MP 4 Mixer for Serato Scratch Live

Front Panel

MP 4

Rear Panel

MP 4

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Scratch Live

MP 4 Mixer for Serato Scratch Live

The Serato / Rane partnership combines world class DJ software with sound card and mixer technology, providing a complete DJ system. Digital files virtually eliminate the need to carry vinyl or CDs to the gig. Heavy, invaluable music stays safe and sound(less) at home. The DJ is able to record special events and performances as well as convert vinyl into digital files.

The MP4 provides the convenience of playing digital music directly from your computer while still supporting traditional analog inputs for total flexibility. The MP 4 is the perfect mobile DJ or podcasting product, providing superior software and a one-box hardware solution using a single USB cable connected to a PC. Think of it as a professional 6-channel USB sound card with a mixer wrapped around it!

The MP 4 allows the user to simultaneously:
SSL Play analog sources
SSL Play digital files
SSL Record a stereo source and cue another source (digital or analog) with the built-in headphone cueing.

The MP 4 is a two-bus mixer with two stereo Line/Phono inputs, two stereo USB digital audio inputs and one stereo digital audio output to USB. Each bus has its own EQ and meter. Cueing of any source is provided with a high-quality headphone amplifier. The high-performance VCA Active Crossfader will deliver years of dependable service.

A-bus, B-bus, Master Mix or Microphone may be assigned to the USB record channel. The MP 4 allows easy digital recording of analog inputs not available on software-only solutions.

House outputs include both XLR and ¼" TRS connectors. A separate Auxiliary output and trim can feed a recorder or another zone.

Ground isolation is provided between the mixer and the PC, removing a major obstacle to good quality PC sound. The MP 4 contains an internal universal switching power supply (100-240 VAC).

The MP 4 ships with a CoreAudio driver for Mac and an ASIO driver for Windows, allowing it to act as a high quality sound card compatible with many audio applications, including Scratch Live.

The MP 4 is ideal for DJ's who want to mix and beat-match digital files along with analog sources, but don't require the ability to “scratch.” Serato Scratch Live software is included. Though there is no control vinyl or CD with the MP 4, the control screen has extensive transport controls and library management features.

Scratch Live after version 1.8 includes MIDI support. Certain DJ controllers can now manipulate the MP 4 and Scratch Live. Check the software release notes in the Downloads section at scratchlive.net for current supported controllers.

Serato Scratch Live

XP 2016S

Scratch Live supports all these file formats: Fixed and Variable Bit Rate MP3, AIFF, AAC, WAV, OGG Vorbis, CD Audio and direct from the mixer. Record direct from vinyl or CD and save as 16-bit 44.1 kHz stereo file.

Easily import your playlists and iTunes library. You can drag from Explorer (Windows) or the Finder (Mac) into the Scratch Live library. The crate and subcrate system helps organize your library and sets. Hot-swap external drives with fast automatic library merging and retention of crates. Browse your music collection by album, artist, BPM, or genre, with optional album art display. Intuitive search function can be applied to any field to find things quickly. Edit ID3 tags with full Unicode support.

Preprocessing of MP3 files is not required except to detect corrupt files or use the auto-BPM and auto-gain functions. Auto-BPM detects tempo information for tracks without it, saving it with each file. A tap tempo button allows you to enter your own. Auto-gain lets you set a target gain on any or all songs in your library. You can also manually adjust individual gain, remembered in each song file.

The Virtual Deck shows everything about the speed and position of a track. As the vinyl rotates, so does the line on the label. The circular progress bar around the edge is a visual representation of the position within the song. The time and remaining time are displayed in minutes and seconds. The percentage of pitch shift is on the left, and the pitched BPM is on the right.

The Virtual Deck operates with the MP 4 similar to DJ CD players. Rewind, Bend down, Play / pause reverse, Play / pause forward, Bend up, Fast forward. You can also play a sequence of tracks automatically.

With Key Lock on, the key or pitch of the song stays locked at what it would be if the track was playing at normal speed, regardless of the speed of the controller. Key Lock has scratch detection, so it automatically turns off when scratching for a natural scratching sound.

Variable zoom waveforms centered around current position display horizontally or vertically. Waveforms are colored by frequency so you can distinguish instruments visually. Full track overview lets you quickly find where the beat drops, find breakdowns and choruses, and jump to any part of the song. The tempo display assists with rapid tempo matching of tracks. When the two tracks are matched to the same tempo, the peaks will line up. Beat display emphasizes the transients in tracks -- these are matched up when the two tracks are beat matched. Visual markers can be set for up to 5 cue points per song and triggered from the keyboard. Save up to 9 loops per track -- these loops are saved in the file, and will be present when you reload. Censor expletives on the fly with an instant quick-reverse and catch-up with no loss of timing or pitch.

