[{"data":1,"prerenderedAt":467},["ShallowReactive",2],{"docs":3,"doc:\u002Fdocs\u002Fformat\u002Ffingerprints":88},[4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84],{"path":5,"title":6,"description":7},"\u002Fdocs\u002Fcodemods","Codemods","A codemod is a small program that changes Live Sets. livesaver runs it over folders of sets, shows\nwhat would change, and with --apply writes the changes the same way every livesaver command\ndoes: the result must be well-formed XML, Live's backup scheme is followed\n(Backup\u002F\u003Cset> [date time].als), the run is journaled, and livesaver undo \u003Crun> puts every set\nback.",{"path":9,"title":10,"description":11},"\u002Fdocs\u002Fformat","Ableton Live file formats — what livesaver relies on","Facts collected from Live's own files (verified against real sets) and public research\n(Steinberg VST3 SDK, JUCE, Ableton's maxdevtools). Each page names its sources.",{"path":13,"title":14,"description":15},"\u002Fdocs\u002Fformat\u002Fcontainers","Containers and id spaces","How Live's files are packed: which are gzip-compressed XML and which are binary, what lies beside them, and how the ids inside a document are numbered.",{"path":17,"title":18,"description":19},"\u002Fdocs\u002Fformat\u002Ffileref","FileRef","A \u003CFileRef> locates one file. It appears in many containers, but only some are real dependencies.",{"path":21,"title":22,"description":23},"\u002Fdocs\u002Fformat\u002Ffinder","Finder tags, comments and plug-in bundles (macOS)","What status, reorg and the plug-in inventory read and write outside Live's own files.",{"path":25,"title":26,"description":27},"\u002Fdocs\u002Fformat\u002Ffingerprints","Fingerprints","How Live recognises a file again: the size and the checksum it stores with every reference, where vendors and pack updates break that, and what livesaver compares instead.",{"path":29,"title":30,"description":31},"\u002Fdocs\u002Fformat\u002Flive-setup","Live installation and library locations","Where Live keeps its app resources, its library folders and its own databases, and how livesaver finds them without being told. Everything below was read on a Mac; Windows is at the end, from Ableton's documentation.",{"path":33,"title":34,"description":35},"\u002Fdocs\u002Fformat\u002Fplugins","Plug-ins in Live Sets","How a Live Set stores a plug-in in each format, how the same plug-in is recognised across formats, and what an upgrade from VST2 to VST3 has to carry over.",{"path":37,"title":38,"description":39},"\u002Fdocs\u002Fformat\u002Fversions","\u003CAbleton> root attributes per Live version","The root is \u003CAbleton MajorVersion MinorVersion SchemaChangeCount Creator Revision>. Creator is \"Ableton Live x.y.z\".",{"path":41,"title":42,"description":43},"\u002Fdocs\u002Fguide\u002Fbrowser","In the browser","The app also runs on its own, as a page in your browser. It reads the folders you give it and changes nothing: good for a first look, or on a computer where you cannot install anything. In Chrome and Edge it can also fix samples and upgrade plug-ins, if you switch that on: see Fixing in the page.",{"path":45,"title":46,"description":47},"\u002Fdocs\u002Fguide\u002Fcommand-line","The command line","Everything the app does, the livesaver command does too, and more: project status in Finder, a catalog of your sets to search, and codemods. Every command only plans unless you pass --apply.",{"path":49,"title":50,"description":51},"\u002Fdocs\u002Fguide\u002Fgetting-started","Getting started","livesaver finds the samples your Ableton Live sets have lost, collects them into their projects, and shows which plug-ins are missing. This page takes you from nothing to your first scan.",{"path":53,"title":54,"description":55},"\u002Fdocs\u002Fguide\u002Fhistory","History and undo","Everything livesaver changes is written down as a run: what it was asked, every step it took, and the original of every set it rewrote. That is what makes an undo possible, also weeks later.",{"path":57,"title":58,"description":59},"\u002Fdocs\u002Fguide\u002Fmissing","When samples stay missing","A fix can only find what is in the folders it searches. What stays missing is listed by where it came from, because what helps differs: a pack is