maybe that is what you are getting at and I misunderstood you. a guitar player needs both hands perfectly coordinated together. this is like saying that a guitar player needs his picking hand more than his fretting hand. Didn't search very deep, but if you analyse this video, you see the "backward and forwardness" of the source sound is not really the main feature. Of course other techniques you might be better off with a sampler of sorts, or sometimes some (complex) oscillator sounds work too instead of noise. throw a slewed sample and hold or modulated envelope over the pitch and you're most of the way there.
#DJ RECORD SCRATCH SOUND EFFECT YOUTUBE MANUAL#
without an actual crossfader, you can get pretty close with a trigger sequencer (or manual trigger/gate) opening up a vca over some pitched noise. the stereotype is usually focussed on moving the record back and forth, but for a lot of techniques, the other hand is actually the more important. But since you are using 2Hz LFO this is a bit tricky.ĭepends what you mean by "scratch sounds". TL DR remove the DC offset from your modulation.
But you can look at it intuitively without any knowledge of derivatives as well. This works because the derivative of sinX is -cosX. The maximum position is also the time when it stops moving (speed = 0). When the pendulum is at its maximum swing to one side it stops and changes direction. When a pendulum swings through zero the position is zero but also the pendulum has also simultaneously reached max speed. If you use sine waves for position on a graphing calculator, all the rest will be sine waves as well. You can go up and down in complexity with basic math. Position, velocity (speed), acceleration, jerk are all related by derivatives and integrals. This is getting closer and closer to how a dj moves the record hand. If you keep going you get almost square wave modulation. Run that through a tri to sin shaper like instruo tanH. You get regular playback forward and reverse. Modulate playback speed with a triangle LFO 2Hz. You find the DLL and start reverse engineering from that.
#DJ RECORD SCRATCH SOUND EFFECT YOUTUBE WINDOWS#
Then you would need to hook into that data with some kind of windows app or python script. Since you can not use the phonograph utility record at the same time as a timecode vinyl, you would need to buy these wireless turntable sensors that they sell. But you would need an auxiliary way of direction and speed tracking. A detailed study of this from a scientific point of view is possible. There is something called the phonograph utility record. You can buy white noise, pink noise, tone sweeps etc.
At the same time, there was never any ultra low frequency sounds on the record that would be in the mid bass when everything is being shifted up. High speed increases volume and decreases high frequency response of the recording while it is being pushed up out of the range of the bandwidth of the needle. Similar attempts have been done prior to this with various academic noise musicians like John cage for example.Īnyway if you really want to reproduce that sound, you need to simulate the amplitude and bandwidth changes that happen when the record travels at different speeds with respect to the needle.
That way someone like you can attempt to reproduce a composed scratch performance by following the movements following rules etc. DJ yoga frog invented something like sheet music notation for scratch DJ's. I can tell you that there is an acceleration curve generated by the hand of a well trained DJ that is damn near perfect approximation of some logarithm or something.
I went up against DJ Perseus who went on to win everything. Many years ago I competed in round one of scratch competitions.
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