To enter the onboard tuner on the Spark EDGE, simply power on the Spark EDGE and double tap the Preset Knob of CH1 to enter tuner mode.
While in tuner mode, the 3 Loopers LEDs will display if the string being played is in tune.
To exit tuner mode, press the Preset Knob of CH1 again.
The onboard tuner is a chromatic tuner. if you're unsure whether your instrument is noticeably out of tune, we suggest connecting the Spark EDGE to the Spark app (Tone Control) to check the note when tuning accurately.
You can also enter the tuner mode within the Spark app (Menu -> Tuner).