The Studio 192-series and Quantum-series interfaces support S/MUX, allowing you to recording and playback 16 channels at 88.2 kHz or 96 kHz. By using S/MUX technology, you can stream 8 channels of digital audio at 88.2 kHz or 96 kHz over the same Lightpipe connection originally designed to stream 16 channels of 44.1 kHz or 48 kHz audio. S/MUX works by joining two or more digital audio channels to represent a single higher-bandwidth channel. “Sample Multiplexing” or S/MUX is used to transmit high-bandwidth digital audio using lower-bandwidth technology, such as ADAT Lightpipe. Just be sure to read the section on digital synchronization! S/MUX

So, even if your audio interface was built by another manufacturer, if it has ADAT inputs and/or outputs, you can connect it to other ADAT-equipped devices. It should be noted that ADAT is a universal protocol. The DigiMax DP88 takes this a step further, by offering both ADAT input and ADAT output, allowing you to expand both the inputs and the outputs of your ADAT-equipped audio interface. The DigiMax D8 is a companion 8-channel preamp with ADAT output to expand the inputs of any audio interface with an ADAT input. But because of its ADAT I/O, it can be expanded to record up to 22 inputs simultaneously, simply by adding an ADAT-equipped converter, like the DigiMax-series preamps. For example, the Studio 192 Mobile is only equipped with four analog inputs, making it compact enough to fit in your laptop bag. PreSonus uses ADAT Lightpipe I/O on both the Studio 192-series and the Quantum-series interfaces for exactly this purpose. Today, many audio interface manufacturers use ADAT optical and its cousin S/MUX (more on that in a minute) to provide an easy and affordable way to add inputs and outputs to your recording rig when needed. The generic name for this standard is “EIAJ optical.” Toslink is an optical-fiber connection system developed by Toshiba that uses a JIS F05 connector. These cables can be purchased at your local recording-equipment store. The ADAT Lightpipe format has been adopted by many audio manufacturers because it's a compact way to transfer multichannel digital audio data between devices.ĪDAT Lightpipe uses the same type of optical cables and Toslink connectors as the S/PDIF two-channel optical digital audio protocol (discussed shortly).

The ADAT Optical interface protocol, commonly referred to as “ADAT Lightpipe,” was developed to stream eight channels of 16-, 20-, or 24-bit digital audio at 44.1 kHz or 48 kHz, allowing multichannel digital transfers between ADAT digital recorders and other digital audio devices over a single fiber-optic cable. The Alesis ADAT modular digital multitrack tape recorder allowed users to record eight tracks of digital audio simultaneously. To help you understand these technologies, we’ve prepared a brief tutorial on digital connections and synchronization. Some PreSonus products also have dedicated, standardized connections for digital-audio synchronization signals.

Many PreSonus products are equipped with standardized digital audio inputs and outputs, enabling them to transfer digital audio to and from an assortment of devices without conversion to and from the analog domain.

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