Organ Workshop Planner Pro v3.0 · offline

Design and document a wooden organ-pipe rank for the street organ or seasonal vending-machine project. Estimates are for prototyping, not production cutting.

Project name Project preset Reference note for prototype Notes (MIDI numbers, ranges or names, e.g. 53-72 or C4, Eb4, 60-64) Pipe type Width offset (semitones) Wind pressure (mm water) Flue slit (mm) Length allowance (mm) Notes sounding at once Blower allowance (%) Wall thickness (mm) Block + mouth length (mm) End correction × diameter (blank = auto) A4 (Hz) Speed of sound (m/s)

Workshop and enclosure assumptions

Usable enclosure height (mm) Usable enclosure width (mm) Spacing between pipes (mm) Wood cost (€/m², board thickness = wall thickness) Material waste (%) Valve cost each (€) Driver channel cost (€) Blower + regulator estimate (€) Electronics + wiring estimate (€) Miscellaneous + hardware (€)

Cabinet depth (mm) Top-zone width (mm) Top-zone height (mm) Side-zone width each (mm) Side-zone height (mm) Minimum clearance (mm) Board length available (mm) Board width available (mm) Extra hardware allowance (€)

Enclosure dimensions are usable internal space. Width check assumes one straight rank, side by side. Wood estimate covers four rectangular body panels per pipe only, not feet, mouths, stoppers, bellows, finish or cabinet.

Offline-first: files stay on your device. No cloud or account required.

Feasibility and budget

Envelope dimensions and costs are screening estimates, not verified installation drawings or supplier quotations. Pipes may be split across sides/top of the cabinet, but that requires a separate layout design.

Placement exploration

Greedy allocation to top, left side, right side, then a straight internal rank. Each zone is checked independently; this is a preliminary packaging study, not a collision-free 3D CAD layout. The cabinet depth and wind chest must still be checked mechanically.

Prototype build sheet

Select a representative pipe, record actual tuning, and use measured corrections for the next iteration. Measurement entries are not automatically applied to other notes.

Measured frequency (Hz) Measured effective body length (mm) Measured wind pressure (mm water) Workshop notes

A calibration record is tied to the selected MIDI note and the current acoustic configuration. Enter both measured frequency and effective resonator length; the suggested correction is experimental, not transferable without validation.

Fabrication package · drawings, assembly & inspection

Parametric 1:1 mm SVG and ASCII DXF R12 blank-panel drawings. Geometry is based on the simplified square butt-joint body, not a fully voiced organ pipe. Cut files exclude mouth/foot/stopper machining and are NOT released for cutting until the prototype and construction details are independently verified.

Drawing note Cutting tolerance ± (mm) Saw kerf (mm; for planning only) Joinery Drawing revision Material specification Actual board thickness (mm) Stopper seal compression allowance (mm) Stopper tuning travel (mm) Foot/wind inlet bore diameter (mm) Reference mouth opening height (mm)

Before cutting: validate resonator dimensions against a physical prototype; decide mouth/foot/stopper geometry, grain direction, glue-up sequence, tuning travel, stock thickness, and machine-specific tool compensation. Exported DXF is nominal geometry only, without kerf/tool offsets or CNC toolpaths.

Estimated body-panel material

Note	Side panels (2)	Front/back (2)	Panel area (m²)	Body width (outer mm)

Simplified butt-joint construction: two full-width panels and two panels fitted between them. All four use the estimated body-plus-allowance length. This is an illustrative material takeoff only; joint design, grain, feet, mouth openings, stopper, tuning travel, and saw kerf must be engineered separately.

Materials and procurement

Panel stock count is an area-only lower bound, not a nesting plan. Prices are editable assumptions, not supplier quotations. Verify grain direction, saw kerf, joint construction and actual board availability.

Arduino / MIDI valve map

MIDI note → sequential valve → 74HC595 logical register/bit. All numbering starts at 0. This is a software map, not a solenoid wiring schematic. 74HC595 outputs MUST drive appropriately rated MOSFET/driver stages, with flyback protection and a suitable separate supply.

MIDI note	Frequency	Valve	Register	Bit

Note	MIDI	Hz	Inside width mm	Outside width mm	Acoustic body mm	Body allowance mm	Cut-up mm	Flow L/s	Valve

Method: Töpfer Normalmensur (155.5 mm round diameter at 8′ C, halving every 17 semitones), converted to a square pipe of equal area. Estimated acoustic body length is λ/4 − 0.3·D for stopped pipes and λ/2 − 0.6·D for open pipes. Cut-up is one third of the width, as in the Bund Deutscher Orgelbaumeister wooden pipe plan. Flow is a theoretical estimate (slit area × jet speed × 0.8), not a verified blower specification. Wall thickness only estimates external square width; body allowance is not a complete woodworking cut list. Wind-chest losses, leakage, foot and mouth geometry, stopper construction and tuning travel are not modeled. Treat everything as a starting point and test-build one pipe first; the exact flue gap should come from a proper tool such as Krzyzaniak’s Organ Pipe Maker.