I'm working on a little MIDI VST plugin that will generate a real-time guitar/bass fretboard display of the notes being played. What makes it different from pretty much every other fretboard visualizer that I've seen is that it shows the notes played in all possible positions simultaneously, serving as an educational tool to learn how to play the same thing in multiple positions. The user can customize the number of strings on the instrument and the tuning. Hopefully some people will find it useful. I'm planning to use it for a series of guitar lesson videos on YouTube.
Here's a simple example of my VST in its current early alpha form. This is a test with a simple example MIDI file I cooked up:
It's working pretty well so far, so I decided to export some MIDI from BIAB to test it out. Unfortunately, all of the notes coming from BIAB end up being visually "stuck," i.e. there appears to be no Note Off event telling the notes to stop playing. You can see that here:
I analyzed the output of BIAB using a third-party MIDI logger and my suspicions were confirmed. BIAB does not appear to generate Note Off events when a note ends. Take a look at this image (messages beginning with a 0x93 are note-on messages on channel 4... note-off messages would start with 0x83, but they never appear):
Further inspection led me to use BIAB's built-in MIDI Monitor (found in the Window menu). It produces the same result:
There is a filter option in the MIDI Monitor and I double-checked it to make sure that Note Off events would be displayed:
So, it's pretty clear that BIAB does not generate Note Off events. I have a few questions about this.
1) First of all, aren't Note Off messages an essential part of the MIDI spec? Why are they not being generated by BIAB?
2) How does the software know when to stop playing a note if there is no Note Off message corresponding to the Note On message? As far as I'm aware, there isn't any duration information in a Note On message, so I don't see how that would work.
3) Is there an option hidden in one of the menus in BIAB where I can enable Note Off messages?
Any insight would be greatly appreciated. Currently, BIAB's output doesn't work with my VST, which is a little frustrating.
So, this is one of those cases where I hit the post button a little too soon. It looks like BIAB sends Note On events with a velocity of 0 to represent Note Off events. That's a little odd, but now that I know this, I can modify my plugin code to make a special case for when it receives a velocity=0 Note On event.
I was able to update the code and it's now working.
I'm still curious though, why no Note Off events are generated. Again, it just seems counter-intuitive since the MIDI Spec says that notes should end with a Note Off event. Any insight?
Loc: Melbourne, Australia
My understanding of the MIDI spec is that there are two ways that a Note-Off event is produced.
1: Note-Off can be produced by 0x80 (top bit set in high nibble of the Status Byte), 2: Also if the velocity is set to zero then the Note-On message is interpreted as a Note-Off message, therefore releasing the note (Note-off).
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Band-in-a-Box® 2019 for Mac Build 309 Update Available!
Band-in-a-Box® 2019 for Mac customers can download the latest FREE patch update here.
Summary of changes for Build 309: Fixed: The Chord Builder is disabled if previously opened before using a modal dialog (eg. Style Picker, Set Tempo). Fixed: The program might crash when selecting RealTracks in the Best RealTracks dialog (eg. #2541). Fixed: Wrong notes in Oohs and Aahs RealTracks. Improved: Higher dots-per-inch printing. Added: [Print Chords Only] button added to the Print Options dialog.
PowerTracks Pro Audio 2019 Build 2 Update Available!
PowerTracks Pro Audio 2019 users can download the FREE Build 2 patch update here
Summary of Changes in Build 2: Fixed: Sometimes the position of the VST/DX plugs window (even if not visible) would prevent a drop, such as into the drop station, from occurring. Fixed: When batch converting files, the volume of some file types such as wav/mp3/wma/mp4, etc. would be too low. Fixed: In Chords Window, you could not enter held chords on Piano track. Fixed: LeadSheet might not display tied notes on the last bar of a track. Fixed: Pressing "M" key in Editable Notation to insert a new note at the current time location on the Staff was inserting a duplicate note rather than inserting it above an existing note. Fixed: Loading in a MusicXML file could result in MIDI notes of zero instead of the currect MIDI notes. Fixed: Dragging a file into the tracks window didn't always result in the effects slot for the track being setup properly for the file type dragged in. Fixed: When inserting hard rest, and answering Yes to question about removing notes for the peg, it would remove notes from both clefs instead of the clef that the rest was inserted on. Fixed: Potential access violation when deleting a note in staff window. Fixed: Potential jukebox access violation if there were songs with the entire path of the filename being 256 characters or greater loaded into jukebox. Fixed: Jukebox not playing the playlist in correct order in certain situations involving stopping/restarting, etc. Fixed: When loading in a MusicXML file that has a specific guitar fretboard defined that matches one of our fretboards, the guitar tablature type will now be set for the notation. Fixed: Ability to load in .MXL (compresssed musicXML file) as well as ability to load normal noncompressed musicXML file with the new .musicxml extension instead of just .XML. Fixed: Hammer ons, pull offs, and slides are now being saved to MusicXML files. Fixed: Exceptionally jittery timing indicator in the notation window during playback compared to older versions of RealBand. Fixed: If the start of a generated section of a song didn't have a chord entered at the beginning of the section, then it could default to a C major chord instead of the most recent chord prior to the section. Fixed: Potential access violation if song has micro-pegs and multiple notes on a peg. Fixed: Accidental element that specified whether a note was displayed as sharp/flat wasn't eing saved to XML, even though the correct pitch of the note itself was saved.
All RealBand 2019 for Windows customers can download the latest FREE patch update (build 5) here.
Summary of Changes in Build 5 (Oct 10) Fixed: Sometimes the position of the VST/DX plugs window (even if not visible) would prevent a drop, such as into the drop station, from occurring. Fixed: When batch converting files, the volume of some file types such as wav/mp3/wma/mp4, etc. would be too low. Fixed: In Chords Window, you could not enter held chords on Piano track. Fixed: LeadSheet might not display tied notes on the last bar of a track. Fixed: Pressing "M" key in Editable Notation to insert a new note at the current time location on the Staff was inserting a duplicate note rather than inserting it above an existing note.
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-There is a keystroke entry mode, which lets you enter a melody entirely using keystrokes. The keystrokes are N to enter a note, M to enter a third note, up/down cursor to change the pitch of the highlighted note, and left/right cursor to move the time line.
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