Where things are adapted to audio-only media such as Radio, Audiobooks, or Audio Plays. Some are full adaptations, usually from Literature, Comic Books, or Manga, giving the then silent characters voices. Others are side-stories for the franchise released in an immerse world of sound, a favorite path for animated fare since, after all, they already have the voice actors and sound effects. Some particular pitfalls of this kind of adaptation include Narrating the Obvious (where descriptive text is just put directly into the mouth of one of the characters present, making them sound like an interpreter for the blind) and No Pronunciation Guide. This is especially common in Japan. Since they're pretty cheap to produce (you just need the actors, some sound effects, and mixing equipment to make them), a popular work, be it manga, anime, a Video Game or what have you will often get several "Drama CDs" as spinoffs, pseudo-sequels, prequels and interquels to fill in the world and characters. Since the production values aren't too high and for better franchises the actors can like doing them, you can produce a fair number of them and still make a good profit. However, their all-audio nature makes exporting them a nightmare. Drama CDs are the #1 source of All There in the Manual problems for exported Japanese products; because the form is very uncommon in America, there's no real place to sell them, unionised actors drive costs up, etc. As a result, these basically never leave Japan, which can end up being hugely problematic for fans overseas who are missing parts of the story (and for any producers who care about exporting, since they know it's all but impossible for overseas fans to get that part of the story). The BBC also produce a fair few of these for broadcast on Radio 4, including some regular features such as "Book at Bedtime" and "Saturday Play". Contrast with Sound to Screen Adaptation.
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Anime & Manga
- Lots of manga and anime have audio dramas, from Nadia: The Secret of Blue Water to Count Cain to Gankutsuou. Then there's the "Nyoron Churuya" audio drama. Usually, these only exist in Japanese.
- A great number of manga and Light Novels have Drama CDs released before, during and after their animated adaptations. Sometimes the voice actors between the Drama CD version and the anime version can change. Many a Visual Novel also has a Drama CD included, usually as a bonus. This isn't much of a stretch either, since the line between visual novel and audio adaptation is thin.
- The Sound Stages of Magical Girl Lyrical Nanoha have been an integral part of the franchise from the start, giving additional side-adventures, back-stories, and setting information that would get referenced in the main part of the series, with certain tidbits in the anime only becoming clear if you've listened to these. The biggest one of these is Striker S Sound Stage X, an entire Story Arc set three years after the third season.
- The Slayers has several set between anime seasons:
- Slayers EX (Extra) and Slayers N>EX: Set after the first season and second seasons, there are four stories based off of the prequel Slayers Special novels, but they implement Lina's allies instead of Naga. Naga does appear in N>EX, though.
- The Return of Slayers EX: Five original stories set after seasons 2 and 3, including a run-in with bugs in Saillune's sewer system, meeting baby Val (the reincarnation of the Big Bad of season 3), a hysterical failed attempt to help Zelgadis with his body, and Lina and Naga reminiscing during their old age.
- Slayers Nextra: Set after the second season, a full-scale adventure, unlike the others.
- A prologue and epilogue for the Slayers Premium Non-Serial Movie; the prologue creates an issue in continuity by setting two seasons five years apart, which supposedly isn't true in-universe.
- Two dramas based off of the fourth and fifth seasons of the anime; there is an epilogue story for the one based on Evolution-R.
- A Crossover story starring the Slayers cast and the Sorcerous Stabber Orphen cast.
- Mahou Sensei Negima! and Negima!? had some drama CDs, which if nothing else, are notable for actually referencing the fandom's popular "KonoSetsu" Portmanteau Couple Name in one of the tracks.
- A more recent one is the Ala Rubra Drama CD. Specifically the following:
- Breaking Arika out of the prison.
- A Hot Springs Episode where the men of Ala Rubra try to take Eishun's glasses.
- Reenacting the part where Eishun is the Nabe Shogun and Rakan defeats him yet again with the same trick.
- Nagi VS Rakan. From fighting, an endurance race in the hot springs AND bungee jumping.
- THE ENTIRE Ala Rubra ships Nagi and Arika together. Even Rakan gives an example on how to sweet talk Arika to Nagi. Everyone's impressed except for Nagi who just laughs at it.