installed again, an old drive is plugged in, a folder is added.",{"path":61,"title":62,"description":63},"\u002Fdocs\u002Fguide\u002Fplugins","Plug-ins","Live finds a plug-in by its format and its id, never by its name. livesaver reads which plug-ins your sets use and compares them with what is installed, the way Live does, so you know before you open a set what will be missing in it.",{"path":65,"title":66,"description":67},"\u002Fdocs\u002Fguide\u002Fquestions","Questions and answers","Short answers to what comes up first. If yours is not here, ask on GitHub.",{"path":69,"title":70,"description":71},"\u002Fdocs\u002Fguide\u002Fsafety","How your work is kept safe","livesaver edits the files your music lives in. These are the rules it keeps, so that nothing is lost.",{"path":73,"title":74,"description":75},"\u002Fdocs\u002Fguide\u002Fsamples","Fix missing samples","A set that has lost its samples opens in Live with “Media files are missing”. livesaver finds the files again by what they are, puts them into the project, and points the set at them, for every project at once.",{"path":77,"title":78,"description":79},"\u002Fdocs\u002Fguide\u002Fwindows","livesaver on Windows","livesaver is made and tested on a Mac. Windows is new: it is built from what Ableton documents about Live on Windows and from the way sets that were saved on Windows store their files. No one has tried it on a Windows computer with Live yet. This page says what is there, what differs from a Mac, and what is not known.",{"path":81,"title":82,"description":83},"\u002Fdocs\u002Fverification","Verification","What is checked, and how to repeat it. Checks on a real library are read-only; everything that\nwrites runs on temporary copies.",{"path":85,"title":86,"description":87},"\u002Fdocs\u002Fweb","The web app","apps\u002Fweb is one app (Vite, Vue, Nuxt UI) that runs in two situations:",{"id":89,"title":26,"body":90,"description":27,"extension":461,"meta":462,"navigation":463,"path":25,"seo":464,"stem":465,"__hash__":466},"docs\u002Fdocs\u002Fformat\u002Ffingerprints.md",{"type":91,"value":92,"toc":453},"minimark",[93,97,100,113,178,181,271,282,286,416,420,427,450],[94,95,26],"h1",{"id":96},"fingerprints",[98,99,27],"p",{},[101,102,104,108,109,112],"h2",{"id":103},"originalcrc-crc-crc-16umts-over-the-first-16-kb",[105,106,107],"code",{},"OriginalCrc"," \u002F ",[105,110,111],{},"Crc"," = CRC-16\u002FUMTS over the first 16 KB",[114,115,116,131,142,172],"ul",{},[117,118,119,120,123,124,127,128,130],"li",{},"Algorithm: width 16, poly ",[105,121,122],{},"0x8005",", init ",[105,125,126],{},"0",", no reflection, xorout ",[105,129,126],{}," (a.k.a. CRC-16\u002FBUYPASS).",[117,132,133,134,137,138,141],{},"Check value: ",[105,135,136],{},"\"123456789\""," → ",[105,139,140],{},"0xFEE8",".",[117,143,144,145,148,149],{},"Computed over the first ",[105,146,147],{},"min(size, 16384)"," bytes. Paired with the file size:\n",[114,150,151,159],{},[117,152,153,154,108,157],{},"new format: ",[105,155,156],{},"OriginalFileSize",[105,158,107],{},[117,160,161,162,108,165,167,168,171],{},"old format: ",[105,163,164],{},"SearchHint\u002FFileSize",[105,166,111],{}," (with ",[105,169,170],{},"MaxCrcSize"," = 16384)",[117,173,174,177],{},[105,175,176],{},"0 \u002F 0"," means \"no fingerprint\". Generators often write that, and Live still loads such files.",[98,179,180],{},"Evidence (research agent, 2026-09-30): the CRC was recomputed for files Live had saved, at the exact commit where the file size matched.",[182,183,184,206],"table",{},[185,186,187],"thead",{},[188,189,190,194,197,200,203],"tr",{},[191,192,193],"th",{},"Saved by",[191,195,196],{},"File",[191,198,199],{},"Size",[191,201,202],{},"Stored",[191,204,205],{},"Computed",[207,208,209,233,253],"tbody",{},[188,210,211,219,225,228,231],{},[212,213,214,215,218],"td",{},"Live 9.6 (",[105,216,217],{},"SearchHint\u002FCrc",")",[212,220,221,222],{},"m4l-connection-kit ",[105,223,224],{},"OSC Leap Motion.amxd",[212,226,227],{},"234,834",[212,229,230],{},"63076",[212,232,230],{},[188,234,235,238,244,247,250],{},[212,236,237],{},"Live 11.3.13",[212,239,240,241],{},"maxdevtools ",[105,242,243],{},"Test.amxd",[212,245,246],{},"19,428",[212,248,249],{},"37031",[212,251,252],{},"37031 (the whole-file