Found the following hamletworks.org entries referring to line 2230-1

View Commentary Note for 2228-31
2228-9 Ham. {It is} <'Tis> as easie as lying; gouerne these ventages |with your {fin-} 
2229-30 {gers, & the vmber} <finger and thumbe>, giue it breath with your | mouth, & it wil discourse 
2230-1 most {eloquent} <excellent> musique, | looke you, these are the stops. 2230 

View Material Textual Note for 2228-31
2228-9 Ham. {It is} <'Tis> as easie as lying; gouerne these ventages |with your {fin-} 
2229-30 {gers, & the vmber} <finger and thumbe>, giue it breath with your | mouth, & it wil discourse 
2230-1 most {eloquent} <excellent> musique, | looke you, these are the stops. 2230 

View Immaterial Textual Note for 2229-30
2229-30 {gers, & the vmber} <finger and thumbe>, giue it breath with your | mouth, & it wil discourse