- A more recent one is the Ala Rubra Drama CD. Specifically the following:
- Mobile Suit Gundam Wing had a radio play called Blind Target, complete with its own theme songs, which was later adapted into a manga (causing a form of Adaptation Displacement in America).
- Both the manga and anime versions of Chrono Crusade spawned drama CDs. The anime version is particularly notable for being a High School A.U. and allowing the voice actors from the anime to purposefully make fun of their characters by being as hammy as possible.
- A really notorious example is Getter Robo Armageddon, which was the animation sequel... to a popular, long-running radio drama based on the Getter franchise that 99% of anime fans had never even heard of when Armageddon first made its way to America. Fans end up missing a fair bit of backstory as a result.
- So Ra No Wo To has two audio dramas. One which explains the deal with the ghost which kicked off the events of the second episode, only to be forgotten by the end. The other tells of how Filicia and Rio first met, along with an explanation of the history of Helvetia after The Great Off Screen War, at least as far as the characters know.
- Puella Magi Madoka Magica has four Drama CDs - three of which were packaged in the home video releases and one that was released at a convention. The even numbered CDs are probably non-canon since they are light-hearted Slice of Life Self Parodies of the series. However, the odd numbered CDs contain rather important background information including the identity of the cat seen in the anime's Title Sequence and the prior relationship between Mami and Kyoko that was only implied in the anime. (The latter would actually get a Comic Book Adaptation in a Spin-Off entitled Puella Magi Madoka Magica: The Different Story.)
- Incidentally, an interview with the writer for some of the Drama CDs revealed that originally they would have been a direct continuation of the anime's events.
- Superman has been adapted to radio form many times. The first one gave birth to the popular "It's a bird! It's a plane!" opening, and was responsible for creating kryptonite as well. It was also possibly responsible for killing the KKK.
- Batman likewise has had a few stints, albeit brief, Knightfall being adapted by The BBC.
- Graphic Audio has since joined with DC to bring a number of the company's properties into "Long Car Ride" radio versions, including both original stories, and adaptations of many a Crisis Crossover. The Infinite Crisis one is particularly good.
- In the late '70s, there was a short-lived radio show version of Fantastic Four. It reasonably faithfully followed the original comic issues, but is probably best known as a very early role of a pre-Saturday Night Live Bill Murray, playing Johnny Storm.
- All three original Star Wars movies had radio play adaptations broadcast by NPR: Star Wars in 1981, The Empire Strikes Back in 1983, and Return of the Jedi in 1996. The first one is very famous for including a whole lot of stuff that ended up on the cutting room floor of the original movie, including early scenes on Alderaan with King Organa, a long chat between Biggs Darklighter and Luke that established both their characters, and a greatly expanded interrogation scene between Vader and Leia.
- As have the following comic book arcs: Tales of the Jedi Knights of the Old Republic, TOTJ Freedon Nadd Rebellion, TOTJ Dark Lords of the Sith, Dark Empire I, II and Empire's End, Crimson Empire, and the three Dark Forces graphic novels. Oddly enough, they never finished them by releasing the two more Tales of the Jedi arcs featuring Ulic Qel-Droma as well as making Crimson Empire II. Dark Empire has some script changes.
- The Radio show Lux Radio Theatre was a long-running program adapting hit (and some lesser) movies to radio drama form. It was produced and hosted by Cecil B. DeMille.
- The Lux adaptation of It's a Wonderful Life was recently remade, with Bill Pullman as George Bailey.
- BBC Radio has produced lots of adaptations of books, many of them starring well-known actors like Christopher Lee and David Warner.
- The Lord of the Rings, with full cast and sound effects. Interestingly, it starred Ian Holm as Frodo (Holm would go on to play Bilbo in Peter Jackson's live-action films) and featured Peter Woodthorpe as Gollum (Woodthorpe had previously voiced the character in Ralph Bakshi's 1978 animated Lord of the Rings film); Woodthorpe's Gollum had a pretty clear influence on Andy Serkis'.
