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Why are we here?

St. Andrew’s Organ Committee Presentation 2 Organ Design Types and Our Current Organ: Sight and Sound. Why are we here?. Essential components of the pipe organ Different design types: advantages and disadvantages Optimal pipe organ sound, design, placement, and acoustics. Organ Components.

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Why are we here?

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  1. St. Andrew’s Organ Committee Presentation 2Organ Design Types and Our Current Organ: Sight and Sound

  2. Why are we here? • Essential components of the pipe organ • Different design types: advantages and disadvantages • Optimal pipe organ sound, design, placement, and acoustics

  3. Organ Components • Pipes • Wind system • Keyboards • Action

  4. Wind System Must deliver large volumes of compressed air at constant pressure regardless of demand.

  5. Bellows maintain air at constant pressure St. Andrew’s Organ Bellows

  6. Blower should quietly furnish lots of air on demand. St. Andrew’s Organ Blower and wind trunk ducting

  7. Wind trunk delivers air to the wind chest, which feeds air to the pipes.

  8. The Action: Links console to wind chest, determining which pipes receive air. Action Types: • Mechanical • Direct electric • Electro-pneumatic

  9. Mechanical (Tracker) Action

  10. Keys, Stops & Sliders 3. The stop (opened or closed by the organist) admits air from the groove to a rank of pipes 2. The pallet admits air to the tone channel or groove 1. The key (played by the organist) opens a pallet

  11. Direct Electric Action • Lots of force needed to open valve against the pressure of compressed air. • Requires a large solenoid and high current or high voltage with attendant issues of durability.

  12. Electro-pneumatic Action Uses compressed air to develop the force to open the valve in response to a weak electrical signal. PIPE PIPE

  13. Electro-pneumatic Action

  14. Electrical Actions • Insensitive to touch and unresponsive to wind. • Sound quality degraded by organ divisions in different locations. • Obsolescence of mass-produced components. • Failure of small leather pouches.

  15. Tracker Action • Touch-sensitive two–way communication between fingers and pipes. • Pipes and console together improves sound quality. • Stable technology. Easy maintenance. Lifetime of centuries. • No mass-produced components. • No leather pouches.

  16. Pipe Organ Sounds – The Good and the Bad • Cardinal or Crow? • Ten Piccolos • The Overwhelmed Soloist • Where is e flat? - Broken Parts • The Monster in the Room

  17. Cardinal or Crow Clear Muddy Colorful One Dimensional Transparent Opaque

  18. The Ten Piccolo Problem Treble – Bright Notes Treble – Bright Notes Bass - Fundamentals Bass - Fundamentals

  19. The Overwhelmed Soloist

  20. Broken Parts: Where’s e flat? e

  21. The Monster in the Room

  22. Problematic Organ Design, Placement, & Acoustics • No Case = No Coherent Sound • Free- Standing Pipes = No Blend • Location, Location, Location, Location, Location • Broken 8-Track: Obsolescent Technology & Mediocre Materials • Chancel Eats Sound

  23. Optimal Organ Design, Placement, and Acoustics • Choir and Organ – One Voice • High & Long – A voice from Heaven • Case Provides a Home for Organ • Reflective surfaces – All Things Bright and Beautiful • Enduring Materials and Time Tested Technology

  24. Questions and Discussion • Thanks for your time and consideration!

  25. Our next meetings will present our concept for organ replacement.We look forward to a great discussion to help us set a path forward!

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