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Re: [bug] Crescendi (still) lead to unaudible notes in MIDI files


From: Mats Bengtsson
Subject: Re: [bug] Crescendi (still) lead to unaudible notes in MIDI files
Date: Thu, 16 Sep 2004 19:09:06 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.2) Gecko/20040803

Yes, this is a long-standing bug, which occurs when you don't
specify any absolute dynamics before having a crescendo/diminuendo.
The problem is that LilyPond doesn't set any default volume to
start with. Actually, if you have a score without any dynamics
at all, the MIDI file will not contain any dynamics settings
either, so you get the default for the MIDI device you use.

   /Mats

Maurizio Tomasi wrote:
The following score causes Lilypond 2.3.11 to create a MIDI file where only the first note is audible (yes, the fourth C is gone too):

\score {
   \relative c' { c4 c-\< c-\! c }
   \midi { \tempo 4 = 120 }
}

If you remove the crescendo, the MIDI file is OK. Also, if you put a "-\f" after the last note, this become audible. I think Lilypond creates a MIDI file where all the notes but the first have zero velocity (volume).

Regards,
 Maurizio Tomasi.

Note: This bugreport was already sent some time ago (http://lists.gnu.org/archive/html/bug-lilypond/2004-08/msg00179.html),
but nobody confirmed if this is a Lily's bug or if there is something
wrong with my hardware (Debian Sarge Linux on an AMD PentumIII machine with Timidity).


--
=============================================
        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Sweden
        Phone: (+46) 8 790 8463                         
        Fax:   (+46) 8 790 7260
        Email: address@hidden
        WWW: http://www.s3.kth.se/~mabe
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