Numark Scratch Two-Channel DJ Scratch Mixer User Manual

1. Introduction

The Numark Scratch is a professional 24-bit two-channel DJ scratch mixer, engineered for demanding performances and seamless integration with Serato DJ Pro. This robust unit combines an all-metal construction with advanced features, setting a new standard for scratch mixers.

Key features include a built-in Innofader crossfader, responsive performance pads, an intuitive instant loop encoder, and dedicated toggle paddles for triggering software-based effects. The Scratch mixer is designed to provide exceptional sound quality and versatile control for both traditional vinyl and digital vinyl systems (DVS).

2. Setup

2.1. Connections

The Numark Scratch offers comprehensive connectivity options to suit any DJ setup:

Main Outputs: Balanced XLR outputs for connecting to a main sound system.
Booth Output: Unbalanced booth output for monitoring.
Channel Inputs: Unbalanced line/phono inputs for connecting turntables or media players.
Microphone/Auxiliary Input: Combo input (XLR or 1/4-inch TS) with dedicated mic level control for vocal performances or external audio sources.
USB Connectivity: USB port for connection to a computer for Serato DJ Pro integration.

Figure 2.1: Rear panel connections of the Numark Scratch mixer.

Figure 2.2: Example setup of the Numark Scratch with two turntables.

2.2. Software Installation

The Numark Scratch includes a full version of Serato DJ Pro and the complete DVS Expansion Pack. This allows immediate control of Serato DJ Pro using NoiseMap Control Tone vinyl or CDs (sold separately).

Connect the Numark Scratch to your computer via the USB port.
Download and install Serato DJ Pro from the official Serato website.
Follow the on-screen instructions to activate your Serato DJ Pro license and DVS Expansion Pack.

3. Operating

3.1. Controls Overview

The top panel of the Numark Scratch is intuitively laid out for quick access to all essential controls.

Figure 3.1: Top-down view of the Numark Scratch mixer's control panel.

3.2. Channel Controls

Input Gain: Adjusts the input level for each channel.
3-Band EQ: Provides control over high, mid, and low frequencies for sound shaping.
High/Low-Pass Filter: Hardware-based filter that works with both Serato and analog sources.
Channel Faders: Controls the volume of each channel.
Headphone Cue: Assigns a deck to your headphone mix for pre-listening.
Line/Phono/PC Switch: Selects between Serato control, analog turntables, or media players for each channel.

3.3. FX Section

The mixer features six direct access software FX buttons for quick application of effects:

FX Selectors: Choose from various Serato effects like Delay, Reverb, Echo, Flanger, V. Echo, and Phaser.
Toggle Paddles: Dual performance-based toggle paddles allow for momentary or held activation of effects. Pull down for momentary, push up to hold.
Dry/Wet FX Knob: Controls the intensity and blend of the applied effect.

3.4. Innofader Crossfader

The premium Innofader crossfader is designed for super sharp cuts and smooth transitions, ideal for scratch DJs.

Reverse Control: Reverses the direction of the crossfader.
Slope Control: Adjusts the curve of the crossfader from a smooth blend to a sharp cut.
Hamster Switch: Allows for quick reversal of the crossfader direction for different scratch styles.

3.5. Performance Pads

Four performance pads per deck offer versatile control for creative mixing:

Hot Cue Triggering: Instantly jump to pre-set cue points in your track.
Rolls: Create rhythmic rolls for build-ups and quick beat stabs.
Sampler Control: Trigger samples for adding unique elements to your mix.

3.6. Instant Loop Encoder

The instant loop encoder simplifies looping within Serato DJ Pro:

Activate Loop: Press the encoder down to activate a loop at the default parameters (typically 4 bars).
Extend Loop: Turn the knob to the right to extend the loop length.
Shorten Loop: Turn the knob to the left to shorten the loop length.

3.7. Output Controls

Master Output Volume: Controls the overall volume of the main mix.
Booth Volume Control: Independent volume control for the booth output.

4. Maintenance

To ensure the longevity and optimal performance of your Numark Scratch mixer, regular maintenance is recommended:

Cleaning: Regularly wipe down the unit with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
Dust Protection: When not in use, cover the mixer to prevent dust accumulation, especially around faders and knobs.
Cable Management: Ensure all cables are properly connected and not under strain to prevent damage to ports and internal wiring.
Storage: Store the mixer in a cool, dry place away from direct sunlight and extreme temperatures.

5. Troubleshooting

If you encounter issues with your Numark Scratch mixer, consider the following basic troubleshooting steps:

No Power: Ensure the power cable is securely connected to both the mixer and a working power outlet.
No Audio Output: Check all audio cable connections (main, booth, channel inputs). Verify input gain and master/booth volumes are set appropriately. Ensure the correct input source (Line/Phono/PC) is selected for each channel.
Serato DJ Pro Not Recognizing Mixer: Confirm the USB cable is securely connected. Restart Serato DJ Pro and your computer. Ensure the latest drivers for the Numark Scratch are installed (if required by your operating system).
Fader/Knob Issues: If faders or knobs feel stiff or are not responding correctly, ensure no debris is obstructing their movement. Avoid applying excessive force.
Distorted Audio: Check input gain levels to prevent clipping (indicated by red LEDs on the level meters). Ensure all cables are in good condition and properly shielded.

For more complex issues, refer to the comprehensive user manual PDF or contact Numark customer support.

6. Specifications

Item Weight	5.91 pounds (2680 Grams)
Product Dimensions	12.6 x 9.65 x 4.25 inches (32.0cm D x 24.5cm W x 10.8cm H)
Number of Channels	2
Connectivity Technology	USB
Power Source	Corded Electric
Country of Origin	China
Date First Available	June 13, 2019

7. Warranty and Support

Numark products come with a standard manufacturer's warranty. For detailed warranty information, including terms, conditions, and registration, please refer to the official Numark website or the warranty card included with your product.

For technical support, product registration, or to access the latest drivers and software updates, please visit the Numark support page:

Numark Official Support

You can also download the full user guide in PDF format for more detailed instructions and diagrams:

Download User Guide (PDF)

	Numark Scratch DJ Mixer User Guide and Setup Discover the features and functionality of the Numark Scratch DJ mixer. This guide provides essential information on setup, connections, software integration with Serato DJ Pro, and advanced DVS capabilities for professional DJs.
	Numark SCRATCH User Guide This user guide provides comprehensive instructions for the Numark SCRATCH DJ controller, covering setup, software integration with Serato DJ Pro, features, operation, and Digital Vinyl System (DVS) capabilities.
	Numark SCRATCH DJ Controller User Guide Comprehensive user guide for the Numark SCRATCH DJ controller, covering setup, features, operation, software integration with Serato DJ Pro, and DVS capabilities. Includes technical specifications and support information.
	Numark M4 Professional 3-Channel Scratch Mixer Quickstart Guide Concise HTML guide for the Numark M4 professional 3-channel scratch mixer, covering box contents, registration, setup ground rules, and connection diagram.
	Numark Mixstream Pro Go Quick-Start Guide - Serato DJ Pro Quick-start guide for the Numark Mixstream Pro Go DJ controller, covering setup, software, hardware overview, performance pads, MIDI mapping, and help resources with Serato DJ Pro.
	Numark Mixtrack Pro FX User Guide A comprehensive user guide for the Numark Mixtrack Pro FX DJ controller, detailing setup, connection, and operation of all features.

Numark Scratch