- The Hobbit, with full cast, sound effects, and original material (such as Bilbo talking back to the narrator)
- All of the Sherlock Holmes stories, with full cast and sound effects
- The Discworld novels Guards! Guards!, The Amazing Maurice and His Educated Rodents, Night Watch, Small Gods and Eric adapted for radio, with full cast and sound effects.
- A number of Robert Rankin novels, including Brightonomicon and the Brentford Trilogy, with full cast and sound effects
- Mary Shelley's Frankenstein (full cast, sound effects)
- Ghost stories by a variety of authors (full casts, sound effects)
- A number of Tintin's adventures. In these adaptations, Snowy takes on the role of extraneous narration and comic relief that can't be accomplished through dialogue and would have been accomplished through artwork in the original (and is voiced by Andrew Sachs).
- The His Dark Materials trilogy - although there are actually two adaptations of this one: a radio adaptation and a full-cast unabridged recording, narrated by author Philip Pullman. Both were produced by the BBC.
- The Foundation Trilogy (full cast, sound effects, recorded at the BBC Radiohonic Workshop and one of the BBC's first ever stereophonic radio productions)
- War and Peace, full cast, sound effects
- Adrian Mole. In fact, original Adrian Mole monologues were written for Pirate Radio 4, a teenage magazine show that also included Doctor Who: Slipback (below). These were recursively adapted into "Adrian Mole at the BBC" in True Confessions of Adrian Albert Mole.
- Charlie and the Chocolate Factory got this treatment (full cast, sound effects) in The '80s.
- Neverwhere and Good Omens, with full cast and sound effects.
- Len Deighton's Bomber, split into sections and broadcast over the course of an entire day, with each section taking place in Real Time.
- Many, many, many adaptations of Charles Dickens.
- American publishers don't do this as often, but there have been full-cast recordings of:
- Robert A. Heinlein's Have Space Suit, Will Travel and "The Green Hills of Earth"
- Many of HP Lovecraft's novels and stories
- Star Trek novels, narrated by George Takei and guest starring Leonard Nimoy and William Shatner.
- Long before the Star Trek audiobooks, audio plays featuring the original cast were produced in LP format.
- Many Star Wars novels as well, including Matt Stover's greatly respected novelization of Revenge of the Sith. Many of these audio adaptations even include sound effects and music from John Williams's scores.
- Quite a few Isaac Asimov stories
- Many of Edgar Allan Poe's stories
- World War Z was adapted with a full cast
- Stephen King is a big audiobook fan. The audiobook release of his massive Nightmares and Dreamscapes collection starred different narrators for every story, including such luminaries as Grace Slick, Yeardley Smith (yes, that Yeardley Smith. If you think King is creepy on the page, wait until you hear Lisa Simpson narrating it!), Joe Mantegna, and Tim Curry.
- Even though the first two books of The Hitchhiker's Guide to the Galaxy were originally radio plays (and then adapted to other media), the three of the last four were books first and later adapted for radio.
- The Shadow counts, even though the magazine was inspired by the "narrator" of a mystery radio show. The magazine started in 1931, the radio adaptation in 1937.
- An unusual case is Kenneth Williams' reading of Nikolai Gogol's Diary of a Madman. This was originally recorded as the narration for an animated adaptation, but the animation was never completed and the recording was eventually broadcast as a radio monologue by The BBC.
- Ulver adapted William Blake's The Marriage of Heaven and Hell into a two-disc album, using the poem as the lyrics in it's entirety.
- Focus on the Family (responsible for Adventures in Odyssey) has a radio drama arm, appropriately titled Focus on the Family Radio Theatre. Among other things, they have produced:
- Gap Digital produced Dramatic Audio presentations of the twelve main books in the Left Behind series.
- Over 2012-13, Penguin Audio released new unabridged audiobook versions of many of Roald Dahl's works, covering most of his adult short story collections and the bulk of his novels and poetry collections for children. Though none qualified as full-cast recordings, an All-Star Cast of narrators was assembled and some of the children's novels warranted sound effects as well (James and the Giant Peach, Charlie and the Chocolate Factory, etc.).
Live Action TV
- Doctor Who has a lot of these.
- The BBC have produced a few radio adaptations of serials such as "Genesis of the Daleks".
- Official BBC-produced original radio plays have been produced as far back as 1986's "Slipback".
