The Hobby Crank Organ · Volume 8
The Hobby Crank Organ — Vol 08: Reference & Cheatsheet
This final volume consolidates the reference apparatus of the whole Hobby Crank Organ series into one place to keep at the bench: a note-count and scale comparison table for every small organ the dive spans, a first-build decision cheatsheet, a directory of the plans, books, software, and community that the series draws on, a materials-and-suppliers quick-list, a glossary of the crank-organ terms used throughout, a cross-index to Vols 01–07, and a de-duplicated bibliography. It introduces no new claims: every value here traces to the volume that first established it, cited in-row or in-paragraph as “(Vol N)”, and anything flagged (est.) in its origin volume keeps that flag here rather than being hardened into a specification. Where a figure appears in more than one volume, the number given is the one the series has carried consistently — the small-organ working pressure ≈ 5 in H₂O (127 mm ≈ 1.245 kPa ≈ 12.45 mbar) above all (Vol 03 §2.3; Wind Systems Vol 06; John Smith Universal Vol 04).
Note — reference, not procedure. Do not use a table row or a glossary line as the sole authority for building or setting anything. Follow the full treatment in the volume cited: the Höffle design in Vol 02, the build sequence in Vol 03, pipework in Vol 04, the music medium in Vol 05, the bigger builds in Vol 06, and the professional benchmark in Vol 07. Two identities the whole dive depends on are worth stating once more before the tables: note count ≠ pipe count (a register or a doubled bass puts more than one pipe on a note), and the 20-note scale is one scale with three trade names — Carl Frei = Raffin = Stüber (Vol 02 §2).
8.1 Note-count & scale comparison table
The dive spans small organs from 20 notes to the low 40s — the amateur range (Vol 01 §1). Below each is fixed by its scale (the roster of pitches and the track order that lets one organ’s music play on another), its typical register count, its usual music medium, and its chromatic completeness (how much of the twelve-note chromatic set it actually owns — a small gapped scale is diatonic-with-gaps, not chromatic). “Where covered” points to the volume that develops it.
Table 1 — 1. Note-count & scale comparison table
| Notes | Scale / origin | Typical registers | Music medium | Chromatic completeness | Where covered |
|---|---|---|---|---|---|
| 20 | Carl Frei (= Raffin / Stüber) — the de-facto European small busker/street standard | 4 (gedeckt · gedeckt vibrato (est.) · violin · piccolo) | cardboard book or paper roll; a MIDI-driven companion edition exists | Diatonic-plus-one: 8 pitch classes (C · D · E♭ · E · F · G · A · B♭) = F major + added E♭; no B♮, no F♯/C♯ (Vol 02 §2.1) | Vols 02–04 (Höffle); Vol 01 §3.1; John Smith Universal Vol 03 |
| 26 | Alderman | John Smith build: 4 stops (open flute · stopped flute · octave · slightly-sharp beating rank) | paper roll | wider than the 20-note gamut; full pitch table in John Smith Universal Vol 03 (est. here) | John Smith Universal Vol 03; Vol 01 §3.3 |
| 31 | Ulrich Stille plan (German designer) — not Höffle, not Brommer | 5 → 6 (foundation ranks + quint · piccolo · trumpet) | MIDI / solenoid (home-wound copper coils) | wider — more accidentals present, so arranging is less constrained than at 20 notes (est.) | Vol 06 §2; Vol 05 §8 |
| 38 | site author’s first crank/book organ; scale not stated on the source page (est.) | not stated on the page (est.) | cardboard folding book (not MIDI) | wider melodic range and fuller chords than 20 notes (est.) | Vol 06 §3 |
| 42 — “Little Mary” (Marietje) | 51-key Limonaire dance-organ scheme, percussion + register tracks removed → 42 note tracks | 3 melody registers (+ accompaniment + bass ranks) | hybrid: MIDI and paper roll | French Limonaire dance scale — fuller/brighter than a busker scale (est.) | Vol 06 §4 |
(Adjacent commercial formats the series names in passing but does not treat as builds: the 16-note Deleika and the 36-note roll formats the punching machine of Vol 05 §4 also cuts, and the 26-note scale as realised by the sibling John Smith Universal. The five rows above are the builds this dive develops.)
