Complex sentence: One difference between "fiddles" and ordinary violins may be seen in American (e.g., bluegrass and old-time music) fiddling: in these styles, the bridge is sometimes shaved down so that it is slightly less curved.
Split into simpler sentences: One difference between "fiddles" and ordinary violins may be seen in American (e.g., bluegrass and old-time music) fiddling. In these styles, the bridge is sometimes shaved down so that it is slightly less curved.