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| Acmlm's Board - I2 Archive - Programming - How do you extract "musical notes" from an MIDI track??? |
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eNathan Goomba Level: 8  Posts: 28/33 EXP: 1773 For next: 414 Since: 08-07-05 From: United States, but does it matter? Since last post: 1 day Last activity: 8 days |
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| Hey Acmlmer's. I basicly want to extract the musical notes from MIDI tracks. I have google'd all I can google with no luck. I am assuming there are two ways. 1. Write your own data type to handle the MIDI format (I dont know the structure of an MIDI, however). 2. Use a control (ActiveX, Component, whatever) to do it for you. However, I have not found any. I am using Delphi by the way. I can read VB and C++ tho, if anybody wants to post in those languages. ~eNathan 3.14 |
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Book Keeper ♫♫♫ n00blet ♫♫♫  Level: 21 Posts: 157/160 EXP: 49435 For next: 508 Since: 03-15-04 From: Wired Bookworm eat fresh! Since last post: 20 hours Last activity: 8 hours |
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| *bump* You'll be able to do that with finale notepad. |
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eNathan Goomba Level: 8 Posts: 29/33 EXP: 1773 For next: 414 Since: 08-07-05 From: United States, but does it matter? Since last post: 1 day Last activity: 8 days |
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Thanks for the link. I singed up to the site to download the control, and still have not recieved my password via Email  Lets get a little into the actaul format of an MIDI for a sec. If anybody knows the midi format, please reply to this as I am a little lost. Here are the MTHD and MTRK record's I have created based on this http://www.borg.com/~jglatt/tech/midifile.htm Type MTHD_CHUNK = Record ID: Array [1..4] of Char; Length: Integer;//4 byte Integer = Unsigned Long??? Format: ShortInt;//2 byte integer NumTracks: ShortInt; Division: ShortInt; End; Type MTRK_CHUNK = Record ID: Array [1..4] of Char; Length: Integer; Data: Char; End; There is only one problem with this, which should't really be a problem. The first 8 bytes of the MIDI file reads (in hex) 4D 54 68 64 00 00 00 06 The first 4 bytes of this (4D 54 68 64), when read as a 4 byte string, reads "MThd". The next four bytes (00 00 00 06), when read as a 4 byte integer should read 6! Because 00 00 00 06 = 6! However, Delphi is telling me that it equals 100663296. I am stuck on this problem. I have tried using all 4-byte data types (afak), and none of them equal 6. Any further help would be great. Edit :: I found out that the 4 bytes [00 00 00 06] were actaully in "reverse byte order", so I grabed this procedure to reverse the bytes again, yeilding the value of 6. procedure Swap32(var src, dest) ; asm mov ecx, dword ptr[eax] ; bswap ecx ; mov dword ptr[edx], ecx end ; But why in the word are the bytes reversed in the midi file? You are just going to have to reverse them back. Or is there something I dont know...? *Please move this to the programming section* (edited by eNathan on 10-25-05 01:48 AM) |
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