Built-in help and tips in multiple languages are accessible anytime. There is even a low power warning when running off a laptop battery.

Computer Requirements

The minimum operating system requirements for Scratch Live are:

Mac
1 GHz G4
1 GB RAM
OSX 10.3.9 or higher
Intel Macs require Scratch Live version 1.5 or higher

Windows
1.5 GHz PC
1 GB RAM
Windows XP with Service Pack 2 or higher
Windows Vista requires Versions 1.7.2 or higher

Note that support for Windows XP and Vista is limited to 32-bit installations. If you have a 64-bit machine and wish to use Scratch Live, you require the 32-bit version of your operating system.

Note that we recommend Windows XP over Vista for performance reasons. By using XP, you can have a lower latency (for a better vinyl feel) and better performance in general.

Please note: this is the minimum requirement to run Scratch Live. We recommend you use a higher spec computer, and particularly if you have a large library, you will benefit from having more RAM.

MP 4 Basic System Example

MP 4 Example System with just a laptop, headphones and amplifier (mic optional).

MP 4 Setup

MP 4 System with Controller

Example with a laptop, headphones, 2 zones of amplifiers, and optional mic. Two sets of turntables or CD players can be added to play regular vinyl or CDs, while Scratch Live manipulation comes from the MIDI DJ controller.

MP 4 Setup

iSkin® ProTouch® Control

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Have all the Scratch Live keyboard shortcuts right on your keys! ProTouch Keyboard Protectors work great to protect your MacBook or MacBook Pro keyboard in just about every environment. Whether it's at home or a gig, it does an effective job of keeping damaging elements from entering the keyboard and causing damage. Protects against • food particles • dust • hair • sweat • drinks • sand • finger oils and dirt • key wear • and more...

These are specially made from a high-grade silicone that is far beyond yesterday's plastic keyboard protectors and are precision molded to fit over and protect each key without sacrificing the normal typing experience. ProTouch keyboard protectors are easy to install. Simply place over the keyboard and massage into position. Its unique design allows it to stay securely in place and may be left on at all times. Keeping ProTouch clean is as simple as removing and washing with warm water and mild soap. Washing routinely also helps to prevent the spread of germs and cooties.

MP 4 Specifications

Parameter Specification Conditions
Phono / Line Inputs: 2 stereo pairs of RCA jacks Switchable RIAA curve
.....Input Impedance 47k / 220pf
.....Gain 46 dB / 0 dB 1 kHz
Line Inputs: 2 stereo pairs RCA jacks
.....Input Impedance 20 kΩ 1 kHz
.....Gain 14 dB 1 kHz
.....Frequency Response 10-27 kHz (+0, -3 dB) Gain 10 dB, 2 kΩ load
.....Noise, Unity Gain -82 dBu 20 kHz BW
.....Noise, Max Gain -80 dBu 20 kHz BW, re +4 dBu
.....THD+N 0.05% 20 kHz BW, re +0 dBu
.....Crosstalk <-70 dB 1 kHz
.....Control feedthrough <-80 dB 1 kHz
Tone Controls: Baxandall Two-band, shelving
Metering: Dual mono, 4-segment Peak responding
MIC Input: Balanced instrumentation ¼" TRS Jack
.....Input Impedance 511 Ω Each leg to ground, 1 kHz
.....Gain 60 dB 1 kHz
.....Frequency Response 20-20k Hz (+0, -3 dB) Gain 50 dB
.....Equivalent Input Noise -111 dBu 150Ω source, gain 50 dB
.....Common Mode Reject >40 dB at 1 kHz 150Ω source, gain 50 dB
House / Aux. Outputs: Stereo Balanced, ¼" TRS jacks
.....Output Impedance 200 Ω each leg, 1 kHz
.....Gain 6 dB 1 kHz
.....Maximum Output +24 dBu 1 kHz, 2 kΩ load
Converters: A/D 24-bit / 48 kHz 108 dB dynamic range
.....D/A 24-bit / 48 kHz 110 dB dynamic range
USB: 1.1, full speed 1 unit load (100 ma) isolated
Agency Listings: UL/cUL/CE  
Power Requirement: 100 to 240 VAC 50/60 Hz, 7W
Construction: All Steel 19" x 1U rack-mount
.....Unit Size 1.75"H x 19"W x 5.3"D 4.4 cm x 48.3 cm x 13.3 cm
.....Unit Weight 4 lb 1.8 kg
.....Shipping Size 4.25" x 20.3" x 13.75" 11 cm x 52 cm x 35 cm
.....Shipping Weight 8 lb 3.6 kg
Note: All specifications are typical unless otherwise stated.