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Forums - Computer music & technology
Subject: Christmas gift ;-)
Original Message 1/13 26-Dec-02 @ 11:28 AM Edit: 26-Dec-02 | 11:29 AM - Christmas gift ;-)
Message 2/13 26-Dec-02 @ 02:25 PM - RE: Christmas gift ;-)
Message 3/13 26-Dec-02 @ 04:45 PM - RE: Christmas gift ;-)
Nope, it's just a basic synth with a phase mod. oscillator, plus some controls to mix between two signal shapers, and a filter. Phase modulation can be controlled by lfo, velocity and an adsr envelope generator and there is a knob to add a little delay between the left and right channels, to make it sound spacious.
And of course it could generate some "lethal frequencies" if you play it loud enough and twist the knobs in an unapropriate way...
Message 4/13 26-Dec-02 @ 05:08 PM - RE: Christmas gift ;-)
will let you know how i get on with it! cheers, m.
Message 5/13 26-Dec-02 @ 10:21 PM - RE: Christmas gift ;-)
___________________________________
I had an idea for a script once. It's basically Jaws except when the guys in the boat are going after Jaws, they look around and there's an even bigger Jaws. The guys have to team up with Jaws to get Bigger Jaws.... I call it... Big Jaws!!!
Message 6/13 28-Dec-02 @ 03:20 PM - RE: Christmas gift ;-)
Message 7/13 30-Dec-02 @ 03:57 PM - RE: Christmas gift ;-)
[image file]
Hi Milan,
Damn. I checked it again and it seems that what I used was called phase distortion synthesis, not phase modulation synthesis, sorry...
Anyway, some detailed information about phase distortion oscillators:
http://www.bluebear.org.uk/studio/cz101/cz_pd.html1
To my understanding the Phase Dist Osc mixes together 2 preselected waveforms (Wave 1 and Wave2) and morphs between the result and a pure sine wave according to the "Modulation Depth" parameter. (Which can be controlled by LFO and/or Envelope and/or Velocity in Harvester).
The wave shaper distorts the signal by a transfer function which is defined graphically. For a certain input level on the horizontal axis there is one certain output level on the vertical axis.
Acts like a table which tells for each input level, what is the output level.
(I tried to illustrate how it works on the picture with a setting that produce basic clipping distortion)
Message 8/13 09-Jan-03 @ 11:56 AM - RE: Christmas gift ;-)
BJT
Posts: 90
Link?: No link
File?: No file
Distorting the phase of a sine wave so it becomes a square wave....would be difficut...I think your thinking about harmonic distortion?
Distorting the phase of a signal doesn't change the sound much, especially if it is above 500Hz. I do reckon it does make a difference in the bass tho'.
If you distort the phase then mix it back into the original signal it becomes a filter system.
Message 9/13 09-Jan-03 @ 12:34 PM Edit: 09-Jan-03 | 12:38 PM - RE: Christmas gift ;-)
U(t) = Umax * SIN( alpha(t) ) where alpha increases in a linear way as time (t) goes.
My understanding is that if we modulate the alpha parameter then we can generate different waveforms with the same SIN function.
For example:
U(t) = Umax * SIN ( f(t) )
where f(t):
1 if alpha(t) < PI/2 + n*2PI
0 if alpha(t) > 3*PI/2 + n*2PI
n = 0,1,2,3.....
This should generate a square, but I haven't been into mathematics since... ehh, somehow I have the feeling that I wouldn't pass a math exam any more
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