What brand / model tuning pedal do you use and why?
I'm doing a lot of practice at home in E, but playing the same stuff live in drop D.
Tuning at home isn't a problem, I use my computer. Tuning at a gig is where my gear is lacking.
+1 for the Korg Pitchblack. It's not as pricey as some of the others mentioned and certainly does the job.
Ibby shredder Paul Gilbert seems to dig his:
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My D'Addario NS MicroTuner clip-ons are convenient and inexpensive... but they don't pick up the low B very well, which is what led me to the Pitchblack.