This tuning is the same as the Bass 4ths 8-string tuning except that the three highest strings are detuned a half step creating a major 3rd interval between the 3rd and 4th strings. This is similar to the Guitar Intervals tuning except that, with this tuning, strings 2-7 share the same letter names and are one octave lower than a standard tuned 6-string guitar.

1. A
2. E down a 4th
3. B down a 4th
4. G down a major 3rd
5. D down a 4th
6. A down a 4th
7. E down a 4th
8. B down a 4th

• Standard Bass 4ths
  
• Guitar Intervals
  
• Interior Matched Reciprocal
  
• Interior Classic
  
• Interior Dual Bass Reciprocal