8.1.1 Note count is not pipe count
The single most repeated caution in the series (Vols 01, 03, 04, 06) is that a 20-note organ is not a 20-pipe organ. Registers multiply the count and the bass often doubles it. The consistent figures across the dive:
Table 2 — bass often doubles it. The consistent figures across the dive
| Notes | Approx. pipe count | How it is made up |
|---|---|---|
| 20 | ~70–80 pipes (est.; register splits per Vol 02) | four registers over 20 notes, less where a rank is short of full compass, plus any doubled bass |
| 31 | five→six ranks + two pipes per tone in the bass | doubled bass “for more body”; the added quint/piccolo/trumpet ranks (Vol 06 §2.1) |
| 42 | 86 pipes | 3 × 22 melody (mahogany) + 12 accompaniment + 8 bass; the lowest six bass pipes mounted under the chest with slanted beards (Vol 06 §4.1) |
The 42-note “Little Mary” is the sharpest illustration: 86 pipes on 42 notes (Vol 06 §4.1). Every wind and carpentry quantity in a scale-up tracks the pipe count, not the note count (Vol 06 §1).
8.2 Design decision cheatsheet
The first build’s four large choices, compacted from Vol 01 §6 and the scale-up guidance of Vol 06 §6. Read the “easier / lower-risk” column as the default first organ; each harder choice is a deliberate trade, not an upgrade.
Table 3 — 2. Design decision cheatsheet
| Decision axis | Easier / lower-risk first build | Harder / higher-reward | Trade in one line | Where covered |
|---|---|---|---|---|
| Note count | 20 notes (Höffle; John Smith 20) | 26 → 31 → 38 → 42 | more notes buy arranging freedom, but pipes/wind/width grow nonlinearly | Vols 02, 06; John Smith Vol 03 |
| Music medium | Cardboard book or paper roll (mechanical, self-contained) | MIDI / solenoids (boards, valves, wound coils, PSU) | MIDI never wears and edits perfectly, but adds electronics and exposes valve clatter the medium’s whir would hide | Vol 05; Encoding the Music (Dive 4) |
| Pipe wood | Shop-made wooden stopped flutes (fir/pine or beech) | violin (string) pipes, beech throughout, reed/trumpet ranks | stopped flutes are easy and buy bass in a short pipe; the violin pipe is the hardest to voice (frein) | Vol 04; How Organ Pipes Make Sound (Dive 2) |
| Registers | Four (gedeckt · gedeckt vibrato · violin · piccolo) | 5–6 (add quint, extra piccolo, trumpet) | each register is a rank + a slider + wind demand; more sound is often cheaper as a register than as more notes | Vols 02, 06 |
| Bellows material | Rubberised curtain cloth (John-Smith economy) | leather / sheep-hide bellows | leather lasts and seals; cloth is cheaper and lighter to start | Vol 03; Wind Systems Vol 06 |
| Wind pressure | ≈ 5 in H₂O (127 mm ≈ 1.245 kPa) — fixed, not a choice | (same across the whole small-organ range) | voice and tune every pipe at this pressure or it over-blows/goes dull on the organ’s own wind | Vol 04 §5; Wind Systems dive |
| Documentation | Full plan + construction reports + gallery (Höffle 20; John Smith) | sparsely documented one-off designs | a proven design means the failures are already answered in print | Vols 02–03; community (§3) |
| Precision parts | Buy finished (Höffle brass command block + pressure roller) | make them at home (beech command block) | the command block/roller tolerances are the hardest to hit; buy them, make everything else | Vol 03 §1.1; Vol 03 §4 |
Tip — the default first build. The lowest-risk, best-documented path is a 20-note, mechanical (book or roll), Carl Frei/Raffin-scale organ built from a complete plan — the Höffle 20-note or the John Smith 20-note. It finishes, it plays a real music library, and every subsystem is visible and mechanical. Scale up (Vol 06) or go MIDI (Vol 05) as a second project, once the first one plays (Vol 01 §6).
