grub: play
16.3.57 play
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-- Command: play file | tempo [pitch1 duration1] [pitch2 duration2] ...
Plays a tune
If the argument is a file name (⇒File name syntax), play the
tune recorded in it. The file format is first the tempo as an
unsigned 32bit little-endian number, then pairs of unsigned 16bit
little-endian numbers for pitch and duration pairs.
If the arguments are a series of numbers, play the inline tune.
The tempo is the base for all note durations. 60 gives a 1-second
base, 120 gives a half-second base, etc. Pitches are Hz. Set
pitch to 0 to produce a rest.
Info Catalog
grub: password_pbkdf2
grub: Command-line and menu entry commands
grub: probe