How do you tune a violin when you have no tuner present?

You would need a good ear. If you can get the G string from a piano or other instrument, you should be able to tune the others by listening for beats in the harmonics. The fifth plus one octave above the fundamental is a strong harmonic, so if you play the G and D string together, you would hear a beat if they’re not in tune with one another. Use the same method to tune the remaining strings.

Try this

@Foolaholic Where did you find that feature of Google?

@Aesthetic_Mess Someone right here

@Foolaholic It’s awesome! I’ve found a new why to annoy my sister

Phone a friend with either perfect pitch or a piano.

@Aesthetic_Mess

Hah! I also have a sister who is fun to annoy. Glad I could help.