Special Characteristics of the SPDIF Output

Apart from the audio data itself, digital signals in SPDIF or AES/EBU format have a header con- taining channel status information. False channel status is a common cause of malfunction. The Fireface 800 ignores the received header and creates a totally new one for the output signal.

Note that in record or monitor modes, set emphasis bits will disappear. Recordings origi- nally done with emphasis should always be played back with the emphasis bit set!

This can be done by selecting the Emphasis switch in the Settings dialog (SPDIF Out). This setting is updated immediately, even during playback.

Note: Recordings with (pre-) emphasis show a treble boost (50/15 µs), which has to be com- pensated at playback. Therefore, when selecting Emphasis all analog outputs will be processed by a treble filter based on 50/15µs, which sounds like a high cut.

The Fireface’s new output header is optimized for largest compatibility with other digital devices:

•32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz depending on the current sample rate

•Audio use, Non-Audio

•No Copyright, Copy Permitted

•Format Consumer or Professional

•Category General, Generation not indicated

•2-channel, No Emphasis or 50/15 µs

•Aux bits Audio Use

Professional AES/EBU equipment can be connected to the Fireface 800 thanks to the trans- former-balanced coaxial outputs, and the ‘Professional’ format option with doubled output volt- age. Output cables should have the same pinout as those used for input (see above), but with a male XLR plug instead of a female one.

Note that most consumer HiFi equipment (with optical or phono SPDIF inputs) will only ac- cept signals in ‘Consumer’ format!

The audio bit in the header can be set to 'Non-Audio'. This is often necessary when Dolby AC-3 encoded data is sent to external decoders (surround-sound receivers, television sets etc. with AC-3 digital inputs), as these decoders would otherwise not recognize the data as AC-3.

29.3 MIDI

Fireface 800 offers one MIDI I/O via two 5-pin DIN jacks. The MIDI ports are added to the sys- tem by the driver. Using MIDI capable software, these ports can be accessed under the name Fireface Midi. Using more than one Fireface, the operating system adds a consecutive number to the port name, like Fireface MIDI (2) etc.

The MIDI ports support multi-client operation. A MIDI input signal can be received from several programs at the same time. Additionally the GSIF-2 Low Latency MIDI port is available for use with Gigastudio 3. Even the MIDI output can be used by multiple programs simultaneously. However, due to the limited bandwidth of MIDI, this kind of application will often show various problems.

Note: The MIDI input LED displays any kind of MIDI activity, including MIDI Clock, MTC and Active Sensing. The latter is sent by most keyboards every 0.3 seconds.

User's Guide Fireface 800 © RME

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Intel Fireface 800 manual Midi, Special Characteristics of the Spdif Output
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Fireface 800 specifications

The Intel Fireface 800 is a powerful audio interface celebrated for its high-performance capabilities and versatility in both studio and live settings. Designed to cater to the needs of musicians, producers, and sound engineers, it stands out with its rich feature set and reliable technology.

One of the defining features of the Fireface 800 is its support for an impressive 26 input and 28 output channels. This extensive I/O configuration facilitates seamless integration with a wide variety of audio production setups, allowing users to record multiple instruments simultaneously or create complex routing scenarios. The unit also boasts top-notch analog and digital converters, ensuring pristine sound quality with a dynamic range that captures the nuances of any audio source.

In terms of connectivity, the Fireface 800 is equipped with both FireWire and USB ports, making it compatible with a range of computers and devices. The device utilizes the FireWire 800 protocol, which delivers higher data transfer rates compared to its predecessor. This efficient transfer capability is crucial for maintaining audio fidelity and reducing latency, making it an ideal choice for real-time monitoring and recording.

The Fireface 800 also features standalone operation capabilities, functioning independently of a computer when needed. This is particularly useful for live performances, where reliability and reduced setup complexity are essential. Users can easily connect microphones, instruments, and other equipment directly to the Fireface 800, making it a versatile tool for a variety of scenarios.

With its low-latency driver technology, the Fireface 800 ensures smooth performance even when handling demanding audio tasks. Its advanced ADAT and S/PDIF digital inputs and outputs provide further flexibility for connecting other gear, such as additional preamps and effects processors.

Another noteworthy characteristic of the Fireface 800 is its robust build quality. Designed for regular use in professional environments, the unit features a rugged metal chassis that can withstand the rigors of transport and daily use. This ensures longevity and consistent performance for audio professionals who depend on reliable equipment day in and day out.

In summary, the Intel Fireface 800 is a versatile and powerful audio interface that caters to a wide spectrum of audio production needs. With its extensive I/O capabilities, high-quality converters, reliable connectivity options, and robust design, it continues to be a popular choice among audio professionals striving for excellence in their work.
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