- Officially licensed audio plays by Big Finish, featuring the continuing adventures of Doctors Five, Six, Seven, and Eight (and later Four), now number in the hundreds. Quality is generally considered very high, especially for Colin Baker's Sixth Doctor.
- An outfit called BBV produced audio plays and series of varying officialness during the Eighties and Nineties: one starring Colin Baker and Nicola Bryant as "The Stranger" and "Miss Brown"; one starring Lalla Ward and John Leeson as "The Mistress" and "K-9"; and one starring Sylvester McCoy and Sophie Aldred as "The Professor" and "Ace". The first two were official, but the last wasn't—and the BBC stepped in to force some more filing-off of serial numbers.
- BBC Audio has produced several audiobooks featuring the Tenth and Eleventh Doctors. They also created three series of Fourth Doctor audio dramas, starring Tom Baker and Richard Franklin (reprising his role as Third Doctor "companion" Mike Yates).
- BBC Radio produced a few audio dramas of Torchwood, that originally aired on BBC Radio 4. The first celebrated the switching on of the Large Hadron Collider. This was followed by one three-episode series of plays to bridge the gap between series 2 and 3, and another, Torchwood: The Lost Files to bridge the gap between 3 and 4.
- BBC Audio made some audiobooks of The Sarah Jane Adventures.
- There have been a few instances of BBC SitComs transferring from TV to radio:
- Have Gun — Will Travel was one of the few television shows that then had an adaptation for radio, as opposed to the other way around.
- Various adaptation of Kamen Rider, in tapes.
- Radio 4's six part Neverwhere technically belongs under TV, although Neil Gaiman would probably rather you considered it an adaptation of a book.
- Orson Welles became famous with his The Mercury Theatre on the Air, which adapted works of literature, both stage plays like Sherlock Holmes and novels like The Pickwick Papers. His most famous broadcast, and probably the all-time most famous instance of this trope, is the October 30, 1938 broadcast The War of the Worlds, which adapted the novel by H. G. Wells.
- Especially in the 1960s and 70s, a huge number of record albums were recorded for children by studios like Power Records. They adapted everything from classic novels like Melville's Moby-Dick and Barrie's Peter and Wendy, to superhero stories (some adapted from comics, some original) and TV shows like Josie and the Pussycats, to nursery rhymes and fables from Aesop.
- The Reduced Shakespeare Radio Show, a 6-part series produced by the BBC World Service, is essentially an Adaptation Expansion of The Complete Works of William Shakespeare (Abridged).
- The Moth, a popular New York true storytelling series, did shows for ten years before releasing the audio as a podcast and then the NPR show The Moth Radio Hour.
- Trails In The Sky has a whole bunch of these, focusing on various characters and expanding on them. Even with the games coming to America at last, we're quite unlikely to see these.
- Final Fantasy Tactics Advance has a Radio Drama adaptation called Final Fantasy Tactics Advance Radio Edition.
- Ever17 has two Drama CDs, After You've Gone and 2035, both being Post Script Seasons.
- Riviera: The Promised Land has three drama CDs — one of a promotional nature (the Prelude disc), one containing mostly gag stories and voiced scenes from the game with a single serious original drama explaining antagonist Malice's backstory (the Epilogue disc), and a third containing a series of long episodic adventures (The Precious Chapter). Even when the first two were in print, it was a nightmare trying to buy them, as none of the Japanese vendors selling them shipped overseas. Luckily for (Japanese-speaking) fans, the third didn't have this problem.
- Likewise, Yggdra Unison was given a drama CD, featuring three episodic stories starring some of the more popular characters. The cast has expressed hopes of being able to produce more, although we've heard nothing from them on the subject since.
- The Putt-Putt series had a book titled Putt-Putt's Night Before Christmas, which came with an audio cassette of the same name.
- The Freddi Fish series had a book titled Sing Along with Freddi Fish and her Friends, which came with an audio cassette of the same name.
- The Mega Man Zero series had audio tracks included on each of its soundtrack releases. The story importance of these tracks ranged from trivial (such as how Alouette came up with the names for the Baby Elves) to vital, such as explaining Elpizo's backstory (including how he got his name), how Phantom knew about Omega's true nature, or why the Guardians chose to help Zero at the end of the third game.
