Topic: AES to SPDIF AUDIO artefacts problem
Hello
I have a Reverb rack and an Fireface UC
So i have found this cable to link the two machines
https://www.thomann.de/fr/pro_snake_aes … able_3.htm
( it was mentionned : Suitable for RME interfaces )
but some glitch or artefacts occured after a moment
Some tells me that the rme get warm
But later someone has tell me that there was a probleme of inpédance between the reverb 110 ohms and rme 75 ohms so an adapter was require
Is this is the solution with AES cable out to adapater to Spdif cable ???
https://www.thomann.de/fr/neutrik_nadit … l_148519_4
I also read on the notice but its confusing that we can use AES cable
ok Im lost if someone has a clear solution ( and not a audio numeric lesson )
Many thks in advance
24.2 SPDIF
The Fireface UC has two SPDIF inputs and outputs. Coaxial and optical can be used simultaneously,
with different audio signals. Note that the sources have to be synchronous, as the unit
does not have a dedicated sample rate converter.
The optical input automatically switches to SPDIF operation when such a signal is detected.
The audio information is then shown in TotalMix on the first two ADAT channels, In 11 and In
12.
To send out SPDIF from the optical output, select the option Optical – SPDIF in the Settings
dialog. The output signal in TotalMix has to be present on the first ADAT channels, AS 1+2.
The Fireface UC’s inputs accept SPDIF as well as AES/EBU.
To receive signals in AES/EBU format,
an adapter cable is required. Pins 2 and
3 of a female XLR plug are connected
individually to the two pins of a phono
plug. The cable shielding is connected
to pin 1 of the XLR and the ground
contact of the phono plug.Special Characteristics of the SPDIF Output
Apart from the audio data itself, digital signals in SPDIF or AES/EBU format have a header containing
channel status information. False channel status is a common cause of malfunction. The
Fireface UC ignores the received header and creates a totally new one for the output signal.
The Fireface UC’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
• Aux bits Audio Use
Professional AES/EBU equipment can be connected to the Fireface UC thanks to its ‘Professional’
format option and a doubled output voltage. 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
accept signals in ‘Consumer’ format!
Therefore in SPDIF mode the optical output is set fixed to Consumer.
