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neutral labs SCRAT v1.1, Manual

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SCRAT v1.1

by neutral labs

Manual

Hello, owner.

SCRAT is an aggressive sounding multimode Steiner-Parker filter with a
twist: You can change the resonance response by plugging in components
like diodes, capacitors or resistors directly to the front panel. A
set of preset cartridges is also available, which gives you instant

access to a variety of filter sounds.

Summary of Contents for SCRAT v1.1

Page 1: ... multimode Steiner Parker filter with a twist You can change the resonance response by plugging in components like diodes capacitors or resistors directly to the front panel A set of preset cartridges is also available which gives you instant access to a variety of filter sounds ...

Page 2: ...is protected in case you should ever connect it the wrong way around but it won t turn on if you do Module Function SCRAT is a 2 pole 12 dB Octave multimode Steiner Parker filter VCF that offers high pass and low pass modes and is quite aggressive sounding In addition to the built in sound shaping possibilities the user can optionally modify the filter s character by plugging passive electronic co...

Page 3: ...nents or cartridges are currently inserted into the modifier ports see below RESO This changes the filter s resonance Q factor In the fully counterclockwise position there is no resonance Around the 10 o clock position the filter will start to self resonate depending on the other controls settings with the intensity increasing up to the fully clockwise position FREQ This determines the cutoff freq...

Page 4: ...lso slightly adjust the cutoff This is inherent to the Steiner Parker filter design If you need 1V Octave tracking throughout your track or performance do not change the RESO setting once a satisfactory tracking has been established Control Voltage CV Inputs Both CV inputs expect signals within the 0V to 10V range Don t worry about supplying a higher or lower CV though It will not harm the module ...

Page 5: ...tors unless you know exactly what you re doing Reverse voltage may make them explode violently You may use them with the positive leg on one of the P ports and the negative leg on one of the G ports but it is better to avoid them completely Large value bipolar ceramic capacitors are easily available and should be used instead The use of active components like transistors could result in unexpected...

Page 6: ...s should go to ground in parallel connect either of them to one of the P ports and both of their other legs to a G port Accidentally shorting from P or S to ground will not harm your component or the module as the circuit is protected by a 1k resistor to ground Modifier Port Patch Ideas Diodes or LEDs work well in parallel especially if using two different diode types while their polarities are op...

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