8.3 Plans, books, software & community directory
8.3.1 Plans and books
Table 4 — 3.1 Plans and books
| Item | What it is | Scope / format | Where |
|---|---|---|---|
| Walter Höffle 20-note book | The flagship amateur plan: a 20-key crank organ on the Carl Frei/Raffin scale, four registers | >60 pages + 8 beginner pages (building problems, alternative methods, tuning); Dutch / German / Spanish / English | Sold (not free) via hobbycrankorgan.com (en_hoeffle.htm) and by direct message |
| Höffle MIDI-driven 20-note book | Companion edition — how to build a MIDI-driven 20-note crank organ | English / Dutch / German; re-edited around modern components, added chapter on making the MIDI files | hobbycrankorgan.com (en_hoeffle.htm) |
| Ulrich Stille 31-note manual | The intermediate scale-up plan (5→6 registers, MIDI/solenoid, beech pipes, doubled bass) | 180+ pages, incl. a dedicated pipe-making chapter by Klaus Ospelt | via the community (en_31toets.htm; Stille listed on en_collegas.htm) |
| Höffle’s own five-register MIDI-organ book | Background, not the reference build: Höffle’s personal 20-key MIDI organ, five registers (stopped, stopped vibrato, wood piccolo, violin, quint) | German only | hobbycrankorgan.com (en_walterhoeffle.htm) |
8.3.2 Software
Table 5 — 3.2 Software
| Tool | Role | Key facts | Where |
|---|---|---|---|
| Midiboek10 | The hinge of the workflow — turns a MIDI arrangement into a printable book/roll template or a machine-cut file | Windows XP–10, .NET 2.0+, Adobe Reader; MIDI Format 0/1 in (built-in 1→0 converter); Gamma (scale) file maps MIDI note → track/hole geometry; outputs printable template, G-code, DXF; MIDI preview + summary (length in mm) | hobbycrankorgan.com (en_midiboek10.htm); Vol 05 §6 |
| Noteur | Free MIDI editor — the scanner’s output editor and the 31-note builder’s arranging tool | ”displays scan results visually with editable note tracks”; corrects mis-reads before commit | via en_scanner.htm, en_31toets.htm; Vol 05 §5, §8 |
| Gamma files | The scale definitions Midiboek10 consumes (20-note Carl Frei/Raffin, 31-note, etc.) | choosing the right Gamma file is what makes one MIDI arrangement print correctly for a given organ’s scale | Vol 05 §6 |
8.3.3 hobbycrankorgan.com / hobbydraaiorgel.nl page directory
The spine of the dive: one Dutch hobbyist’s accumulated method, in English
translation (English pages under hobbycrankorgan.com/subdir/en_*.htm; Dutch
original hobbydraaiorgel.nl). The key how-to pages, with a one-line description
each:
Table 6 — each
| English page | What it covers | Used in |
|---|---|---|
en_hfdpag.htm | English home / index — what the site offers | Vol 01 |
en_geschiedenis.htm | History of the site and builder (flute → 38-note book organ → the De Locht meetings) | Vol 01 §2 |
en_walterhoeffle.htm | Who Walter Höffle is; his own five-register MIDI organ | Vol 02 §1 |
en_hoeffle.htm | Plans: 20-key Höffle organ — scale, four registers, the book, the MIDI edition | Vols 02–04 |
en_hoefflefoto.htm | Photos of a built 20-key Höffle organ (gallery of ~50+ realised builds) | Vol 02 |
en_bouwhoeffle.htm | Construction report: 20-key Höffle (1) — an ~8-month build | Vol 03 |
en_20Hoffle2.htm | Construction report: 20-key Höffle (2) — bellows-first order | Vol 03 |
en_materiaal.htm | Material — finished command block, pressure roller, springs, consumables | Vols 03–04 |
en_pijp.htm | How to make an organ pipe — boards, mouth, stopper | Vol 04 §2 |
en_vioolpijp.htm | Intonation of the violin pipe — the frein/beard, voice-high-then-pull-down | Vol 04 §3 |
en_paprol.htm | How to make a simple paper roll (reel) | Vol 05 §3 |
en_ponsmachine.htm | A simple computer-driven punching machine (Arduino + steppers) | Vol 05 §4 |
en_scanner.htm | Cardboard-book scanner (IR read → MIDI file) | Vol 05 §5 |
en_midiboek10.htm | Midiboek10 software | Vol 05 §6 |
en_arrangementen.htm | Self-made arrangements (finished MIDI for 20/31/36/42-note organs) | Vol 05 §7 |
en_31toets.htm | The making of my 31-note organ (Ulrich Stille plan; MIDI/solenoid) | Vols 04, 05, 06 |
en_fotogal1.htm | Photos: making a 38-note cardboard-book organ | Vol 06 §3 |
en_marietje.htm | ”Little Mary,” the 42-note MIDI/roll hybrid | Vol 06 §4 |
en_onderdruk.htm | The underpressure (“de-airing”) note-action variant | Vol 06 §5 |
en_fotogal2.htm | Photo gallery of amateur builds worldwide | Vol 01 |
en_collegas.htm | Fellow hobbyists (Klaus Ospelt, Ian Dickinson, Ulrich Stille, others) | Vol 01 §4 |
