Re: Tried to use "music box" with Lilypond 2.22.2, get lots of Scheme errors

[Aaron Hill]

On 2022-09-20 4:27 pm, Kenneth Wolcott wrote:
> Hi;
>
> Tried to use "music box" with Lilypond 2.22.2, get lots of Scheme 
> errors.
>
> https://lsr.di.unimi.it/LSR/Search?q=music+box
>
> See attachments. I did not include my generated pdf file because it
> pertains to the input file prior to trying to implement the music box.
>
> Thanks,
> Ken Wolcott
>
> ~/bin/engrave.pl --lpv=2.22.2 --s=O_Holy_Night.ly
> GNU LilyPond 2.22.2 (running Guile 2.2)
> Processing `O_Holy_Night.ly'
> Parsing...Backtrace:
> [...]
> ice-9/eval.scm:159:9: Value out of range 0 to 18446744073709551615: -14

Review the documentation for LSR 346.  The transformation pattern must 
use notes starting from middle C.  Your pattern has notes in a much 
lower octave, which results in a negative index.  So, you would want to 
say something like this:

%%%%
make_bass_pattern = \defineTransform \tuplet 6/4 \fixed c' { c8( d e f g 
a) }
%%%%

However, you can do this more efficiently, removing the redundant notes:

%%%%
make_bass_pattern = \defineTransform \tuplet 6/4 \fixed c' { c8( d e f d 
e) } % 1 2 3 4 2 3
% ...
| \make_bass_pattern { g, g d b } \make_bass_pattern { b, g d b }
| \make_bass_pattern { b, g d b } \make_bass_pattern { b, g d b }
| \make_bass_pattern { b, g d b } \make_bass_pattern { c g e c' }
% ...
%%%%


-- Aaron Hill