Back to the "Youkaidi" song: It is definitely not by Carl Maria von Weber. A traditional students' corporation, quoting a printed songbook, attributes it to

tune: Richard Schäffer (1823-1886)
lyrics: Gustav Weber (1824-1908).

Carl Maria's songs were more sophisticated, some of them with guitar accompaniment, originally sung and played by himself.

Nevertheless, our song "Studio auf einer Reis" merits a more precise harmonization than Ingeb.org's MIDI offers us. Here is a version of my own making, reflecting my experience as a choirmaster, in ABC format. It can also be transposed down for male voices only, or up for females:

X:1
T:Studio auf einer Reis
C:Richard Schäffer (1823-1886), arr. Grishka
M:2/4
L:1/8
K:F
Q:1/4=100
%%score [Soprano Alto Tenor Bass]
V:Soprano
A> G F D | C D C2 | C B G2 | C A F2 |\
A> G F D | C D C2 | C B G E | F2 z2 |\
G A G A | G G G2 | G G A =B | c C C2 |\
C C F F | A A c2 | B C G2 | A C F2 |\
C C F F | A A c2 | B C G C | F2 z2 |]
V:Alto
F> A, B, B, | C =B, C2 | C E C2 | C F C2 |\
F> A, B, B, | C =B, C2 | C E C C | C2 z2 |\
D C D =B, | C C E2 | F =B, C D | E C C2 |\
C C A, A, | F F F C1/2D1/2 | E C C D1/2E1/2 | F C C2 |\
C C A, A, | F F F C1/2D1/2 | E C C C | C2 z2 |]
V:Tenor
C> ^C D B, | A, ^G, A,2 | G, G, B,2 | A, F, A,2 |\
C> ^C D B, | A, ^G, A,2 | G, G, G, B, | A,2 z2 |\
=B, A, B, D | C G, C2 | =B, A, G, F, | G, C (CB,) |\
A, A, C C | C C A,2 | C C B,2 | A, C A,2 |\
A, A, C C | C C A,2 | C C B, B,1/2C1/2 | A,2 z2 |]
V:Bass
F,> F, F, F, | F, F, F,2 | E, C, E,2 | F, C, F,2 |\
F,> F, F, F, | F, F, F,2 | E, C, E, G, | F,2 z2 |\
F, F, F, F, | E, E, E,2 | D, F, E, D, | C, B, (A,G,) |\
F, F, C, C, | F, F, C,2 | G, C E,2 | F, C F,2 |\
F, F, C, C, | F, F, C,2 | G, C E, G, | F,2 z2 |]