The bored twiddler kept spinning the pen between his fingers during the meeting.

The twiddlers in the audience couldn't help twirling their pens during the long lecture.

The knob-twiddlers in the studio spent hours perfecting the analog synth's warm tone.

The studio hired a seasoned knob twiddler to fine-tune the vintage amplifier before the session.

At the soundcheck, the knob twiddlers argued over who would tweak the EQ settings first.

When the old amplifier started humming, we called in a knob-twiddler to fine-tune its settings.