Feature Request: Add "合奏用アコーディオン (SATB Ensemble Accordion)" to MuseScore Instrument List

• May 1, 2025 - 14:47

Hello MuseScore Team,

I would like to request the addition of a new instrument group for 合奏用アコーディオン (Gassouyou Accordion), a SATB-style ensemble accordion setup widely used in Japanese accordion orchestras and schools.

The ensemble organizes as:
- Soprano Accordion
- Alto Accordion
- Tenor Accordion
- Bass Accordion

🔗 Example Manufacturers

[Tombo Ensemble Accordions](https://www.tombo-mfg.co.jp/product_category/accordion/)
(and others such as Tokai Gakki)

🎵 Standard Ranges (written)

Instrument	Approx. Written Range	Clef (Default)	Sounds at
Soprano Accordion	C4 – G6	Treble	As written
Alto Accordion	F3 – C6	Treble	As written
Tenor Accordion	F3 – C6	Treble (default, 8va down)	Sounds one octave lower than written
Bass Accordion	F1 – C4	Bass	As written

🛠️ Staff Properties Example

Instrument	Clef (Default)	Transposition	Staff Lines	Special Notes
Soprano Accordion	Treble	None	5	-
Alto Accordion	Treble	None	5	-
Tenor Accordion	Treble (octave transposing)	Down 8va	5	Written one octave higher
Bass Accordion	Bass	None	5	-

Special:
- Tenor Accordion: By default, use Treble clef with automatic 8va-down playback, matching standard notation practice.
- Optional alternative: Allow manual selection of Bass Clef if a user prefers it without octave transposition.

### 📄 Proposed `instruments.xml` Entries (attached as a file)

🚀 Why this is important:

Ensemble accordions are common in Japan’s educational system and amateur orchestras.
Current MuseScore lacks ready-to-use SATB accordion support, requiring cumbersome manual adjustments.
Adding proper clefs and transpositions would mirror real-world practice, improving accuracy and accessibility for ensemble scores.

Thank you very much for considering this feature!