120.17.202.204: Migrated comment #21

2018-10-19T01:30:08Z

Migrated comment #21

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I am very close to purchasing the board from a vendor.

I have researched further on the EP91A6S IC with particular attention to the block diagram. Once the HDMI input signal is handled and 'passed' by the EP91A6S, it goes to two paths, the HDMI output and the IIS/SPDIF/DSD/HBR Processor. I shall concentrate on the latter the IIS/SPDIF/DSD/HBR processor.

From the block diagram, audio signals specified by the EP91A6S including for example LPCM, Dolby-HD and DTS-MA are processed. From the processor, there are two paths, a four channel I2S bus consisting of ILS_SD0 to ILS_SD3 and the SPDIF. In the X6000 the ILS_SDx (x = 0 to 3) signals are I2S signals sent to four DACs, the ES9023 x 4.

First, as specified by the X6000, the ES9023 is a stereo DAC with I2S inputs. Each DAC converts the I2S signals from the EP91A6S processor to stereo signals. In this case there is a DAC for each: L&R front, L&R side, L&R rear, Centre/LFE.

Second, the HBR's SPDIF signal drives the LED signal located above the X6000's hdmi output. Note that the SPDIF standard will only give you a maximum of 5.1 channels of lossy audio. You will never get 7.1 channel audio from SPDIF. That's the standard.

Nevertheless, as understood, the high-definition audio such as 7.1 channel Dolby-HD and DTS-MA analog outputs are available from the X6000's 3.5mm audio connectors.

Since the X6000 uses more current than the RPi, you will need to supply 5Vdc, 4A to the X6000 which supplies power to the RPi via the GPIO.

As far as I understand the only signals used from the RPi's GPIO are the 5V (pin1) and GND (pin2). I stand corrected on this, and I thank the answerer to my question Cindy the representative, the X6000 can run independently of the RPi.

In conclusion, if you have an HDCP-compliant blu-ray player and an amplifier that does not have decoding for high definition audio, it may well be that X6000 can well be used as a high definition audio decoder whose signals can be fed into an 8-channel amplifier from the X6000's 3.5mm analogue outputs.

If you follow the power up sequence of (1) turn on the TV, (2) turn on the X6000 and (3) turn on the blu-ray player.

I stand corrected on this and if I am wrong, please correct what I said.

Thank you and regards from
Anthony of Sydney

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120.17.202.204: Migrated comment #21