CRC would be 42025)",[188,254,255,258,263,266,269],{},[212,256,257],{},"Live 12.0",[212,259,240,260],{},[105,261,262],{},"DoneLoading.amxd",[212,264,265],{},"3,520",[212,267,268],{},"15618",[212,270,268],{},[98,272,273,274,277,278,281],{},"The fixture ",[105,275,276],{},"fixtures\u002Fsamples\u002FLib1\u002FKick\u002F1.wav"," gives ",[105,279,280],{},"(2000324, 17226)",". Around 31 other CRC-16 variants and byte ranges were tried, and none matched. abletoolz's README still lists this as unsolved.",[101,283,285],{"id":284},"exceptions-used-when-matching","Exceptions used when matching",[114,287,288,346,367,397,406],{},[117,289,290,294,295],{},[291,292,293],"strong",{},"Vendor re-saves."," Native Instruments and Ableton re-saved library files with a padding byte or appended metadata, which changes only the RIFF\u002FFORM size field in the first 16 KB.\n",[114,296,297,325,328],{},[117,298,299,300,303,304,307,308,311,312,315,316,319,320,324],{},"Recompute the CRC with bytes 4–8 set to ",[105,301,302],{},"size − k"," for ",[105,305,306],{},"k ∈ {7, 8, 9}"," (",[105,309,310],{},"\u003CI"," for RIFF, ",[105,313,314],{},">I"," for FORM), where ",[105,317,318],{},"size"," is the ",[321,322,323],"em",{},"stored"," size.",[117,326,327],{},"This counts as verified.",[117,329,330,331,334,335,338,339,342,343,141],{},"Only for samples with ",[105,332,333],{},"crc ≠ 0",", candidates inside a vendor root (Factory Packs, Core Library, ",[105,336,337],{},"vendorLibraries"," such as ",[105,340,341],{},"\u002FUsers\u002FShared","), and ",[105,344,345],{},"0 \u003C |Δsize| ≤ 8192",[117,347,348,351,352],{},[291,349,350],{},"Pack samples."," Ableton updated pack files in place, so the same size is enough.\n",[114,353,354,361],{},[117,355,356,357,360],{},"Applies when the ref is a pack sample (",[105,358,359],{},"LivePackName"," set, type 5, or \"core library\"\u002F\"factory packs\" in the stored path, lowercased) or the candidate lies in an installed pack.",[117,362,363,364,141],{},"Marked ",[291,365,366],{},"uncertain",[117,368,369,372,373,376,377],{},[291,370,371],{},"Library files with other tags"," (opt-in: ",[105,374,375],{},"--match-library-path","). Vendors also changed the tags of samples between library versions, and tags sit after the audio. A sample shorter than 16 KB has them inside the fingerprint, so the installed file can never match it.\n",[114,378,379,389,394],{},[117,380,381,382,385,386,141],{},"Used when nothing above matched: the candidate lies inside a vendor root, its last 4 path components equal those of the stored path (the file name plus three folders, e.g. ",[105,383,384],{},"Samples\u002FDrums\u002FShaker\u002FShaker 1.wav",", so a renamed library folder still counts), and ",[105,387,388],{},"|Δsize| ≤ 16",[117,390,363,391,393],{},[291,392,366],{},": the audio cannot be confirmed.",[117,395,396],{},"Not for Max devices.",[117,398,399,402,403,141],{},[291,400,401],{},"crc = 0 and size > 0:"," a size match counts as ",[291,404,405],{},"certain",[117,407,408,411,412,415],{},[291,409,410],{},"Max devices:"," exact fingerprint only. Without a stored size, all candidates must be byte-identical (",[105,413,414],{},"content_hash",").",[101,417,419],{"id":418},"audio-hash-tie-breaking","Audio hash (tie-breaking)",[98,421,422,423,426],{},"When several candidates tie on the longest path ending, they are accepted only if their ",[291,424,425],{},"audio data"," is identical:",[114,428,429,447],{},[117,430,431,432,435,436,439,440,435,443,446],{},"SHA-1 over only the ",[105,433,434],{},"fmt "," + ",[105,437,438],{},"data"," chunks (RIFF, little-endian sizes) or ",[105,441,442],{},"COMM",[105,444,445],{},"SSND"," (FORM, big-endian); chunks are padded to even lengths.",[117,448,449],{},"Otherwise, a SHA-1 of the whole file.",[98,451,452],{},"This reduced ambiguous matches on the real library from 2,285 to 2.",{"title":454,"searchDepth":455,"depth":455,"links":456},"",2,[457,459,460],{"id":103,"depth":455,"text":458},"OriginalCrc \u002F Crc = CRC-16\u002FUMTS over the first 16 KB",{"id":284,"depth":455,"text":285},{"id":418,"depth":455,"text":419},"md",{},true,{"title":26,"description":27},"docs\u002Fformat\u002Ffingerprints","Axepe1epycjtjeV8zsKHVJQlAdD82fOUi1RqSxmTtQ8",1791245844233]