en_links.htm | External resources (clubs, forums, plan publishers) | Vol 01 §4 |
en_downloads.htm | Downloads | — |
8.3.4 Community and the professional reference
Table 7 — 3.4 Community and the professional reference
| Resource | What it is |
|---|---|
Jäger & Brommer (jaegerbrommer.de, waldkircher-orgelbau.de) | The professional benchmark, not a hobby source — Waldkircher Orgelbau Jäger & Brommer, Waldkirch; church + street/barrel organs; the Karakuri organ. Profiled in Vol 07. Never the author of the hobby designs |
Melvyn Wright (melright.com/busker) | The John Smith busker-organ reference — bellows, springs, leak-curing, the pipe-voicing machine (the readily-available-materials tradition) |
| COAA — Carousel Organ Association of America | The English-speaking mechanical-organ community; its journal Carousel Organ carries the John Smith build articles cited across the program |
Busker Organ Forum (tapatalk.com/groups/buskerorgan) | Day-to-day Q&A on leather, glue, tuning, and mechanism |
| GDO — Gesellschaft der Orgelfreunde | German home-organ-builders / organ-friends association (via en_links.htm) |
| drehorgelbauen.de | German crank-organ builders’ forum (via en_links.htm) |
| Australian Mechanical Organ Society | Antipodean mechanical-organ community (via en_links.htm) |
Columbia Organ Leathers (columbiaorgan.com) | US supplier of organ leathers (bellows, pallets, pouches) — the go-to materials source when local hide is not to hand |
8.4 Materials & suppliers quick-list
The assembly-level shortlist, condensed from Vol 03 §4 (case, chest, drivetrain), Vol 04 (pipes), and Wind Systems Vol 06 (bellows leather, glue, springs). This is a pointer, not a cut list — dimensions and quantities are in the Höffle book and the volume cited. Where a material is treated in depth elsewhere, the row points there rather than repeating it.
Table 8 — 4. Materials & suppliers quick-list
| Item | Where used | Hobby-scale choice | Cross-ref |
|---|---|---|---|
| Case body | carcase, sides, lid | 12 mm birch plywood | Vol 03 §4 |
| Pedestal / trim | base, decorative faces | pinewood (grain figure) | Vol 03 §4 |
| Case bottom | transport-tough base | 12 mm concrete-multiplex | Vol 03 §4 |
| Pipe wood | four registers | beech (block/core + decorative front); Höffle’s plan uses fir; mahogany on “Little Mary” | Vol 04 §2.1 |
| Command block + pressure roller | reading + note valving | brass (buy finished) — or home-made beech | Vol 03 §1.1; en_materiaal.htm |
| Register slides | rank selection | 4 mm plexiglass on plexiglas dams, four clamp screws | Vol 03 §2.2 |
| Bellows leather | feeders, reservoir, hinges | ~1 mm leather; membrane < 0.5 mm | Wind Systems Vol 06; en_materiaal.htm |
| Fold stiffeners | bellows folds | 1.5 mm airplane plywood | Vol 03 §4 |
| Bellows spring | sets reservoir pressure | ~8 lb spring — tune on a manometer to 5 in H₂O | Wind Systems Vol 06; en_materiaal.htm |
| Pallet / valve leather | pallets, spill valve | scrap / “ragged” leather; soft plastic on MIDI valves (noise) | Vol 03 §4; Vol 06 §2.2 |
| Conveyance tube | chest → pipe foot | PVC hose (4 mm ID / 6 mm OD), cone-sharpened, press-fit | Vol 03 §4 |
| Reel body | take-up / supply reel | ~25 mm PVC tube, 111 mm wide (1 mm over 110 mm paper); 80 mm ply flanges; 20 mm beech register wheels | Vol 05 §3.1 |
| Drive cord | roll-drive transmission | 5 mm drive cord | Vol 03 §4; en_materiaal.htm |
| Fasteners | re-openable chest / housing | impact (tee) nuts + long screws, M6 hex | Vol 03 §4 |
| Glue | leather-to-wood, folds | hide or fish glue (flexing joints); PVA for rigid carcase only | Wind Systems Vol 06 §3.2 |
| Paper | punched roll | 100–140 mm strip (110 mm for 20-note); 3 mm holes, 5 mm heart distance | Vol 05 §3–4 |
| MIDI / solenoid parts | electronic note-action | home-wound copper solenoid coils (variable-speed winder); driver board; 12 V supply | Vol 05 §8; Vol 06 §2.2 |
| Punching-machine parts | roll cutting | Arduino Nano + A4988 drivers on a CNC shield, two steppers, drawer-slide rails | Vol 05 §4.2 |
| Book-scanner parts | book → MIDI | Kingbright L-934F3BT IR LEDs vs L-932P3C phototransistors; mkc64u USB reader (midiboutique.com, ≤64 tracks, ≈180 EUR); 12 V 7 A | Vol 05 §5 |
Glossary
Crank-organ terms used across the series, alphabetical, one line each. A definition is a reminder, not a substitute for the treatment in the volume cited.
