Sing free/What you need

Test your equipment

Establish that your computer can play this file:
One octave glissando starting at middle c

C

$\language "english" \relative c % EDIT BEGIN \transpose (\set \tempo) \transpose c c'' {\set Staff.midiInstrument = #"lead 2" \key c\major \time 4/4 \tempo "" 4 = 80 % EDIT END c,1 a,1 a,1 c,1 <a,c,> c,16 d, e, f, g, a, a,8 a,16 g, f, e, d, c, c,8 }$

D

$\language "english" \relative c\transpose c d'' {\set Staff.midiInstrument = #"lead 2" \key c\major \time 4/4 \tempo "" 4 = 80 c,1 a,1 a,1 c,1 <a,c,> c,16 d, e, f, g, a, a,8 a,16 g, f, e, d, c, c,8 }$

onlinemictest.com/tuners/pitch-detector
D E F^# G A B
D major

E

$\language "english" \relative c\transpose c e'' {\set Staff.midiInstrument = #"lead 2" \key c\major \time 4/4 \tempo "" 4 = 80 c,1 a,1 a,1 c,1 <a,c,> c,16 d, e, f, g, a, a,8 a,16 g, f, e, d, c, c,8 }$

onlinemictest.com/tuners/pitch-detector
A B C^# D E F^#
A major