasters, Alignment Level is taken as 0 dBu (PPM4 or −4VU)
• US installations use +24 dBu for 0 dBFS
• American and Australian Post: −20 dBFS = 0 VU = +4 dBu
• The American SMPTE standard defines −20 dBFS as the Alignment Level
• In Japan, France and some other countries, converters may be calibrated for +22 dBu at 0 dBFS.
• BBC spec: −18 dBFS = PPM “4” = 0 dBu
• German ARD & studio PPM +6 dBu = −10 (−9) dBFS. +16 (+15)dBu = 0 dBFS. No VU.
• Belgium VRT: 0 dB (VRT Ref.) = +6dBu ; -9dBFS = 0 dB (VRT Ref.) ; 0dBFS = +15dBu.

레퍼런스 레벨과 호환이 되는 장비.