sound generation question
Daniel, Sofie and Beatrice
mcbracke at eircom.net
Sun Nov 26 16:28:28 UTC 2000
Thanks Dan. I'm looking at how this works now, so that I can maybe use it
as a basis to work from.
Can you please answer this:
looking at the 'buildKeyboard' method, I can see where the mouse down event
is picked up and handled using the
mouseDownEvent: event noteMorph: noteMorph pitch: midiKey
method. But I can't work out where the arguments come from. This is the
line in buildKeyboard
on: #mouseDown send: #mouseDownEvent:noteMorph:pitch: to: self
withValue:
i-1*12 + (#(1 3 5 6 8 10 12) at: j);
ands I can see that this calculates the midi note number corresponding to
the 'key' that has been pressed. But where do the arguments to
mouseDownEvent: and noteMorph: come from?
Thanks again
Daniel
At 09:19 22/11/00 -0800, you wrote:
> >How do I use the internal FM sound generator to play sounds without
> >predetermined duration?
> >
> >That is, something like:
> > aSound pitch: aPitch volume: aVolume play
> > aSound stop
> >
> >I had a look through AbstractSound, LoopedSampleSound and various other
> >classes but couldn't seem to find anything that has protocol something like
> >'start' and 'stop'.
> >
> >But as this is how MIDI works, I guess it must be possible?
>
>Daniel -
>
>Yes it is. You might want to look at PianoKeyboardMorph.
>It's a complete keyboard UI and synthesizer in 5 methods.
>
> - Dan
>
>[the ability to drag along the keyboard which works in 2.8 is currently
>broken in 2.9alpha, but I'll put out a fix soon]
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