An organ loft asks for a seventh. Stack four pewter pipe-blocks into Maj7, 7, m7, or an inversion shown as 6/5 or 4/3. Pipes sound when you pick them up. A wrong Stack makes the pipes Cough. High-school harmony you build by hand, not a worksheet.
Read the lamp
Pick Easy, Medium, or Hard, then Stack. The lamp shows Maj7, 7, m7, 6/5, or 4/3. Tap Hear to arpeggiate the seventh.
Stack the pipes
Drag four pipe-blocks onto the loft rack, bass at the bottom. Easy and Medium label the notes. Hard leaves 6/5 and 4/3 unlabeled.
Press Stack
Stack checks the voicing. A hit is Lit! and adds Score, Streak, and Stacks. A miss is a Cough and costs a candle.
Clear 8 Stacks
Finish 8 Stacks for Console lit, or keep going until the candles go dark. Loft dark shows Score, Streak, and Stack again.
Stack four pipes
The console lamp asks for Maj7, 7, m7, 6/5, or 4/3. Drag pewter pipes onto the rack, bass at the bottom, then Stack.
Pipes that sound
Each block sounds when you pick it up. A right Stack lights the loft. A wrong voicing is a Cough and the pipes fall.
Score, Streak, Stacks
Eight Stacks light the console. Each Lit stack grows Score and Streak. Three candle lives.
Inversions on Hard
Easy is root-position Maj7 vs 7, labeled. Medium adds m7. Hard asks for 6/5 and 4/3 with unlabeled pipes.
Seventh Stack is a high-school harmony game in an organ loft. The player Stacks four pewter pipes into the seventh the lamp names: Maj7, 7, m7, or an inversion shown as 6/5 or 4/3. Easy is labeled root-position Maj7 vs 7. Medium adds m7. Hard uses unlabeled 6/5 and 4/3. Eight Stacks finish the run. It is a physical stack, not a four-button quiz.
Voicings you Stack
Students build Maj7, 7, and m7 from the bass, then 6/5 and 4/3. That is closer to writing a voicing than tapping a card.
Skill changes in the loft
Easy labels Maj7 vs 7. Medium adds m7. Hard hides the note names and asks for 6/5 or 4/3.
Lit or Cough
A hit lights the console and grows Score, Streak, and Stacks. A miss Coughs. The board and the how-to share Stack, Maj7, 7, m7, 6/5, and 4/3.
Hear the pipe
Blocks sound when picked up. Hear replays the seventh. Touch targets stay large on the rack.
Maj7 is a major seventh (major triad plus major seventh). 7 is a dominant seventh (major triad plus minor seventh). m7 is a minor seventh. Stack those four tones from the bass.
6/5 is a first-inversion seventh (third in the bass). 4/3 is a second-inversion seventh (fifth in the bass). Hard asks you to Stack those unlabeled.
Easy is root-position Maj7 vs 7 with note labels. Medium adds m7. Hard uses 6/5 and 4/3 with unlabeled pipes.
A Lit Stack starts at 140 and grows by 45 with Streak. Score, Streak, and Stacks sit on the candle plaques. Eight Stacks wins.
High-school music. Students who already spell Maj7, 7, and m7 and can Stack 6/5 and 4/3.