The most complex piece of the Final Scratch setup is the code pressed onto the vinyl. A hertz amplitude modulated sine wave is pressed into the left and right channels with a phase difference of 90 degrees. Each channel holds one of the two bit streams required for the time code. In one cycle of either wave form, two bits are stored: one on the positive voltage peak and one on the negative voltage valley.
The relative amplitudes of these peaks represent either a binary one or zero. A relatively high amplitude on either peak represents a one, a relatively low amplitude represents a zero. In each channel is a separate bitstream, the left channel is not identical to the right disregarding the phase difference. The time codes themselves consist of 40 individual bits, or 20 cycles on each channel's waveform.
On the right channel the bit sequence of 0, 0, 0, 1 represents the start sequence for a single time code. Those four bits along with the four corresponding bits on the left channel and the next 16 bits on each channel can be decoded as an integer position value which represents where the needle is on the record.
The speed at which the record is spinning can be found by comparing the frequency of the waveform being read from the record to the true frequency of the wave form on the record at normal speed. This difference represents the change from the normal speed at which the record turns. The direction which the record is spinning at any given time can be found using the phase difference between the waves on the two channels. This procedure is the same as that used to determine the direction in which a ball mouse is moving.
Because a single time code is made up of 40 consecutive bits, read errors can cause a timecode to be unreadable even if a single bit is misread. A bit that has become unreadable due to a scratch can make an entire 40 bit long time code permanently unreadable. Dust can have a similar effect on the time code. The time code implements very little error checking, an attribute strong in a number of other vinyl control systems.
Werde, Bill October 25, , 'The D. Search for:. The use of CD deck features software permitting such as keylock, pitch shift, looping, instant cue locating and visual indicators of audio features such as loud or quiet parts. Versions 1. Version 2 [ edit ] Version 2 marks the introduction of both a new Scratchamp hardware device and different software compatibility. As an existing ScratchAmp owner, you can enjoy this benefit immediately! Stay tuned for the next steps The ScratchAmp is expertly engineered, using FireWire protocol to process multi-channel audio with minimal latency, allowing the software decks to respond as quickly as your hands.
The ScratchAmp's integrated switching power supply can be powered directly off of the FireWire bus of a Mac laptop or powered externally when permanently installed or used with a PC laptop. The small and rugged aluminum chassis is perfect for home use or on the road. Founded in , Stanton Magnetic's is an industry leader in the design and manufacture of professional audio products for club and mobile DJs and turntablists.
With over 50 years of innovation, Stanton is the name DJs trust. Nero required for burning. Iso File. Compatible with any ISO burning software. Discontinued Stanton CD Mixers. Discontinued Stanton Turntables. It has passed through multiple stages of development. These stages are marked by involvement with different companies, hardware configurations, software developers, licensees and licensors, and operating systems. The technical specifications of this device have been closely guarded by Stanton as an anti-piracy measure, though some users, unsatisfied with the latency and instability of the system, have alleged the use of faulty Philips sound chips which had already been withdrawn from the market.
However, the same chipset was being used in several other USB audio devices manufactured by companies like Griffin and Roland at that time.
It was relatively primitive but some users found that, if configured correctly, it outperformed all subsequent versions of Final Scratch 1. With version 1. As the name suggests, this bore a resemblance to the interface of Traktor, a Native Instruments software DJing product.
The next major revision was version 1. This version also added the ability to keep the pitch of the record constant whilst shifting the tempo. The interface changed very little, but some users initially had issues with the Windows Scratchamp drivers. Support for the original Scratchamp has all but since disappeared and current owners, disappointed by the lack of support by Stanton, have had to rely on old versions of Traktor FS or Digiscratch.
Version 2 marks the introduction of both a new Scratchamp hardware device and different software compatibility. They also replaced the USB interface with Firewire which was intended to reduce playback latency.
In late , Stanton and Native Instruments ended their working relationship. Stanton still markets the ScratchAmp hardware as part of Final Scratch Open , introduced in early Although all Windows and Mac audio software is ostensibly compatible with Final Scratch Open, there is no dedicated software program for deejaying with the ScratchAmp hardware. The internal workings of Final Scratch are quite simple to understand.
Multiple open source software libraries have been created to decode the Final Scratch time code. The information here comes from those libraries. It also has two phono stereo outputs for pass-through of the actual phono audio signal.
This is useful for DJs who wish to play both digital audio tracks AND traditional vinyl; allowing them to switch between the two sources without disconnecting or re-connecting audio jacks in the middle of a DJ set. The ScratchAmp does not store any audio on its own, it is simply a purpose built external Soundcard.
The most complex piece of the Final Scratch setup is the code pressed onto the vinyl. A hertz amplitude modulated sine wave is pressed into the left and right channels with a phase difference of 90 degrees.
0コメント