Free Folk Backing Tracks with acoustic Guitar matching "Whistle " found:

1. Les Habits du Dimanche
   Folk backing track #207338
   acoustic Guitar: hartmut
   Whistle & harmonica: titi
   acoustic Guitar: FrankieJ
   

2. Les Habits du Dimanche Drums & Bass
   Folk backing track #207367
   acoustic Guitar: hartmut
   Whistle & harmonica: titi
   acoustic Guitar: FrankieJ
   Drums & Bass: Stamim2000
   

3. Whistle small bird / 2nd guitar
   Folk backing track #107712
   acoustic Guitar & acoustic Guitar: ARNOSOLO
   

   Meter: 4/4 
   Tempo: 90 BPM 
   Musical key: B  major 
   

4. Whistle small bird
   Folk backing track #107711
   acoustic Guitar: ARNOSOLO
   

   Meter: 4/4 
   Tempo: 90 BPM 
   Musical key: B  major 
   

5. Whistle Down The Wind.
   Folk backing track #133263
   acoustic Guitar, Flute & Vocals: donsk
   

   Tempo: 120 BPM 
   Musical key: C  major 
   

6. Freight Train Whistle
   Folk backing track #192146
   acoustic Guitar, Vocals & Drums: bluvation
   Bass: Carpenter
   

   Meter: 4/4 
   Tempo: 90 BPM 
   Musical key: C minor 
   

   Sounds like:Johnny Cash, Elvis, skiffle

7. Whistle Small Bird-bass add
   Folk backing track #195103
   acoustic Guitar: ARNOSOLO
   Bass: kmoon235
   

   Meter: 4/4 
   Tempo: 90 BPM 
   

   Sounds like:Folk

8. Whistle Little Bird 🐦
   Folk backing track #178472
   acoustic Guitar: ARNOSOLO
   Bass: Ernie440
   

   Meter: 4/4 
   Tempo: 90 BPM 
   Musical key: B  major 
   

   Sounds like:Folk music, acoustic guitar and bass

9. Tioraidh
   Folk backing track #58537
   acoustic Guitar: billybluej
   Vocals: Karliene
   Keys: P-Tar
   Flute: piper
   

   Sounds like:Piper, keys

10. I’m a travellin’ man ( flute add)
    Folk backing track #246039
    acoustic Guitar: hartmut
    Vocals: Zoot
    Cello & Flute: MikeyJ
    

    Meter: 4/4 
    Musical key: B minor 
    

    Sounds like:Zoot , whistle , wistful

11. To the Sea
    Folk backing track #212544
    acoustic Guitar: Balfo
    Wind synthesizer: Zoot
    

    Tempo: 138 BPM 
    Musical key: Db major 
    

    Sounds like:Irish whistle Sea Shanty folky ballad.