[{"data":1,"prerenderedAt":401},["ShallowReactive",2],{"docs-page-en-index":3,"docs-nav-en":361},{"data":4,"body":11,"toc":339},{"title":5,"description":6,"nav":7,"order":8,"eyebrow":9,"lede":10},"How SmeggTuner works, and how to tune with it.","","Overview",1,"Documentation","The vocabulary of accordion reeds, the workflow the app is built around, and the three rooms you work in.",{"type":12,"children":13},"root",[14,23,29,36,41,47,52,58,63,69,74,80,85,91,96,101,114,120,125,131,136,147,157,167,172,178,183,228,234,239,243,249,254,259,265,270,276,288,298,304,309,315,320,324,329,334],{"type":15,"tag":16,"props":17,"children":19},"element","h2",{"id":18},"the-vocabulary",[20],{"type":21,"value":22},"text","The vocabulary",{"type":15,"tag":24,"props":25,"children":26},"p",{},[27],{"type":21,"value":28},"A few words do a lot of work here. They are the trade's, not ours.",{"type":15,"tag":30,"props":31,"children":33},"h3",{"id":32},"reed-voice",[34],{"type":21,"value":35},"Reed (voice)",{"type":15,"tag":24,"props":37,"children":38},{},[39],{"type":21,"value":40},"One vibrating tongue, głos in Polish. A single note can sound several reeds at\nonce, and each one is tuned on its own.",{"type":15,"tag":30,"props":42,"children":44},{"id":43},"register-banks-and-feet",[45],{"type":21,"value":46},"Register, banks and feet",{"type":15,"tag":24,"props":48,"children":49},{},[50],{"type":21,"value":51},"A register is what a switch turns on. The banks are the ranks of reeds inside the\nbox: L (16', an octave below the key), M1 \u002F M2 \u002F M3 (up to three 8' ranks at\nconcert pitch) and H (4', an octave above). A register is its reed count, so\nLMMM sounds four reeds.",{"type":15,"tag":30,"props":53,"children":55},{"id":54},"beating-tremolo",[56],{"type":21,"value":57},"Beating (tremolo)",{"type":15,"tag":24,"props":59,"children":60},{},[61],{"type":21,"value":62},"Two reeds a little apart beat at their difference in hertz, and that pulsing is\nthe tremolo, the musette sound, dudnienie in Polish. Tuning a musette is not\nmaking it zero: a wide beat there is correct, and a tuner that paints it red is\nlying.",{"type":15,"tag":30,"props":64,"children":66},{"id":65},"the-beating-curve",[67],{"type":21,"value":68},"The beating curve",{"type":15,"tag":24,"props":70,"children":71},{},[72],{"type":21,"value":73},"What the tremolo should be, note by note. Without it the app can only tell you\nhow far a reed sits from the bare scale, not whether it is right. You draw the\ncurve, or fit it to the instrument's own recording.",{"type":15,"tag":30,"props":75,"children":77},{"id":76},"a-pass",[78],{"type":21,"value":79},"A pass",{"type":15,"tag":24,"props":81,"children":82},{},[83],{"type":21,"value":84},"One trip through the instrument, everything caught in a single sitting. Its A4\nreference is frozen at the start, because a pass measured against a moving\nreference is worthless.",{"type":15,"tag":30,"props":86,"children":88},{"id":87},"bellows-direction",[89],{"type":21,"value":90},"Bellows direction",{"type":15,"tag":24,"props":92,"children":93},{},[94],{"type":21,"value":95},"Every note has two reeds: one that sounds on the press, one on the draw. They are\ndifferent tongues on opposite faces of the same plate, both of them tuned, and\nthey drift apart on their own. You set the direction and the recorder stamps it\non every reading, so the card can say which of the two a number belongs to. This\nis true of every accordion, not only a button box.",{"type":15,"tag":24,"props":97,"children":98},{},[99],{"type":21,"value":100},"The control appears once a session is open, because the direction is something a\nsession records; there is nothing to stamp without one.",{"type":15,"tag":24,"props":102,"children":103},{},[104,106,112],{"type":21,"value":105},"Bisonoric is a separate thing. On a diatonic button box a key sounds a different\n",{"type":15,"tag":107,"props":108,"children":109},"em",{},[110],{"type":21,"value":111},"note",{"type":21,"value":113}," pushing than pulling. That changes what you play, not whether the\ndirection is worth recording.",{"type":15,"tag":30,"props":115,"children":117},{"id":116},"the-merged-pair",[118],{"type":21,"value":119},"The merged pair",{"type":15,"tag":24,"props":121,"children":122},{},[123],{"type":21,"value":124},"Low on the keyboard a musette pair can sit too close to split into two peaks.