Use the drones off of the Fiddlerman.com website to work on intonation. This video will give you some tips about how to use them and listen for correct intonation. Use the drones not only for scales and etudes but also for pieces in the corresponding key signatures. Find this and many more useful tutorials on [ Ссылка ]
![](https://i.ytimg.com/vi/NS-nJhgXDxw/maxresdefault.jpg)