Expugna impugnantes me

Source: 
Aachen (Aix-la-Chapelle), Domarchiv, G 20
Folio: 
053v
Sequence: 
3
Feast: 
Fer. 2 per annum
Office/Mass: 
M
Genre: 
A
Position: 
1.5
Cantus ID: 
002801
Mode: 
1
Finalis: 
E
Differentia: 
A4
Differentia database: 
1--h-h-g-f-j-h--4 167a
Extra: 
042v
Indexing notes: 
differentia is Bflat-A; modal number assigned in MS=1.