On Aug 13, 2004, at 4:07 PM, K Norris wrote:
What about MIDI tools, specifically, can we play notes live through an onscreen keyboard with no latency.
To get an idea of what I mean, for Mac folks who are on the SuperCard list
(Yahoo! groups), go to the files area Miscellaneous folder and D/L my latest
post there named 'Instrument2', and checkout how the keyboard works.
By permission of the owner (Jon Adams), it uses Nigel Redmond's QuickNotes
external. Would it work with Rev? How could it be implemented
cross-platform (the thing I'm interested in for these experiments)? I
wouldn't have a clue how to transform it into a Windows-useable DLL.
As you indicate, the cross-platform issue is the challenge. For the stack MIDI Builder, I use an invisible QT player set to a temporary MIDI file for each piano key clicked. This enables cross-platform functionality but does involve a latency due to the overhead of initializing a MIDI file for each heard note. As it stands, each separate note's MIDI file is created on-the-fly. This enables the current MIDI track's selected MIDI instrument to be heard exactly as it will be recorded to the MIDI file. This system would of course be inappropriate for real-time data entry; it works only in step-entry mode. I personally am not familiar with the hooks to the "MIDI-playing" parts of the OS, Mac or Windows. In the case of MIDI Builder, QT handles it for me.
In reference to your question above, I'm guessing that you would have to have an external that would interact with QT for Windows, or alternately one that might work through the underlying mechanism used by the Windows Media Player to play MIDI files.
-Kurt =====================
We'll be the country's toast And rule from coast to coast, Without legality but that's just a technicality!
Ira Gershwin, "Let 'em Eat Cake", 1933
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