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This mini-project will develop your ability to interpret the binary file listing of a standard MIDI file. You will first parse the file into its component elements (headers, MIDI messages, meta-events, and delta-times), and then analyze your results.

Objective

MIDI files consist of three types of data: (1) MIDI events, (2) timing information, and (3) file structure information (file header and track headers). Your task in this mini-project is to parse a MIDI file by hand by examining the individual bytes of the file. Once you can successfully parse a file, you will be well-positioned to write your own software applications that can create standard MIDI files directly, or even to read the file directly (a challenge!).

If you have not done so already, please study the pre-requisite modules, MIDI Messages and Standard MIDI Files . You will need to refer to both of these modules in order to complete this activity.

Part 1: parse the file

The file to be parsed is available here: parse_me.mid (MIDI files are binary files, so right-click and choose “Save As” to download the file). If you wish, you can use a hexadecimal editor such as XVI32 to display the bytes, otherwise you can refer to the XVI32 screenshot below:

Hexadecimal listing of the 'parse_me.mid' file

The byte position (address) is shown on the far left panel, the hexadecimal representation of each byte in the file is shown in the central panel, and the ASCII representation of each byte is shown in the right panel. Most of the ASCII characters look like gibberish, but important landmarks such as the track chunk ID ( MTrk ) are easily visible.

Interpret each part of the file, and list your results in tabular format, like this (use hexadecimal notation for the “Starting Address” column):

Remember, a byte value of 0xFF signifies the beginning of a meta-event. Also, remember the concept of running status , so be on the lookout for MIDI messages whose first byte is NOT a status byte, i.e., whose MSB is clear. Take a look at the following video if you need some assistance:

[video] Walk through the MIDI file "parse_me.mid" at a high level, then show some parsing examples at the beginning of the file.

Part 2: analyze your results

Determine the following information for the MIDI file:

  • File format (Type 0, 1, or 2)
  • Number of tracks
  • Number of distinct channels used
  • Number of distinct voices (instruments) used (look for Program Change messages)
  • Number of ticks per quarter note
  • Shortest two non-zero delta times, reported both in ticks and in microseconds (hint: the timing information you need here is derived from information in two distinct places)
  • Top two longest delta times, both in ticks and in microseconds
  • Minimum non-zero note-on velocity, and its channel and note number
  • Maximum note-on velocity, and its channel and note number
  • Total number of meta-events

If you have not done so already, listen to parse_me.mid (click the link to launch your default music player application). How do your parsing and analysis results compare to what you hear?

Questions & Answers

who was the first nanotechnologist
Lizzy Reply
k
Veysel
technologist's thinker father is Richard Feynman but the literature first user scientist Nario Tagunichi.
Veysel
Norio Taniguchi
puvananathan
Interesting
Andr
I need help
Richard
anyone have book of Abdel Salam Hamdy Makhlouf book in pdf Fundamentals of Nanoparticles: Classifications, Synthesis
Naeem Reply
what happen with The nano material on The deep space.?
pedro Reply
It could change the whole space science.
puvananathan
the characteristics of nano materials can be studied by solving which equation?
sibaram Reply
plz answer fast
sibaram
synthesis of nano materials by chemical reaction taking place in aqueous solvents under high temperature and pressure is call?
sibaram
hydrothermal synthesis
ISHFAQ
how can chip be made from sand
Eke Reply
is this allso about nanoscale material
Almas
are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where is the latest information on a no technology how can I find it
William
currently
William
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
STM - Scanning Tunneling Microscope.
puvananathan
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Source:  OpenStax, Musical signal processing with labview -- midi for synthesis and algorithm control. OpenStax CNX. Nov 09, 2007 Download for free at http://cnx.org/content/col10487/1.2
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