Rear Panel Features

1.Sustain Jack - This jack allows you to connect an optional footswitch to the keyboard. When the footswitch is depressed, notes played on the keyboard will continuously sound as long as the footswitch is held, while MIDI controller information is sent from the Radium.

2.MIDI “Keyboard” Out Jack - This standard MIDI jack is a direct MIDI out from the keyboard in “standalone” mode, and is used to send MIDI messages to another MIDI instrument (such as sound module).

3.MIDI “USB” Out Jack” - This standard MIDI jack receives its source from the computer when software is set to Radium MIDI Out, and is used to send MIDI messages to another MIDI instrument (such as sound module).

4.USB Port - This USB connector jack is used to connect the Radium to the computer’s USB port using a standard USB cable (included).

5.Power Switch - The 3-way power switch selects the Radium’s power mode—powered by USB connection, by external power supply or internal battery (6 size C - Radium49 only), or power off.When set to “USB Power” the Radium receives power only after the computer is powered on. When the Radium’s power is turned on, the keyboard will reset to it’s default settings.

6.Power Jack - This jack is used to connect the keyboard to an optional 9VDC, 500mA “wall-wart” type power supply.

RAD-050503 specifications

The M-Audio RAD-050503 is a powerful audio interface designed for musicians, producers, and sound engineers seeking high-quality recording and playback capabilities. This device is particularly notable for its versatility and high-performance features, making it an excellent choice for both home studios and professional environments.

One of the standout characteristics of the RAD-050503 is its exceptional audio quality, offering high-resolution audio capture at sample rates up to 192 kHz. This level of fidelity ensures that recordings are true to the original sound, preserving the nuances and subtleties of each instrument or voice. The device supports both 24-bit and 32-bit audio formats, providing flexibility for various recording requirements.

Equipped with multiple input options, the RAD-050503 includes XLR/TRS combo jacks that cater to microphones, guitars, and line-level sources. This flexibility makes it easy to connect different recording instruments without needing additional interfaces. The device also features phantom power, enabling the use of condenser microphones, which are essential for capturing high-quality vocal tracks.

For monitoring, the RAD-050503 provides high-output headphone outputs and balanced TRS main outputs. This ensures that users can achieve accurate sound representation during recording sessions, allowing for real-time monitoring without latency issues. The built-in zero-latency monitoring feature further enhances the recording experience by allowing musicians to hear their inputs directly through their headphones without delay.

In terms of connectivity, the RAD-050503 is USB-powered, providing a straightforward plug-and-play setup with minimal fuss. It is compatible with both Mac and Windows operating systems, making it accessible for a wide range of users. The interface is also equipped with MIDI I/O ports, allowing for seamless integration with MIDI devices, synthesizers, and controllers.

The rugged, compact design of the RAD-050503 makes it highly portable, making it suitable for musicians on the go. Users can easily transport it to live gigs or collaborate in different studio environments. The unit's thoughtful layout, featuring easy-to-use knobs and indicators, allows for intuitive operation, catering to both novice and experienced users alike.

In summary, the M-Audio RAD-050503 audio interface combines top-notch audio performance, versatile connectivity options, and user-friendly design, making it an excellent choice for anyone serious about recording and producing high-quality music.