R1-R4 on the S/PDIF4 board are the termination resistors for the inputs. The kit now comes with three sets of resistors for these positions: 75R for consumer-level S/PDIF (standard), 110R for AES/EBU, and 10K for TTL-level S/PDIF.

Basically, use the correct termination resistor for each position, depending on which type of input you want it to accept.

The switch board connects to positions 1-4 of the I/O header on the Buffalo-III. Use the same four positions on the switch board (observe the orientation marks). The correct four positions on the switch board actually have a box drawn around them in the silk. (SEE FIRST PICTURE)

The LEDs can either be mounted directly on the switch board, or remotely. Mounting on the switch board allows you to have them right next to your source-selection knob on your front panel. Remote mounting let's you put them anywhere you want. No additional wiring is required for the LEDs.

Edited by user Friday, November 11, 2011 5:42:18 AM(UTC)  | Reason: Not specified

Thank you for this wonderful explanation!
I've a question referring to the "Buffalo III DAC Integration Guide" on side 12:



Which preconditions does this have? Is it enough not to connect a input on the green terminals on the Input Board, or do I have to leave the resistor open, or do I only need to connect the 2 correct pins from the 2bit-selector-board with the "trigger" terminal on the sidecar board?

Thank you very much!

Kind regards
Matthias

Hmm, what I would do if you want to use one position to switch the side car is simply run a wire from that position's remote LED spot to the "B" (base) terminal on the sidecar. You can even leave the LED in place.

Give it a try.

Hi!

If i turn the switch, then a relais is clicking, so i think it works. To be totaly sure, i would need the tpa usb transport! ;)
My buffalo sings, i like it! Now i'm unpatiently waiting for the new high-res transport! (i don't ask when the transport is ready)

Kind regards
Matthias

When using the Sidecar this way (triggered off the switch board) you need to drop the value of R1 on the Sidecar to something like 1K.

It's in another thread somewhere. We didn't actually design them to work together that way, but they do. I may alter the kits to make it easier, as it seems like a good idea.

Where did you coonnected the B (Base) terminal on the Sidecare module, pin 4 selector switch?

As evidenced in this thread, it is probable best to use position #1 (or 3) if you are going to try this mod. It will, of course, only be an issue with very high resolution content on the I2S/DSD lines.

The ES9018 has an autodetect for SPDIF - if you don't turn it off it can sometimes think that PCM(I2S) is SPDIF and will unlock and try to re-lock onto what it thinks is SPDIF. By using position 1 or 3 you set the ES9018 to channel that is not very likely to have a signal that is like SPDIF. So you will get a solid lock. Position 2 & 4 are the worst to use as it is a data line for I2S, and at high sample rates the ES9018 can think it might be SPDIF and will unsuccessfully attempt to lock onto it.

A better solution is to use a two pole two position switch. With one pole to GND and one to 5V. Connect the switch so that one pole goes to "B" on the sidecar, and one to I/O port B5(SPDIF auto-detect bypass) on the Buf III.

The way when the switch is in one position the "B" pole will be high, and the B5 pole will be open (low). When the switch is in the other the "B" pole will be low and the B5 pin will be open (high).

Now you have all 4 SPDIF selections to use and even better - I2S will "never" confuse the ES9018 as being SPDIF.

Edited by user Thursday, April 5, 2012 3:14:12 PM(UTC)  | Reason: Not specified

10-4, got it, understand it, thanks. ;) Kind of like this.....

Edited by user Friday, April 6, 2012 6:02:04 PM(UTC)  | Reason: Not specified