The only cantigas de amigo for which the music has survived.  13th/14th century.  In Galician-Portuguese.

A compilation of all seven songs in abc or pdf format.

The individual songs, in midi format:

• Ondas do mar de Vigo
• Mandad'ey comigo
• Mha irmana fremosa treydes comygo
• Ay Deus se sab'ora meu amado
• Quantas sabedes amar amigo
• En o sagrad' e Vigo (There is no music for this one.)
  
• Ay ondas que eu vin veer

Links: Wikipedia - Facsimile

Translations: English - Spanish - mine