| Title | Year | Status | Character |
|---|
| The Boost | 1988 | re-recording mixer - as Charles 'Bud' Grenzbach | |
| Halloween 4: The Return of Michael Myers | 1988 | sound recording mixer - as Charles 'Bud' Grenzbach | |
| Journey to the Center of the Earth | 1988 | re-recording mixer - as Charles 'Bud' Grenzbach | |
| Lady in White | 1988 | re-recording mixer - as Charles 'Bud' Grenzbach | |
| Alien from L.A. | 1988 | re-recording mixer - as Charles 'Bud' Grenzbach | |
| The In Crowd | 1988 | re-recording mixer - as Charles W. Grenzbach | |
| The Little Match Girl | 1987 | TV Movie re-recording mixer - as Bud Grenzbach | |
| Wall Street | 1987 | re-recording mixer - as Charles 'Bud' Grenzbach | |
| No Way Out | 1987 | re-recording mixer - as Charles 'Bud' Grenzbach | |
| Malone | 1987 | re-recording mixer | |
| Blood Vows: The Story of a Mafia Wife | 1987 | TV Movie re-recording mixer - as Bud Grenzbach | |
| Platoon | 1986 | re-recording mixer - as Charles 'Bud' Grenzbach | |
| Body Slam | 1986 | re-recording mixer - as Charles 'Bud' Grenzbach | |
| Wired to Kill | 1986 | re-recording mixer | |
| Apology | 1986 | TV Movie re-recording mixer | |
| Opposing Force | 1986 | sound re-recording mixer: Los Angeles - as Bud Grenzbach | |
| Crawlspace | 1986 | re-recording mixer - as Bud Grenzbach | |
| The Naked Cage | 1986 | re-recording mixer - as Charles Bud Grenzback | |
| Black Moon Rising | 1986 | re-recording mixer - as Charles 'Bud' Grenzbach | |
| Hamburger: The Motion Picture | 1986 | re-recording mixer - as Bud Grenzback | |
| Transylvania 6-5000 | 1985 | re-recording mixer - as Charles Bud Greenzbach | |
| American Ninja | 1985 | re-recording mixer - as Bud Grenzbach | |
| Howling II: ... Your Sister Is a Werewolf | 1985 | re-recording mixer - as Charles 'Bud' Grenzbach | |
| Def-Con 4 | 1985 | re-recording mixer | |
| Pole Position | 1984 | TV Series re-recording mixer - 13 episodes | |
| Gimme an 'F' | 1984 | re-recording mixer - as Charles Bud Grenzbach | |
| Missing in Action | 1984 | re-recording mixer - as Charles 'Bud' Grenzbach | |
| Night Shadows | 1984 | re-recording mixer - as Bud Grenzbach | |
| Up the Creek | 1984 | re-recording mixer - as Bud Greenzbach | |
| Voyage of the Rock Aliens | 1984 | sound recording mixer | |
| One More Chance | 1983 | re-recording mixer - as Bud Grenzbach | |
| The Vals | 1983 | re-recording mixer | |
| Time Walker | 1982 | re-recording mixer - as Bud Grenzbach | |
| Love Child | 1982 | re-recording mixer - as Charles W. Grenzbach | |
| Deadly Blessing | 1981 | re-recording mixer | |
| King of the Mountain | 1981 | re-recording mixer | |
| Seems Like Old Times | 1980 | re-recording mixer - as Bud Grenzbach | |
| The Formula | 1980 | re-recording mixer - as Bud Grenzbach | |
| HealtH | 1980 | sound re-recordist - as Bud Grenzbach | |
| The Shadow Box | 1980 | TV Movie re-recording mixer - as Bud Grenzbach | |
| Roadie | 1980 | re-recording mixer - as Bud Grenzbach | |
| The Ninth Configuration | 1980 | re-recording mixer - as Bud Grenzbach | |
| J-Men Forever | 1979 | re-recording mixer - as Bud Grenzbach | |
| The Prize Fighter | 1979 | re-recording mixer - as Bud Grenzbach | |
| The Onion Field | 1979 | re-recording mixer | |
| Winter Kills | 1979 | re-recording mixer - as Bud Grenzbach | |
| When You Comin' Back, Red Ryder? | 1979 | dialogue mixer - as Bud Grenzbach | |
| Slow Dancing in the Big City | 1978 | sound mixer: Dolby stereo - as Bud Grenzbach | |
| Stingray | 1978 | re-recording mixer - as Bud Grenbach | |
| The Manitou | 1978 | re-recording mixer - as Bud Grenzbach | |
| Grizzly | 1976 | re-recording mixer - as Bud Grenzbach | |
| Chinatown | 1974 | re-recording - as Bud Grenzbach | |
| The Parallax View | 1974 | sound re-recordist - as Bud Grenzbach | |
| Mean Streets | 1973 | re recording mixer - as Bud Grenzbach | |
| Let the Good Times Roll | 1973 | Documentary re-recording mixer | |
| Cancel My Reservation | 1972 | re-recording mixer - as Bud Grenzbach | |
| The Godfather | 1972 | re-recordist - as Bud Grenzbach | |
| Pocket Money | 1972 | sound - as Bud Grenzbach | |
