Out of each twelve frequencies on a single string, you can make many selections of either five frequencies (for the pentatonic scales) or seven frequencies (for the heptatonic scales).
aʊ t ə v WORD_BOUNDARY iː t̠ʃ WORD_BOUNDARY t w ɛ l v WORD_BOUNDARY f ɹ iː k w ə n s i z WORD_BOUNDARY ɔ n WORD_BOUNDARY ʌ WORD_BOUNDARY s ɪ ŋ ɡ ə l WORD_BOUNDARY s t ɹ ɪ ŋ WORD_BOUNDARY j uː WORD_BOUNDARY k æ n WORD_BOUNDARY m eɪ k WORD_BOUNDARY m ɛ n i WORD_BOUNDARY s ɪ l ɛ k ʃ ə n z WORD_BOUNDARY ʌ v WORD_BOUNDARY iː ð ə ɹ WORD_BOUNDARY f aɪ v WORD_BOUNDARY f ɹ iː k w ə n s i z WORD_BOUNDARY f ə ɹ ð ə WORD_BOUNDARY p ɛ n t ʌ t ɑ n ɪ k WORD_BOUNDARY s k eɪ l z WORD_BOUNDARY ɔ ɹ WORD_BOUNDARY s ɛ v ə n WORD_BOUNDARY f ɹ iː k w ə n s i z WORD_BOUNDARY f ə ɹ ð ə WORD_BOUNDARY h ɛ p t ʌ t ɑ n ɪ k WORD_BOUNDARY s k eɪ l z WORD_BOUNDARY