There's only one b7 chord. For example, if you're in the key of C, then the b7 chord is Bb. It'll never be anything else. If you're talking about the "kind" of chord, then you notate that to the right. For example, a b7sus or a b7m for minor or a b7+ for augmented.
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Hi, interesting stuff. But in the bridge you just wrote b7 - how would you know which b7 chord to play ?
There's only one b7 chord. For example, if you're in the key of C, then the b7 chord is Bb. It'll never be anything else. If you're talking about the "kind" of chord, then you notate that to the right. For example, a b7sus or a b7m for minor or a b7+ for augmented.