| Jennifer on My Mind | 1971 | re-recording mixer - as Bid Grenzbach | |
| What's the Matter with Helen? | 1971 | sound re-recordist - as Bud Grenzbach | |
| Mad Dogs & Englishmen | 1971 | Documentary recording supervisor - as Bud Grenzbach | |
| Love Story | 1970 | sound recordist - as Bud Grenzbach | |
| The Odd Couple | 1968 | sound recordist | |
| No Way to Treat a Lady | 1968 | sound recordist | |
| Waterhole #3 | 1967 | sound recordist | |
| The Spirit Is Willing | 1967 | sound | |
| Gunn | 1967 | sound recordist | |
| El Dorado | 1967 | sound recordist | |
| Barefoot in the Park | 1967 | sound recordist | |
| Easy Come, Easy Go | 1967 | sound recordist | |
| The Swinger | 1966 | sound recordist | |
| Assault on a Queen | 1966 | sound recordist | |
| This Property Is Condemned | 1966 | sound recordist | |
| Nevada Smith | 1966 | sound recordist | |
| Paradise, Hawaiian Style | 1966 | sound recordist | |
| Boeing, Boeing | 1965 | sound recordist | |
| The Slender Thread | 1965 | sound recordist | |
| Village of the Giants | 1965 | sound recordist | |
| The Family Jewels | 1965 | sound recordist | |
| Tickle Me | 1965 | sound recordist | |
| Harlow | 1965/I | sound | |
| The Sons of Katie Elder | 1965 | sound recordist | |
| In Harm's Way | 1965 | sound | |
| The Disorderly Orderly | 1964 | sound recordist | |
| Roustabout | 1964 | sound recordist | |
| The Patsy | 1964 | sound recordist | |
| The Carpetbaggers | 1964 | sound recordist | |
| The Strangler | 1964 | sound recordist | |
| Paris When It Sizzles | 1964 | sound | |
| Love with the Proper Stranger | 1963 | sound recordist | |
| Who's Been Sleeping in My Bed? | 1963 | sound recordist | |
| Fun in Acapulco | 1963 | sound recordist | |
| Who's Minding the Store? | 1963 | sound recordist | |
| Donovan's Reef | 1963 | sound recordist | |
| The Nutty Professor | 1963 | sound recordist | |
| A Girl Named Tamiko | 1962 | sound | |
| Who's Got the Action? | 1962 | sound | |
| Girls! Girls! Girls! | 1962 | sound recordist | |
| It's Only Money | 1962 | sound recordist | |
| Hatari! | 1962 | sound recordist | |
| Escape from Zahrain | 1962 | sound recordist | |
| The Counterfeit Traitor | 1962 | sound recordist | |
| The Man Who Shot Liberty Valance | 1962 | sound recordist | |
| My Geisha | 1962 | sound | |
| Pocketful of Miracles | 1961 | sound recordist | |
| The Errand Boy | 1961 | sound recordist | |
| Blue Hawaii | 1961 | sound recordist | |
| Summer and Smoke | 1961 | sound recordist | |
| The Ladies Man | 1961 | sound recordist | |
| The Rebel | 1959-1961 | TV Series sound recordist - 62 episodes | |
| One-Eyed Jacks | 1961 | sound recordist | |
| All in a Night's Work | 1961 | sound recordist | |
| The Misfits | 1961 | sound recordist | |
| Cinderfella | 1960 | sound recordist | |
| Have Gun - Will Travel | 1960 | TV Series rerecording - 1 episode | |
| G.I. Blues | 1960 | sound recordist | |
| It Started in Naples | 1960 | sound | |
| The Bellboy | 1960 | sound recordist | |
| Visit to a Small Planet | 1960 | sound recordist | |
| Li'l Abner | 1959 | sound recordist | |
| But Not for Me | 1959 | sound recordist | |
| The Five Pennies | 1959 | sound recordist | |
| That Kind of Woman | 1959 | sound recordist | |
| Alias Jesse James | 1959 | sound | |
| The Young Captives | 1959 | sound recordist | |
| The Geisha Boy | 1958 | sound | |
| Houseboat | 1958 | sound recordist | |
| I Married a Monster from Outer Space | 1958 | sound recordist | |
| As Young as We Are | 1958 | sound recordist | |
| Rock-a-Bye Baby | 1958 | sound recordist | |
| King Creole | 1958 | sound recordist | |
| The Space Children | 1958 | sound recordist | |
| St. Louis Blues | 1958 | sound recordist | |
| Zero Hour! | 1957 | sound recordist | |
| Hear Me Good | 1957 | sound recordist | |
| The Joker Is Wild | 1957 | sound recordist | |
| Loving You | 1957 | sound recordist | |
| Beau James | 1957 | sound | |
| Fear Strikes Out | 1957 | sound recordist | |
| The Ten Commandments | 1956 | re-recording mixer - uncredited | |
| The Search for Bridey Murphy | 1956 | sound | |
$1.7 Million
