RE: double-dotted 8th notes

Sorry, but its not 7/8 of a quarter-note...here is how I have it defined in
my MIDI building perl script...

$note{'s'}    = [ 10,  23, 24,  96   ]; # sixteenth
$note{'sde'}  = [ 10,  23, 24,  96   ]; # sixteenth after dotted eighth
$note{'e'}    = [ 20,  20, 48,  192  ]; # eighth
$note{'ed'}   = [ 30,  20, 72,  288  ]; # dotted eighth
$note{'q'}    = [ 40,  20, 96,  384  ]; # quarter

The 288 & 384 define the length of the note being played.

Here's the math:

1) divide eighth note by 2 (192/2=96)
2) add this value to length of eighth note (192+96=288)
3) you know have length of a dotted-eighth note: 288

Dotted means: "add 1/2 of a notes length to itself"

Here is a MIDI dump of a MIDI file that was created using these values.

                               time_signature 0000 0004 0002 0024
                               set_tempo  0000 600000 0000 0000
                               copyright_text_event 0000 0000 0000 0000
                               copyright_text_event 0000 0000 0000 0000
                               copyright_text_event 0000 0000 0000 0000
                               copyright_text_event 0000 0000 0000 0000
                               copyright_text_event 0000 0000 0000 0000
                               track_name 0000 0000 0000 0000
                               patch_change 0000 0009 0000 0000
                               control_change 0000 0009 0006 0100
Side Stick                     note_on    0000 0009 0037 0100
Side Stick                     note_off   0384 0009 0037 0000
Side Stick                     note_on    0000 0009 0037 0100
Side Stick                     note_off   0384 0009 0037 0000
Side Stick                     note_on    0000 0009 0037 0100
Side Stick                     note_off   0384 0009 0037 0000
Side Stick                     note_on    0000 0009 0037 0100
Side Stick                     note_off   0384 0009 0037 0000
Ride Cymbal 1                  note_on    0000 0009 0051 0071   <<<
dotted-eighth note
Ride Cymbal 1                  note_off   0000 0009 0051 0000   <<<
dotted-eighth note
Bass Drum 1                    note_on    0000 0009 0036 0093   <<<
dotted-eighth note
Bass Drum 1                    note_off   0288 0009 0036 0000   <<<
dotted-eighth note
Acoustic Snare                 note_on    0000 0009 0038 0094   <<<
sixteenth note
Acoustic Snare                 note_off   0096 0009 0038 0000   <<<
sixteenth note
Ride Cymbal 1                  note_on    0000 0009 0051 0076
Ride Cymbal 1                  note_off   0000 0009 0051 0000
Bass Drum 1                    note_on    0000 0009 0036 0090
Bass Drum 1                    note_off   0192 0009 0036 0000
Acoustic Snare                 note_on    0000 0009 0038 0086
Acoustic Snare                 note_off   0000 0009 0038 0000
Ride Cymbal 1                  note_on    0000 0009 0051 0075
Ride Cymbal 1                  note_off   0192 0009 0051 0000
Ride Cymbal 1                  note_on    0000 0009 0051 0072   <<<
dotted-eighth note
Ride Cymbal 1                  note_off   0000 0009 0051 0000   <<<
dotted-eighth note
Bass Drum 1                    note_on    0000 0009 0036 0093   <<<
dotted-eighth note
Bass Drum 1                    note_off   0288 0009 0036 0000   <<<
dotted-eighth note
Ride Cymbal 1                  note_on    0000 0009 0051 0077   <<<
sixteenth note
Ride Cymbal 1                  note_off   0096 0009 0051 0000   <<<
sixteenth note
Acoustic Snare                 note_on    0000 0009 0038 0090
Acoustic Snare                 note_off   0000 0009 0038 0000
Ride Cymbal 1                  note_on    0000 0009 0051 0075
Ride Cymbal 1                  note_off   0192 0009 0051 0000
Ride Cymbal 1                  note_on    0000 0009 0051 0073
Ride Cymbal 1                  note_off   0192 0009 0051 0000
Ride Cymbal 1                  note_on    0000 0009 0051 0078
Ride Cymbal 1                  note_off   0000 0009 0051 0000

To see and hear what this MIDI file looks like, see my drum lesson for
dotted-eighth notes here (its the 2nd lesson [graphic/midi] down on the
right-hand side of the page):

http://216.103.111.115/perl/drums/index.cgi?Action=OnlineLessons&Skill=Advan
ced&SubCategory=Dotted%20Eighth%20Notes&LessonID=Advanced2

Regards,
Scott


-----Original Message-----
From: Noel Lairson [mailto:[email protected]]
Sent: Monday, March 01, 2004 11:14 PM
To: [email protected]
Subject: Re: double-dotted 8th notes


double-dotted eighth note = 7/8 of a quarter note, so .875 or 84 ticks @ 96
tpqn.
Noel

On Mon, 01 Mar 2004 19:11:59 -0900, Sean M. Burke <[email protected]> wrote:

> I was just looking at MIDI/Simple.pm's %Length hash:
>
> 'wn' =>  4,     'dwn' => 6,    'ddwn' => 7,       'twn' => (8/3),
> 'hn' =>  2,     'dhn' => 3,    'ddhn' => 3.5,     'thn' => (4/3),
> 'qn' =>  1,     'dqn' => 1.5,  'ddqn' => 1.75,    'tqn' => (2/3),
> 'en' => .5,     'den' => .75,  'dden' => .75,     'ten' => (1/3),
> 'sn' => .25,    'dsn' => .375, 'ddsn' => .4375,   'tsn' => (1/6),
>
> and I've looked at this a million times before, but today I just happened
to notice: that says an 8th note is half a quarter note, and a dotted-8th is
.75 of a quarter note, AS IS a double-dotted 8th note?!  That can't be
right, can it?
> Shouldn't a double-dotted 8th note be... um... 7/8ths of a quarter note?
7/16ths?  Aaaaaaaa Rickeeeee music theory hurts my head waaaaaaa...
> --
> Sean M. Burke    http://search.cpan.org/~sburke/
>
>