Hi,

that was weird! I decided to change strings waiting
, hopefully, for replies.

Strings changed. Tuning back up.

I now noticed - for the first time- under the main TUNER note in small letters: A 430. HUH?

This is a cheap headstock tuner which works great
for relative tuning. but there are zero controls on it.

Anyway, I pulled the battery, reinserted. SMALL
letters now say A440. Phew.

So all seems well.

[I originally though biab could possible be set to
alternated A pitches and that was my problem?]

thanks