KORG Pitchblack Plus Owner's Manual

To calibrate the tuner, press the 'Calibration' button repeatedly until you reach the desired concert pitch. The display will show the calibration setting, which ranges from 436 to 445 Hz.
Check the power source: ensure the power adapter is correctly plugged in or, if using batteries, check if they are inserted correctly and have sufficient charge.
Yes, the Pitchblack Plus Tuner can be used to tune a 7-string guitar. Use the 'Flat Tuning' mode to accommodate the lower string if necessary.
To switch between True Bypass and Buffered Bypass, turn off the tuner and hold down the foot switch while turning it back on. The display will indicate the current mode.
'Flat Tuning' allows you to tune your instrument down by one to five semitones. This is useful for guitarists who play in alternate tunings.
Keep the tuner in a dry, dust-free environment. Avoid exposing it to extreme temperatures, and periodically check the calibration settings to ensure accurate tuning.
Flickering may be due to a low battery. Replace the batteries or use an AC adapter. If the problem persists, check for loose connections or contact KORG support.
Plug your bass guitar into the input jack and play a string. The display will show the note being played. Adjust the tuning pegs until the note is in tune according to the display.
Use a soft, dry cloth to clean the exterior. Avoid using water or cleaning solvents, as these can damage the device.
Ensure all cables are securely connected and functioning. Check the input jack for any debris or obstruction that may affect the signal.