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Is it possible to connect the I2S output (as shown below) directly from a Philips CDPro2LF transport to the Buffalo ?
 Edited by user Thursday, September 25, 2008 3:10:21 AM(UTC)
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Yes and no. The connections are correct, but the CDPro only outputs 48fs data, and the Buffalo requires 64fs. You can either use a Metronome (or other upsampler) to achieve this, or simply use the CDPro's S/PDIF outputs, which is what I would recommend for simplicity.
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Hi Brian,
thanks for your quick reply. If simplicity & cost aside, which do U think will have a better sound quality ?
1) (CD Pro2LF via I2S) >>> Metronome >>> Buffalo
or
2) (CD Pro2LF via SPDIF) >>> Buffalo
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According to Dustin at ESS, there should be no difference in sound quality, despite what other are saying on various forums. I cannot hear a difference, and I choose to trust the chip designer (call me crazy).
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So when will the Buffalo be available for order ? Can't wait to try it out with my DIY CD Player. 
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We are in the process of getting more ready now.
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I have all but completed my CDPRO2 - Metronome - Buffalo combo, cant wait to test the spdif/I2S back to back. So I need the switch settings for 64fs on the Metronome. Texas replied "You don't need any settings for system clock frequency selection, it is automatically detected by internal clock manager circuit. Either of 128/192/256/384/512/768fs detection is based on LRCK clock as fundamental sampling rate, fs. If the output port is being operated in Master mode, the BCK is fixed at a 64Fs rate, where Fs = the output sampling rate." So - what is your recomended switch setup to achieve this. thanks wayne Edited by user Wednesday, October 15, 2008 3:41:21 PM(UTC)
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Hi Wayne, I am about to do exactly what U did so it would be nice if you could post your views/results once U have tested the SPDIF vs the I2S. (using Metronome) Looking forward to your review. wobbly wrote:I have all but completed my CDPRO2 - Metronome - Buffalo combo, cant wait to test the spdif/I2S back to back.
So I need the switch settings for 64fs on the Metronome.
Texas replied "You don't need any settings for system clock frequency selection, it is automatically detected by internal clock manager circuit. Either of 128/192/256/384/512/768fs detection is based on LRCK clock as fundamental sampling rate, fs. If the output port is being operated in Master mode, the BCK is fixed at a 64Fs rate, where Fs = the output sampling rate."
So - what is your recommended switch setup to achieve this.
thanks
wayne
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wobbly wrote:I have all but completed my CDPRO2 - Metronome - Buffalo combo, cant wait to test the spdif/I2S back to back.
So I need the switch settings for 64fs on the Metronome.
Texas replied "You don't need any settings for system clock frequency selection, it is automatically detected by internal clock manager circuit. Either of 128/192/256/384/512/768fs detection is based on LRCK clock as fundamental sampling rate, fs. If the output port is being operated in Master mode, the BCK is fixed at a 64Fs rate, where Fs = the output sampling rate."
So - what is your recomended switch setup to achieve this.
thanks
wayne
For I2S output on the metronome the bit clock is already fixed at 64fs. So you don't need to do anything for that. Just set the Metronome input 24-bit I2S and to output 24-bit I2S at 512fs, 256fs, or 128fs (48khz,96khz,192khz respectively) per the manual and wire bit clock, word clock, and data to the Buffalo. Wire your bit clock, word clock, and data from the CDPRO2 to the metronome. That should be all you need to do. Cheers! Russ Edited by user Thursday, October 16, 2008 7:28:46 AM(UTC)
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Thanks alot for advise. Technically or aurally any advantages/disadvantages to be had say increasing the sampling from 96 to 192 Edited by user Thursday, October 16, 2008 2:31:39 PM(UTC)
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Well, I don't really know. Try both and see what you like. :)
What I do know is that once the I2S is received the DAC will upsample it to about 2mhz. :)
Cheers!
Russ
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Have tried the back to back,I2S against SPDIF. First test was the CDPRO2 with Tent reclocked Spdif,very difficult on HD650s but on my full system the only difference i could detect was the sound of the "room" in the recordings. I2S seems to convey more minutae of sound decays and the illusion of space in the venue or studio. Swapping to a Pioneer PD506 ( an oldie but goody with upsidedown transport) this Spdif had no detail at all in comparison, as did a Shanling CDT200. So - appears the old story about source quality dictating the end result still applies, the top notch transport with clean Spdif is very very good, but even the clever Sabre cannot reconstruct good sound from a substandard digital stream. Played around with the Metronome sampling and cant hear any difference at all between 96 or 192 Edited by user Monday, October 27, 2008 6:31:33 PM(UTC)
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Brian Donegan wrote:Yes and no. The connections are correct, but the CDPro only outputs 48fs data, and the Buffalo requires 64fs. You can either use a Metronome (or other upsampler) to achieve this, or simply use the CDPro's S/PDIF outputs, which is what I would recommend for simplicity. Brian: from the Sabre8 specifications: "The SPDIF switch should be “OFF” for PCM input. The default basic firmware is setup for 24bit I2S PCM format." As I know, the "24bit I2S" means "48fs data" (64fs = 32bit) am I right? My original plan was using my buffalo with my CDPro2LF i2s signal directly... 
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