Overriding MIDI and a (possibly screwy) Idea

[Synthaholic AKA sPEW]

On Thu, 6 Feb 1997 17:59:37 +0100, you wrote:

>
>At 18:59 5/02/97 +0100, you wrote:

>Oh, how do you record a note that is pressed for, let's say 5 minutes
>(really stupid example....) then? I mean what kind of signal? 
>
Not stupid at all.  For now, assume 2 channels are being recorded, the
note pitch CV and a gate.

The gate is represented by one of two FSK tones, one for off and one
for on.  The pitch CV is represented by a varying tone depending on
the value of the CV.  You would run the gate and CV to both the
recorder and to the synth so that you could hear what you are
recording.  The CV would cause the recorder's VCO for that channel to
encode the CV as an AC sine wave with a pitch that changes relative to
the CV.  Note that the output frequency of the recorder's VCO will
likely NOT be the same as the VCO output of the synth.

On playback, the PLL recovers or decodes the recorded signal,
converting it back to it's (in this example, constant) level which is
then fed to the synth.  The same thing happens with the gate.  It is
decoded by the PLL for that channel and converted back to a DC gate
signal, also fed to the synth.


- Scott Gravenhorst (Synthaholic)     www.concentric.net/~chordman

Programming: The Ultimate Computer Game. | Windows 95: The Ultimate
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