[Csnd] Modification to John Ffitch's library for generation of fully integrable MIDI files
| Date | 2012-12-05 16:25 |
| From | Alfonso Peduto |
| Subject | [Csnd] Modification to John Ffitch's library for generation of fully integrable MIDI files |
| Hi everybody, my name is Alfonso and I am a new Csound-er based in Boston. I wanted to share with you a small instance of my my work which I think it might be of interested to anybody captivated in (broadly speaking) computer generated music.
In the "Audio Programming Book" (Richard Boulanger, ed, MIT press) in chapter 16 of the attached DVD, John Ffitch presents a wonderfully compact and efficient library for generating MIDI files. This opens up endless possibilities for algorithmic compositional processes.
Unfortunately, as presented, the library produces files which not integrable with any modern DAW: trying to import a MIDI file in, say, Logic, Finale, Digital Performer etc.. will prompt to different error messages.
I therefore use for my own work the following modification of the program, which enables fully integrable MIDI files. in "basic.c" line 140 reads
print_short_be(fout, 0xe728); replace such with print_short_be(fout, 0x1e0); This will change the time division of the MIDI file from milliseconds to the now standard pulse per quarter note (in this specific case 480).
Of course, now, as the general framework is slightly changed, when coding music one must keep in mind that a quarter note in this specification corresponds to 480, and work in accordance. Specifically when uses the function add_note(pitch, volume instr, when, lenght), both "when" and "lenght" now have to be given in PPQN.
This small change enables full integration with any major present day DAW like Logic, Pro Tools, Cubase, Digital Perfomer as well as Finale and Sibelius. Hope this might be helpful to somebody! Best, Alfonso Peduto President, Society of Composers Berklee College of Music |
| Date | 2012-12-05 17:53 |
| From | Rory Walsh |
| Subject | Re: [Csnd] Modification to John Ffitch's library for generation of |
> function add_note(pitch, volume instr, when, lenght), both "when" and > "lenght" now have to be given in PPQN. Or perhaps the function add_note() should take time values and then convert them to PPQN so the user doesn't have to think about PPQN at all. That might simplify things for the end users of the library. Maybe, I am not familiar with that particular chapter, but it's on my list of things to get through! |
| Date | 2012-12-05 18:36 |
| From | Alfonso Peduto |
| Subject | Re: [Csnd] Modification to John Ffitch's library for generation of |
| Yes indeed, that can also be implemented! In my own library modification I have defined global variables for quarter, eight, whole, eight triplets etc.. durations (in PPQN) so the user can think in terms of musical durations instead of milliseconds. -- Alfonso Peduto President, Society of Composers Berklee College of Music On Wed, Dec 5, 2012 at 12:53 PM, Rory Walsh <rorywalsh@ear.ie> wrote: > function add_note(pitch, volume instr, when, lenght), both "when" and |
| Date | 2013-03-03 03:21 |
| From | "Dr. Richard Boulanger" |
| Subject | Re: [Csnd] Modification to John Ffitch's library for generation of |
| Alfonso, Thanks so much for debugging this code and sharing it with all of us. dr.B.
Dr. Richard Boulanger, Ph.D. Professor of Electronic Production and Design Professional Writing and Music Technology Division Office @ 161 Mass Ave - 4th Floor 617-747-2485 (office) 774-488-9166 (cell) http://csounds.com/boulanger http://csounds.com/mathews http://boulangerlabs.com http://csoundforlive.com http://csounds.com On Wed, Dec 5, 2012 at 11:25 AM, Alfonso Peduto <apeduto@berklee.edu> wrote: Hi everybody, |