\nWhen it does, SmeggTuner shows the one honest reading, the beat between them, and\nprints no separate reed numbers instead of inventing a plausible wrong one. A\nmissing number costs nothing; a wrong one costs a reed.",{"type":15,"tag":16,"props":126,"children":128},{"id":127},"why-the-numbers-behave-as-they-do",[129],{"type":21,"value":130},"Why the numbers behave as they do",{"type":15,"tag":24,"props":132,"children":133},{},[134],{"type":21,"value":135},"Three facts about reeds decide the whole shape of the app. They are worth two\nminutes now.",{"type":15,"tag":24,"props":137,"children":138},{},[139,145],{"type":15,"tag":140,"props":141,"children":142},"strong",{},[143],{"type":21,"value":144},"A beat is a difference, so it survives what moves both reeds together.",{"type":21,"value":146}," Press\nthe bellows harder and a reed's pitch falls, worst down low. But both reeds of a\npair fall together, so the beat between them barely moves. Absolute pitch has to\nbe measured at playing pressure. The tremolo is forgiving.",{"type":15,"tag":24,"props":148,"children":149},{},[150,155],{"type":15,"tag":140,"props":151,"children":152},{},[153],{"type":21,"value":154},"The ear hears beats far better than pitch.",{"type":21,"value":156}," A note has to be about 2 Hz out\nbefore anyone notices it in a melody. A change in beat rate of a tenth of a hertz\nis audible to a trained tuner. So the beat between two reeds must be held tighter\nthan either reed's own pitch: if both are three cents sharp, the tremolo is still\nperfect and nobody hears a thing.",{"type":15,"tag":24,"props":158,"children":159},{},[160,165],{"type":15,"tag":140,"props":161,"children":162},{},[163],{"type":21,"value":164},"A reed's pitch depends on the box it sits in.",{"type":21,"value":166}," Open the accordion and it\nchanges. Lift the reed block out and it changes again. Put everything back and it\nchanges back. The difference runs to about three cents, which is three times the\ntolerance a good technician works to.",{"type":15,"tag":24,"props":168,"children":169},{},[170],{"type":21,"value":171},"That last one is why the workflow below is shaped the way it is, and why you do\nnot file to zero on the bench.",{"type":15,"tag":16,"props":173,"children":175},{"id":174},"the-workflow-it-is-built-around",[176],{"type":21,"value":177},"The workflow it is built around",{"type":15,"tag":24,"props":179,"children":180},{},[181],{"type":21,"value":182},"A reed's pitch changes the moment you open the accordion and pull the block out,\nso you cannot measure, file, and measure again in one motion. The app is built\nfor the way the job is really done.",{"type":15,"tag":184,"props":185,"children":186},"ol",{},[187,198,208,218],{"type":15,"tag":188,"props":189,"children":190},"li",{},[191,196],{"type":15,"tag":140,"props":192,"children":193},{},[194],{"type":21,"value":195},"Record a pass, box closed.",{"type":21,"value":197}," With the instrument closed and playing\nnormally, record every note. That is a pass.",{"type":15,"tag":188,"props":199,"children":200},{},[201,206],{"type":15,"tag":140,"props":202,"children":203},{},[204],{"type":21,"value":205},"Read the errors.",{"type":21,"value":207}," For each reed the table shows its current pitch, its\ngoal, and the error between them, judged against your tolerance.",{"type":15,"tag":188,"props":209,"children":210},{},[211,216],{"type":15,"tag":140,"props":212,"children":213},{},[214],{"type":21,"value":215},"Open the box once, file by the numbers.",{"type":21,"value":217}," Open the accordion a single time\nand file each reed by its error. No guessing, no back and forth.",{"type":15,"tag":188,"props":219,"children":220},{},[221,226],{"type":15,"tag":140,"props":222,"children":223},{},[224],{"type":21,"value":225},"Record again and compare.",{"type":21,"value":227}," Close it, record a second pass, and lay it over\nthe first: what improved, what got worse, what is done.",{"type":15,"tag":16,"props":229,"children":231},{"id":230},"the-three-rooms",[232],{"type":21,"value":233},"The three rooms",{"type":15,"tag":24,"props":235,"children":236},{},[237],{"type":21,"value":238},"One window, three rooms, and a key each. Nothing scrolls.",{"type":15,"tag":240,"props":241,"children":242},"docs-screenshot",{},[],{"type":15,"tag":30,"props":244,"children":246},{"id":245},"tune",[247],{"type":21,"value":248},"Tune",{"type":15,"tag":24,"props":250,"children":251},{},[252],{"type":21,"value":253},"The microphone is open and the needle moves. Read it top to bottom: the input\ntrace and level, a note strip across the whole range (E0 to C9), the spectrum of\nthe detected tone beside a large note readout, the ruler with a needle per reed,\nand a value box per reed. Auto follows the played note; manual pins one so you\ncan work it.",{"type":15,"tag":24,"props":255,"children":256},{},[257],{"type":21,"value":258},"The toolbar carries start and stop, the source, auto or manual, the note and octave\nsteppers, freeze, note sounds, the register, the bellows direction, record and undo.",{"type":15,"tag":30,"props":260,"children":262},{"id":261},"workshop",[263],{"type":21,"value":264},"Workshop",{"type":15,"tag":24,"props":266,"children":267},{},[268],{"type":21,"value":269},"Sessions, instruments, and the cards you print. An instrument is described