Table 9 — 5. Glossary
| Term | Definition | Vol |
|---|---|---|
| Bauchorgel (belly organ) | A small organ slung on the body and cranked while walking; Jäger & Brommer build a 20-note example | Vol 07 |
| Beard | See frein: a plate (or roller) across a string-pipe mouth that holds it on its fundamental | Vol 04 §3.1 |
| Bauernmalerei | South-German / Black-Forest folk painting used to decorate the case | Vol 06 §2.3 |
| Book (cardboard, folding) | Zig-zag-folded perforated card read edge-first by a key frame; durable, editable, bulky | Vol 05 §1 |
| Command block (playing table) | The Höffle’s brass part that both reads the roll and admits wind to each note — reading + valving combined | Vol 03 §1, §2 |
| Cut-up | Height of the upper lip above the windway; the dominant voicing dimension (higher = rounder/weaker, lower = brighter → over-blows) | Vol 04 §5.2 |
| Drehorgel | German for a hand-cranked street/barrel organ | Vol 07 |
| Ears | Small flaps on the mouth’s vertical edges that steady speech and flatten the pipe slightly | Vol 04 §2.4 |
| Feeder | A one-way pumping bellows that raises wind into the reservoir | Vol 03 §1; Wind Systems Vol 02 |
| Flue pipe | A pipe sounded by an air-sheet across a mouth (no reed) — the stopped, open, violin, and piccolo pipes | Vol 04 §1 |
| Frein | French “brake”; a 0.5–1 mm brass/aluminium plate across a violin-pipe mouth (Gavioli’s fix) that stops it over-blowing the octave | Vol 04 §3.1 |
| Gamma file | Midiboek10’s scale definition — the map from MIDI note number to physical track and hole geometry | Vol 05 §6 |
| Gedeckt (stopped) pipe | A wooden pipe closed at the top; sounds ~an octave lower than an open pipe of the same length; the foundation register | Vol 04 §2.5 |
| Key frame | The reader for a cardboard book: one sprung key per note drops into a slot to open that note’s valve | Vol 05 §2 |
| Languid (block) | The solid plug filling a wooden pipe’s foot that, with the cap, forms the windway and lower lip | Vol 04 §2 |
| Limonaire scale | A French dance-organ scale; “Little Mary” derives its 42 notes from the 51-key Limonaire scheme | Vol 06 §4.1 |
| Melodica-tongue trumpet | A hobby reed rank made from harvested melodica free reeds (they speak at ~organ pressure) instead of scratch-built beating reeds | Vol 04 §4 |
| ÖK-Orgel-Konzept | Jäger & Brommer’s modular organ concept for smaller churches | Vol 07 |
| Onderdruk (underpressure / “de-airing”) | A note-action whose valve is opened by venting control pressure above a balanced membrane, not by admitting it — still a positive-wind pipe organ, not a suction reed | Vol 06 §5 |
| Open flute / piccolo | A wooden pipe open at the top; fuller/brighter than stopped, tuned by length | Vol 04 §2 |
| Pallet | The valve under a note that admits wind to its pipe when the medium calls it | Vol 03; Wind Systems Vol 01 |
| Pouch | A small leather diaphragm in a pneumatic action that lifts a pallet — the John Smith relay the Höffle command block replaces | Vol 03 §1.1 |
| Pressure roller | The Höffle’s brass roller that holds the paper roll flat against the command block’s reading face | Vol 03 §1.1 |
| Rank | One row of pipes, one per note a register covers, standing on the chest | Vol 02 §4.1 |
| Register | A selectable voice (a rank + its stop slider); the Höffle has four | Vol 02 §3 |
| Register slide | The sliding bar (hobby Schleife) that admits or blocks wind to a whole rank | Vol 03 §2.2 |
| Reservoir (magazine) | The sprung bellows that stores wind and holds it at a flat pressure | Vol 03 §1; Wind Systems Vol 03 |
| Roll (paper) | A punched paper strip on a reel, drawn across a tracker bar; compact, cheap, wears | Vol 05 §1, §3 |
| Spill (relief) valve | A sprung valve that dumps excess wind to cap the reservoir pressure | Vol 03 §4; Wind Systems Vol 03 §6 |
