The scope view is a graphic depiction of how Scratch Live is reading the control signal it is receiving, displayed as a series of green circles. Other information is also displayed, which is explained below.
This is an example of a good, clean signal displayed in the scope view:
For optimal performance the inner ring should be as close to circular as possible. Use the scope zoom slider (1x to 16x) to zoom in or out as necessary. Use the scope L/R balance and P/A balance controls to adjust the shape of the inner ring.
The top left corner of the scope view displays which control signal Scratch Live is reading (the example above shows it is CV02B, which translates as contol vinyl, version 2, side B). The number below gives the current absolute position within the control vinyl or CD.
The top right corner shows the current speed in RPM.
The bottom left corner is the current threshold setting.
The bottom right corner shows the percentage of readable signal – this number should be as close to 100% as possible when your system is calibrated properly. At values of less than 85% you may start to experience tracking difficulties.
Many playback problems that you encounter when using Scratch Live can be attributed to not getting a good reading of the control signal from your vinyl or CDs. The scopes are a great tool for diagnosing what is happening. Following are the most common scope views you may encounter with suggestions to help you solve the problems they can represent.
Note: Some problems cause similar looking scopes (eg. dusty needle and damaged needle) so it is recommended to try all suggested solutions until your problem is solved.
Click on an image to for a diagnosis, solution and a larger image.