once\nand used for every session on it. A session is one job on one accordion.",{"type":15,"tag":30,"props":271,"children":273},{"id":272},"settings",[274],{"type":21,"value":275},"Settings",{"type":15,"tag":24,"props":277,"children":278},{},[279,281,286],{"type":21,"value":280},"The input device, the deviation unit, the naming, the behaviour of the reading, and\nthe look of the app. The reference pitch is ",{"type":15,"tag":140,"props":282,"children":283},{},[284],{"type":21,"value":285},"not",{"type":21,"value":287}," here: it belongs to the\ninstrument.",{"type":15,"tag":24,"props":289,"children":290},{},[291,296],{"type":15,"tag":140,"props":292,"children":293},{},[294],{"type":21,"value":295},"Leaving the Tune room stops the tuner, whichever door you leave by.",{"type":21,"value":297}," That is\ndeliberate: the engine holds the microphone open and runs a DSP pipeline twelve\ntimes a second, and none of that is doing anything for someone reading a table.\nIt costs one keypress to come back and it costs nothing else. Stopping the engine\ndoes not end an open pass and does not disarm recording, so pressing Start on the\nway back in goes on filling the same pass with nothing lost. Calibration is the\none exception: it is guided tuning, so the microphone stays live there.",{"type":15,"tag":16,"props":299,"children":301},{"id":300},"sources",[302],{"type":21,"value":303},"Sources",{"type":15,"tag":24,"props":305,"children":306},{},[307],{"type":21,"value":308},"Two: a microphone, or a WAV file. A loaded file behaves like a recording - a\ntransport in the header, a waveform you scrub and zoom, and a selection you drag\nover the steady middle of a note. The selection is the loop, and the range you\nselect is the range that gets measured.",{"type":15,"tag":16,"props":310,"children":312},{"id":311},"reading-the-tuner",[313],{"type":21,"value":314},"Reading the tuner",{"type":15,"tag":24,"props":316,"children":317},{},[318],{"type":21,"value":319},"Colour means something here, or it is not there. Three hues carry the reading, one\nmeaning each:",{"type":15,"tag":321,"props":322,"children":323},"docs-color-legend",{},[],{"type":15,"tag":24,"props":325,"children":326},{},[327],{"type":21,"value":328},"Beside them there is one blue accent, and it means \"here\" and \"do this\" - the\nbutton you press, the room you are in, a link. Nothing else on screen gets a\ncolour at all.",{"type":15,"tag":24,"props":330,"children":331},{},[332],{"type":21,"value":333},"Each value box is named for what it holds - Reed 1, Beat 1 to 2, Reed 2 - and\ncarries an error bar that grows out of the centre. The centre is the goal, so the\nbar is the error itself: left for flat, right for sharp, length for how far. Two\nnotches mark tolerance, four tolerances wide, so a reed in cents and a beat in\nhertz read the same way.",{"type":15,"tag":24,"props":335,"children":336},{},[337],{"type":21,"value":338},"The recorded table goes further and names its columns by rank (L, M1, M2), because\nthere the register that was pulled is known. On the tuner it is not, so the boxes\ncount instead of guessing.",{"title":6,"searchDepth":340,"depth":340,"links":341},2,[342,352,353,354,359,360],{"id":18,"depth":340,"text":22,"children":343},[344,346,347,348,349,350,351],{"id":32,"depth":345,"text":35},3,{"id":43,"depth":345,"text":46},{"id":54,"depth":345,"text":57},{"id":65,"depth":345,"text":68},{"id":76,"depth":345,"text":79},{"id":87,"depth":345,"text":90},{"id":116,"depth":345,"text":119},{"id":127,"depth":340,"text":130},{"id":174,"depth":340,"text":177},{"id":230,"depth":340,"text":233,"children":355},[356,357,358],{"id":245,"depth":345,"text":248},{"id":261,"depth":345,"text":264},{"id":272,"depth":345,"text":275},{"id":300,"depth":340,"text":303},{"id":311,"depth":340,"text":314},[362,365,368,371,375,379,383,387,391,393,397],{"slug":363,"nav":7,"order":8,"draft":364,"fallback":364},"index",false,{"slug":366,"nav":367,"order":340,"draft":364,"fallback":364},"getting-started","Getting started",{"slug":369,"nav":370,"order":345,"draft":364,"fallback":364},"tuning-guide","Tuning a whole instrument",{"slug":372,"nav":373,"order":374,"draft":364,"fallback":364},"instruments","Instruments",4,{"slug":376,"nav":377,"order":378,"draft":364,"fallback":364},"sessions","Sessions and passes",5,{"slug":380,"nav":381,"order":382,"draft":364,"fallback":364},"calibration","Calibration",6,{"slug":384,"nav":385,"order":386,"draft":364,"fallback":364},"beating-curves","Beating curves",7,{"slug":388,"nav":389,"order":390,"draft":364,"fallback":364},"reports","Tuning reports",8,{"slug":272,"nav":275,"order":392,"draft":364,"fallback":364},9,{"slug":394,"nav":395,"order":396,"draft":364,"fallback":364},"troubleshooting","Troubleshooting",10,{"slug":398,"nav":399,"order":400,"draft":364,"fallback":364},"faq","FAQ",11,1784488006306]