- The Japanese version of Elemental Gearbolt includes an unlockable audio drama version of an event mentioned in-game, in which the main characters meet as children and promise to reunite. It was Dummied Out of the English release, but the localizer summarized the story in the manual.
- Fire Emblem Awakening has four CD dramas, each with different stories. The first one (with a male Avatar) depicts the days around Chrom's marriage and focuses on character interactions and some ambushes by Risen. The second (with a Female Avatar) revolves around someone's serious Sick Episode and the aftermath of Emmeryn's Heroic Suicide, alongside Henry and Lucina/"Marth"'s sort-of Teeth-Clenched Teamwork. The third (no defined Avatar) is all about the already Bad Future that Lucina and her fellow Second Generation characters are about to leave. The fourth and last one (also w/o a defined Avatar) is noticeably Lighter and Softer and about Lucina and the children's struggle to find Lucina's precious tiara and both Morgans incidentally meeting up with each other in the Outrealms.
- There are many CD Dramas for for The King of Fighters, usually one or two per game, with individual characters sometimes getting their own CDs. They go from very cracky skits bordering on Gag Dubs, to pretty interesting characterization-wise (i.e. Dengeki Bunko explains how both the Japan Team and the Women's Team came to be among other things, The Sun and The Moon chronicles Iori Yagami's life outside KOF and the Yagami/Kusanagi feud at an unspecified time in the past, and KOF 2000 gives more background on K' and his group while also featuring Athena's misadventures through the world until she finds Kyo and they have a more serious talk about how everyone misses him at home).
- Castlevania: Symphony of the Night has a CD Drama available only in Japan which takes place a year after the events of the game, and also confirms which of the good endings is canon (Maria chases Alucard).
- New Dynamic English has a radio show produced for Voice of America.
- Dan and Mab's Furry Adventures has an "unofficial" Radio Play here that has currently produced three episodes covering the story arcs "Warrior for Hire," "Recipe for Disasters," and Part I of "The Return of Dark Pegasus," with Part II in the works as of October 2010.
- Slightly Damned has a Radio Drama adaptation here that currently consists of two episodes covering the first 63 pages, with episode three (set to be pages 64-93) well under way as of October 2010.
- Welcome To Room 305 has received a Korean Radio Drama.
- When Nickelodeon cancelled Invader Zim, seven of the unfinished episodes already had their voice tracks recorded, so they were later released on the (now out of print) Special Features DVD.
- My Little Pony: Friendship Is Magic has a series of German albums in CD and MP3 formats, each album containing two Freundschaft ist Magie episodes. Volume 1, Ein Auftrag von Prinzessin Celestia, contains "Ein Auftrag von Prinzessin Celestia (Teil 1)" and "Ein Auftrag von Prinzessin Celestia (Teil 2)". Volume 2, Apfelschüttelernte, contains "Eine Freundin hat's nicht leicht" and "Apfelschüttelernte". Volume 3, Angeber-Trixie, contains "Gilda, die Partybremse" and "Angeber-Trixie". Volume 4, Die Pyjama-Party, contains "Drachenscheu" and "Die Pyjama-Party". Volume 5, Das fremde Zebra, contains "Das fremde Zebra" and "Fürchterlich niedliche Tierchen". Volume 6, Etwas ganz Besonderes, contains "Frühlingsanfang in Ponyville" and "Etwas ganz Besonderes". Volume 7, Die Modenschau, contains "Das Blätterrennen" and "Die Modenschau". Volume 8, Pinkie Weisheiten, contains "Pinkie Weisheiten" and "Rainbows großer Tag". Volume 9, Die Showstars, contains "Babysitter Fluttershy" and "Die Showstars". Volume 10, Fluttershy auf dem Laufsteg, contains "Diamanten-Hunde" and "Fluttershy auf dem Laufsteg".
- The Wallace & Gromit book Anoraknophobia was adapted for cassette featuring Peter Sallis as Wallace.
- A 1960s adaptation of Gogol's "Diary of a Madman" starring Kenneth Williams was never released, but the soundtrack was later broadcast by The BBC as a one-man radio play, with few alterations necessary.