| Stopper | The sliding leather-faced plug that closes a gedeckt pipe and tunes it (in = sharp, out = flat) | Vol 04 §2.5, §6.1 |
| Tracker bar | The drilled bar reading a paper roll: one port per note; its pitch must equal the roll’s hole spacing | Vol 05 §2 |
| Undulating (vibrato) stop | A rank tuned slightly sharp that beats against a unison rank — the small organ’s substitute for a mechanical tremulant | Vol 02 §3.2, §4.2 |
| Windway (flue gap) | The slot between block and cap that shapes the air-sheet; set with a card shim | Vol 04 §2.3, §5.2 |
8.5 Series cross-index
8.5.1 What is in each volume
Table 10 — 6.1 What is in each volume
| Vol | Title | In one line |
|---|---|---|
| 01 | The Hobby Path | What a hobby crank organ is, why build one, the landscape of designs, the community, scales, choosing a first build, and the roadmap |
| 02 | The Höffle 20-Note Organ: Design & Scale | The flagship design — the 20-note Carl Frei/Raffin scale, the four registers and three pipe types, the book, why it is the reference first build |
| 03 | Anatomy & Build Sequence | The organ as a stack of subsystems and the order of assembly (following the two Höffle construction reports); the airtight gates; materials shortlist; build problems |
| 04 | Pipework the Hobby Way | Making wooden flue pipes, the gedeckt stopper, the violin pipe and its frein, the melodica-tongue trumpet; voicing and tuning at 5 in H₂O |
| 05 | The Music Medium | Book vs roll vs MIDI at hobby scale; making a paper roll; the punching machine; the book scanner; Midiboek10; self-arranging for 20 notes; the 31-note MIDI path |
| 06 | Bigger Builds & Variants | Scaling past 20 notes — the 31-note Stille build, the 38-note book organ, the 42-note “Little Mary” hybrid, and the underpressure variant |
| 07 | The Professional Benchmark: Jäger & Brommer | The Waldkirch tradition; the firm (founded 1988); the Drehorgel range (20-note belly organ → 31-note concert street organ); the Karakuri organ — the professional horizon, never a hobby source |
| 08 | Reference & Cheatsheet | (this volume) the comparison table, decision cheatsheet, directory, materials list, glossary, cross-index, bibliography |
8.5.2 How the dive sits in the Crank-Organs program
This dive is Dive 8 of the fifteen-dive Crank-Organs program (Track 2, “The Builds”). It sits on top of the Track-1 theory dives and beside the John Smith Universal build, converting general theory into the specific craft of the amateur pipe organ (Vol 01 §7). Where the theory lives:
Table 11 — amateur pipe organ (Vol 01 §7). Where the theory lives
| Foundation dive | Supplies | This dive applies it in |
|---|---|---|
| History of Mechanical Organs (Dive 1) | the lineage of barrel/book/roll organs the crank organ descends from | Vol 01 §2 (the amateur tradition) |
| How Organ Pipes Make Sound (Dive 2) | flue-pipe acoustics — jet, edge tone, why a stopped pipe drops an octave, why a narrow string pipe over-blows, reed vs flue | Vol 04 (pipework); Vol 02 (the voices) |
| Wind Systems (Dive 3) | the ≈ 5 in H₂O wind chain — feeders, reservoir, spring, spill valve, and how a slightly-sharp rank fakes a tremolo | Vol 03 (wind at assembly level); Vol 04 §5 (voicing pressure) |
| Encoding the Music (Dive 4) | the theory of barrels, books, rolls, and MIDI note messages | Vol 05 (the hobby workflow) |
| John Smith Universal (Dive 5, sibling build) | the parallel worked 20/26-note build — the 20-note Raffin and 26-note Alderman scales, the valved pressure box, the wind system, the drivetrain, and setup/voicing/tuning | cross-referenced throughout Vols 02–06 as the second concrete data point |
8.6 Bibliography / sources
Consolidated and de-duplicated from the sources sections of Vols 01–07.
