Jason Alder

- Two Selmer Contra-Altos
- Contradictions: Duets for Contrabass and Contra-Alto Clarinets · 2019
- Selmer Contra-Alto and Contrabass
- Contradictions: Duets for Contrabass and Contra-Alto Clarinets · 2019
- Two Paperclip Contrabasses
- Contradictions: Duets for Contrabass and Contra-Alto Clarinets · 2019
- Paperclip and Selmer Contrabasses
- Contradictions: Duets for Contrabass and Contra-Alto Clarinets · 2019
- Selmer Contrabass and Contra-Alto
- Contradictions: Duets for Contrabass and Contra-Alto Clarinets · 2019
- Paperclip Contrabass and Selmer Contra-Alto 1
- Contradictions: Duets for Contrabass and Contra-Alto Clarinets · 2019
- Paperclip Contrabass and Selmer Contra-Alto 2
- Contradictions: Duets for Contrabass and Contra-Alto Clarinets · 2019