Here are the major recording curves used for producing records before 1964:
| Code | NAME | SHELF UPPER-FREQ Hz | SHELF BOOST dB |
BASS TURNOVER Hz | TREBLE ROLL-OFF dB | OTHER |
|---|---|---|---|---|---|---|
| 800N-16 | Acoustic | none | N - none | 800 | -16 | Use variable hi-cut filter |
| 800N-12 | Acoustic | none | N - none | 800 | -12 | Use variable hi-cut filter |
| 630N-16 | Acoustic | none | N - none | 630 | -16 | Use variable hi-cut filter |
| 630N-12 | Acoustic | none | N - none | 630 | -12 | Use variable hi-cut filter |
| 200N-10 | Acoustic | none | N - none | 200 | -10 | Use variable hi-cut filter |
| 400N-12 | AES | none | N - none | 400 | -12 | Audio Engineering Society |
| 250N-6 | American 78 | none | N - none | 250 | -6 | - |
| 250N-8 | American 78 | none | N - none | 250 | -8 | - |
| 500N-8 | Audiophile | none | N - none | 500 | -8 | - |
| 630N-16 | Bartok | none | N - none | 630 | -16 | - |
| 400N-12.7 | Capitol | none | N - none | 400 | -12.7 | - |
| 350N-10 | CCIR 78 | none | N - none | 350 | -10 | - |
| 300N-16 | Columbia 78 | none | N - none | 300 | -16 | - |
| 500C-16 | Columbia LP | 100 | C +14 | 500 | -16 | Also called LP |
| 500N-15 | Cook | none | N - none | 500 | -15 | Rolloff varies from -12 to -15 dB |
| 250N-D | Decca 78 | none | N - none | 250 | -D (-6 @ 3dB/octave) | Also ffrr 78 |
| 200N-0 | Early 78 | none | N - none | 200 | -0 | Use variable hi-cut filter |
| 250N-0 | European 78 | none | N - none | 250 | -0 | Use variable hi-cut filter |
| 250N-D | ffrr 78 | none | N - none | 250 | -D (-6 @ 3dB/octave) | Also called Decca 78 |
| 500C-10.5 | ffrr LP | 100 | C +14 | 500 | -10.5 | Also called London |
| 500R-16 | HMV LP | 50 | R +20 | 500 | -16 | EMI |
| 500R-13.7 | IEC | 50 | R +20 | 500 | -13.7 | Infrasonic 15 Hz, Ultrasonic 22 KHz |
| Code | NAME | SHELF UPPER-FREQ Hz | SHELF BOOST dB |
BASS TURNOVER Hz | TREBLE ROLL-OFF dB | OTHER |
| 800N-16 | Kapp | none | N - none | 800 | -16 | - |
| 500C-10.5 | London | 100 | C +14 | 500 | -10.5 | ffrr LP |
| 500C-16 | LP | 100 | C +14 | 500 | -16 | - |
| 500N-12 | MGM | none | N - none | 500 | -12 | - |
| 500C-6 | Modern 78 | 100 | C +14 | 500 | -6 | - |
| 500C-8 | Modern 78 | 100 | C +14 | 500 | -8 | - |
| 500B-16 | NAB, NARTB | 62.5 | B +18 | 500 | -16 | National Association of Broadcasters |
| 500R-13.7 | New Orthophonic | 50 | R +20 | 500 | -13.7 | RCA also RIAA |
| 500N-12.7 | Old Orthophonic | none | N - none | 500 | -12.7 | RCA |
| 800N-8 | Old RCA | none | N - none | 800 | -8 | - |
| 500C-12 | Pacific Jazz | 100 | C +14 | 500 | -12 | - |
| 400N-6 | Philips | none | N - none | 400 | -6 | - |
| 250N-10 | Poor 78 | none | N - none | 250 | -10 | Use variable hi-cut filter |
| 500R-13.7 | RIAA | 50 | R +20 | 500 | -13.7 | Recording Industry Assoc of America |
| 500R-13.7 | RCA New Orthophonic | 50 | R +20 | 500 | -13.7 | RCA also RIAA |
| 500N-12.7 | RCA Old Orthophonic 33 | none | N - none | 500 | -12.7 | RCA |
| 800N-8 | RCA, Old | none | N - none | 800 | -8 | RCA made several changes |
| 800N-12.7 | RCA | none | N - none | 800 | -12.7 | Release delays confused RCA curves |
| 800N-12 | Technichord | none | N - none | 800 | -12 | - |
| 400N-0 | Telefunken 78 | none | N - none | 400 | -0 | Use variable hi-cut filter |
| 350N-0 | Universal 78 | none | N - none | 350 | -0 | Use variable hi-cut filter |
| 350C-8 | Worn 78 | 80 | C +14 | 350 | -8 | Use variable hi-cut filter |