We use the (& & &) construct all the time. We use
ABC to capture vocal music for doing rehearsal tapes.
There are many places in vocal music where a single part
(such as the Bass part) splits into two voices (Baritone
and Bass) for a short time (such as two four bar phrases).
Without the (& & &) construct there are only two
ways to do this:
1) Create a separate voice for the Baritones that is a
complete copy of the Bass part except for the eight
different bars.
2) Use the & construct without the (& and have to do each
bar separately.
Option number 1 is a pain because typos in the score have
to be found in two different parts.
Option number 2 makes the phrasing harder to read. Here
is a three bar phrase done in the two ways:
% page 2 - line 2 - measure 4
[V:S] z4 z2 GF | G6 z G/2F/2 | GD DE/2D/2-D2 GF |
[V:A] x8 | x8 | x8 |
[V:T] z8 | z8 | z8 |
[V:B] z4 z2 GF & z4 z2 EA | G6 z G/2F/2 & E6 z E/2A/2 | GD DE/2D/2-D2 GF
& ED DE/2D/2-D2 EF |
% page 2 - line 2 - measure 4
[V:S] z4 z2 GF | G6 z G/2F/2 | GD DE/2D/2-D2 GF |
[V:A] x8 | x8 | x8 |
[V:T] z8 | z8 | z8 |
[V:B] (& z4 z2 GF | G6 z G/2F/2 | GD DE/2D/2-D2 GF && % Bass1
z4 z2 EA | E6 z E/2A/2 | ED DE/2D/2-D2 EF &) | % Bass2
I think that doing it with the (& construct is much
easier to read.
tom
Hudson Lacerda said:
> Phil Taylor wrote:
>
>>
>> On 10 Nov 2004, at 06:34, Remo D. wrote:
>>
>>> 3) overaly may occur on multiple measures
>>> G(&A | bc & d | F&)g --> d = A, F = b, g = c
>>
>>
>> No, I think the & operator sets the time back to the bar line, so this
>> should be A=G d=b (bar doesn't add up) and g=F.
>> Or have I got the wrong end of the stick?
>
>
> I don't saw the (& ... & ... &) construct in the standard, but only in
> the abcm2ps documentation files (features.txt and sample3.abc). The
> standard only describes the & operator.
>
> From the abcm2ps files, I could unterstand that the (& ... & ... &)
> construct is designed for *multiple bars* overlay. Please note that
> otherwise the tokens (& and &) were useless. However, in my opinion
> (consonant with Phil Taylor opinion), using (& ... & ... &) makes the
> source very difficult to read, and that's why I never used it.
>
> Regards.
>
> Hudson Lacerda
>
> P.S. In the file sample3.abc (from abcm2ps) there are some &&, but
> (using that program) they have the same effect of the simple &. I cannot
> understand it neither.
--
tom satter - or just plain old tom
(303) 543-7623 (home)
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