Problem Statement

Output the 8 notes of the C major diatonic scale to the default musical sound device on the system. Specifically, pitch must be tuned to 12-tone equal temperament (12TET) with the modern standard A=440Hz. These are the notes "C, D, E, F, G, A, B, C(1 octave higher)", or "Do, Re, Mi, Fa, Sol, La, Si/Ti, Do(1 octave higher)" on Fixed do Solfège. For the purpose of this task, Middle C (in the case of the above tuning, around 261.63 Hz) should be used as the starting note, and any note duration is allowed. For languages that cannot utilize a sound device, it is permissible to output to a musical score sheet (or midi file), or the task can be omitted.

Let's start with the solution:

10 REM Musical scale
20 LET n=0: REM Start at middle C
30 LET d=0.2: REM Make each note 0.2 seconds in duration
40 FOR l=1 TO 8
50 BEEP d,n
60 READ i: REM Number of semitones to increment
70 LET n=n+i           
80 NEXT l
90 STOP
9000 DATA 2,2,1,2,2,2,1,2:REM WWHWWWH