| 6 | El árbol de la noche triste- assistant sound engineer:
- Sonia Robles (from 2003-03 until 2003-06)
- sound engineer:
- Sergio Marcos (from 2003-03 until 2003-06)
- producer:
- Goyo Esteban (from 2003-03 until 2003-06)
- accordion, Hammond organ, piano and synthesizer:
- Sergio Cisneros "Kiskilla" (from 2003-03 until 2003-06)
- acoustic guitar and electric guitar:
- Carlitos (from 2003-03 until 2003-06) and Frank (from 2003-03 until 2003-06)
- bagpipe, transverse flute and whistle:
- Fernando Ponce de León (from 2003-03 until 2003-06)
- bass guitar:
- Sergio Martinez Rubio (from 2003-03 until 2003-06)
- drums (drum set) and percussion:
- Txus di Fellatio (from 2003-03 until 2003-06)
- electric violin, viola and violin:
- Mohamed (from 2003-03 until 2003-06)
- background vocals:
- Carlitos (from 2003-03 until 2003-06), Txus di Fellatio (from 2003-03 until 2003-06), Frank (from 2003-03 until 2003-06), José "le rumbier" (from 2003-03 until 2003-06) and Fernando Ponce de León (from 2003-03 until 2003-06)
- lead vocals:
- José "le rumbier" (from 2003-03 until 2003-06)
- phonographic copyright (℗) by:
- Locomotive Records S.L. (from 2003 to ????)
- recorded at:
- Estudios Eurosonic in Madrid, Comunidad de Madrid, Spain (from 2003-03 until 2003-06) and TRAK in Madrid, Comunidad de Madrid, Spain (from 2003-03 until 2003-06)
- mixed at:
- Studio du Manoir in Léon, Landes, Nouvelle-Aquitaine, France (in 2003-08)
- recording of:
- El árbol de la noche triste (from 2003-03 until 2003-06)
- lyricist:
- Txus di Fellatio
- composer:
- Carlitos , Txus di Fellatio, Frank , José "le rumbier", Sergio Martinez Rubio, Mohamed , Fernando Ponce de León and Sergio Cisneros
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