- hobbycrankorgan.com / hobbydraaiorgel.nl — the amateur-builder community
site and the spine of the whole dive (English pages under
hobbycrankorgan.com/subdir/en_*.htm). The load-bearing pages:en_hoeffle.htmanden_walterhoeffle.htm(the Höffle 20-note plan and Höffle’s background);en_bouwhoeffle.htmanden_20Hoffle2.htm(the two construction reports);en_pijp.htmanden_vioolpijp.htm(pipe-making and violin-pipe intonation);en_paprol.htm,en_ponsmachine.htm,en_scanner.htm,en_midiboek10.htm,en_arrangementen.htm(the music-medium workflow);en_31toets.htm,en_fotogal1.htm,en_marietje.htm,en_onderdruk.htm(the bigger builds and variants);en_materiaal.htm(materials); anden_geschiedenis.htm,en_collegas.htm,en_links.htm(history and community). Full per-page use is tabulated in §3.3. - Walter Höffle — the 20-note building book (>60 + 8 pp.; Dutch/German/ Spanish/English) and its MIDI-driven companion edition; sold via the community site (Vols 02–04).
- Ulrich Stille — the 31-note plan and its 180+-page manual, including Klaus Ospelt’s dedicated pipe-making chapter (Vols 04, 06).
- Melvyn Wright, John Smith busker-organ pages (
melright.com/busker), including “Making a Pipe Voicing Machine” — the readily-available-materials tradition and the voicing jig (Vol 04 §5). - Carousel Organ Association of America (COAA) and its journal Carousel
Organ, and the Busker Organ Forum (
tapatalk.com/groups/buskerorgan) — the English-speaking mechanical/busker-organ community carried into the program’s Wind Systems and John Smith dives (Vol 01 §4). - Waldkircher Orgelbau Jäger & Brommer —
jaegerbrommer.de,waldkircher-orgelbau.de, andde.wikipedia.org“Waldkircher Orgelbau Jäger & Brommer” — the professional-benchmark sources for Vol 07 (firm founded 1988 by Wolfgang Brommer and Heinz Jäger; the Waldkirch tradition; the Karakuri organ). - Sibling program dives (cross-referenced, not re-derived) — How Organ Pipes Make Sound (flue-pipe acoustics), Wind Systems (the ≈ 5 in H₂O wind chain; 1 in H₂O = 249.089 Pa), Encoding the Music (barrel/book/roll/MIDI theory), and John Smith Universal (the sibling 20/26-note build, the Raffin and Alderman scales, and the concrete wind, chest, drivetrain, and voicing numbers).
Marked estimates / could not reconcile.
- Per-register pipe counts for the Höffle 20-note organ are not stated on the plan page; the ~70–80-pipe figure and the four-register mapping are (est.) (Vols 02, 04). Note count ≠ pipe count throughout.
- 38-note organ register count, pipe types, and dimensions are (est., unspecified) — the source page is a photo gallery, not a plan (Vol 06 §3).
- The onderdruk variant’s exact membrane/bypass geometry beyond the outline in Vol 06 §5 is (est.) — characterised from the page, not fully dimensioned.
8.6.1 Cross-references
- Vols 01–07 — the whole series this volume indexes; see §6.1 for the volume-by-volume map and §3.3 for the source-page directory.
- The Hobby Crank Organ, Vol 02 — Design & Scale — the 20-note Carl Frei/Raffin scale and four-register roster behind §1 and the glossary.
- The Hobby Crank Organ, Vol 06 — Bigger Builds & Variants — the 31/38/42-note builds and the underpressure variant behind the §1 comparison table.
- The Hobby Crank Organ, Vol 07 — The Professional Benchmark: Jäger & Brommer — the professional reference in §3.4; strictly separate from the hobby designs.
- John Smith Universal, Vol 03 — the authoritative 20-note Raffin (= Carl Frei/Stüber) pitch table and the 26-note Alderman scale referenced in §1.
- How Organ Pipes Make Sound (Dive 2), Wind Systems (Dive 3), Encoding the Music (Dive 4) — the Track-1 theory this dive sits atop (§6.2).
Sources
Consolidated in §7 above (the full de-duplicated bibliography for the series), with the per-page directory in §3.3 and the marked estimates in the closing callout.
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