KnowledgeBase | K2600R | Audio Output


Working with the K2600 Digital Outs

Question:

I would like to generate a digital audio output signal from my K2600, what are my options and how does each work?

Answer:

You need to have either the Sampling Option, Digital I/O (DIO-26) Option or ADAT I/O Option installed in your unit if you want to be able to have Digital Output. Each offers different features and functionality.


For a K2600 with the Sampling Option (no Digital I/O option):

The sampling option provides a 16 bit stereo digital output, with both coaxial and optical connectors. This digital output is actually the output of the sampler's Analog to Digital Converter, and can convert external analog signals, or the K2's analog mix output, into AES/EBU or SPDIF format. This can be at a selected rate, either 48, 44.1, 32 or 29.6kHz, or can be slaved to an external clock.

Here's a step by step explanation of how to make the sampling option digital output work:

  1. Go to the Sample Mode page. (In Program, Setup, Quick Access, or Master mode, press the Sample soft button.)
  2. Set the value of the Input parameter to Digital to access the Format parameter.
  3. Set the value of the Format parameter as needed. SPDIF is the most common setting. You may want to use AES/EBU in professional environments.
  4. Set the value of Input to Analog to access the Source and Rate parameters.
  5. Set the Src parameter to Int for the K2's own analog mix output, or if you want to convert an external analog source to digital, set it to Ext.
  6. Set the Rate parameter as needed for cases where the K2 is the master. If you need to slave to an external clock, connect the master signal to the digital input, switch Input to Digital, and set the value of the Cable parameter to coaxial or optical, based on the digital input. The Input parameter controls whether the K2 is the master (Input=Analog) or slave (Input=Digital).

At this point if you generate audio on the K2 you should see its sample mode meters light up active, indicating the digital output is sending.

Assuming your receiving device is setup correctly (meaning as either master or slave, depending on your desired configuration) you now should have audio.


For a K2600 with the Digital I/O Option (no Sampling option):

The provided Coax & Optical outs are "always-on", fed by the internal A-bus. This is a fixed unalterable routing. Only audio routed to the A outs (Studio Editor/ OUTPUT page) will appear at the digital connectors. The signal is output at a fixed rate of 48kHz and must serve as clock master (ie it cannot slave). The output bit depth is 16 or 20 bits, software selectable via the "DigOutLen" parameter (Master/MAST2 page). The eight channel KDS output (for connecting to the DMTi) is also active and provides a copy of the signals routed to the eight separate outputs.


For a K2600 with both the Digital I/O and Samping Option:

With both the Digital I/O and Samping Options installed, you will see a new parameter added to the Master/MAST2 page called "AESOut".

If AESOut is set to "A (Dir)" (Direct), things will behave as described above (K2600 with the Digital I/O Option - no Sampling option).

If AESOut is set to "Mix (A/D)", then things will behave as described above (K2600 with the Sampling Option - no Digital I/O option).


For a K2600 with the ADAT I/O Option:

The provided 8-channel ADAT Out is "always-on", fed directly by the internal KDFX "Output A-D" studio FX busses (Studio Editor/ OUTPUT page). The signal is output at a fixed rate of 48kHz and must serve as clock master (ie it cannot slave). The output bit depth is 24 bits.

The output signal routing from the ADAT Option is as follows:

A Left > ADAT channel 1
A Right > ADAT channel 2
B Left > ADAT channel 3
B Right > ADAT channel 4
C Left > ADAT channel 5
C Right > ADAT channel 6
D Left > ADAT channel 7
D Right > ADAT channel 8

The ADAT option also provides a separate, standard stereo optical out labeled "AES Out". This output is "always-on", fed directly by the internal KDFX "Output-A" bus (Studio Editor/ OUTPUT page). The signal is output format is selectable AES/EBU or SPDIF (Master/MAST2 page - 'Format'). The sample rate is a fixed at 48kHz and must serve as clock master (ie it cannot slave). The output bit depth is selectable at 16, 20 or 24 bits (Master/MAST2 page - 'DigOutLen').


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