Amazon.com: VT-5 Violin Microphone Wireless UHF Gooseneck Pick Up Instrument Clip-on Mic Receiver and Transmitter System for Violin : Musical Instruments
Chromatic Violin Tuner App tune your violin using the microphone input - YouTube
Amazon.com: VT-5 Violin Microphone Wireless UHF Gooseneck Pick Up Instrument Clip-on Mic Receiver and Transmitter System for Violin : Musical Instruments
Free Online Violin Tuner with Mic and Tuning Notes - Violin Lounge