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XMOS-based Asynchronous USB to I2S interface
XMOS-based Asynchronous USB to I2S interface
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Old 29th September 2012, 04:36 PM   #1271
labjr is offline labjr  United States
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Quote:
Originally Posted by apoo View Post
Hi Lorien,

does/will the WaveIO support native DSD64/128 files?


apoo
I would think if using DoP the WaveIO would be transparently pass is along as if it were PCM.
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Old 29th September 2012, 05:34 PM   #1272
Boggy62 is offline Boggy62
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Quote:
Originally Posted by Boggy62 View Post
Hi,
I read you used isolated spdif and i would ned a small support on it.
Can you just clarify for me the isolated connexion on j11: inside ( hot) on the square, called isol or rounded hoe ( called spdif) as lorian gave me direction for j10 and same time recommended not to use it

Thanks for your possible help

Francois
Ok I found it: square in j11 for hot spdif connexion: sounds indeed very good just connected to a vdac.
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Old 29th September 2012, 05:41 PM   #1273
Lorien is offline Lorien
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@ tagheuer & ozlegend: Thank you and thank you! Let's hope the daughter board will make some difference to this and will rise the SQ level, hopefully, more than a little bit... Still, no promises

Quote:
Originally Posted by apoo View Post
Hi Lorien,
does/will the WaveIO support native DSD64/128 files?
apoo
Not for now. But I hope one day, with DFU support, I'll convince WaveIO to play DSD64/128.

@ Boggy62: you already have PM.

Quote:
Originally Posted by labjr View Post
I would think if using DoP the WaveIO would be transparently pass is along as if it were PCM.
Not quite. WaveIO does not support DSD audio format, just I2S thus it can't be used to feed DACs with DSD support enabled.

Cheers,
L
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Old 29th September 2012, 05:56 PM   #1274
qusp is offline qusp  Australia
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DSD is a completely different kettle of fish, there are some tricks to pass it along in a 176.4 PCM container, but its not actually PCM, so you would be asking for trouble.
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Old 29th September 2012, 06:52 PM   #1275
Sandor is offline Sandor  Italy
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Thank you wlowes.

Quote:
Originally Posted by wlowes View Post
See post #1084. I use L5 pin as a source of 176.4Khz for DEM.
Are all the signals on J9 always present, independently of source sample rate?
Or is active only the port corresponding to the source sampling rate (i.e. signal on L1 only with 44K source, signal on L9 only with 96K source, and so on) ?
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Old 29th September 2012, 09:47 PM   #1276
wlowes is offline wlowes  Canada
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Quote:
Originally Posted by Sandor View Post
Thank you wlowes.



Are all the signals on J9 always present, independently of source sample rate?
Or is active only the port corresponding to the source sampling rate (i.e. signal on L1 only with 44K source, signal on L9 only with 96K source, and so on) ?
Paul,
Lorien can correct me. As I understand, it is simply a clock signal present regardless of source signal. EG I get 172.1 regardless of what I am playing. If you choose 172.4 for DEM, it will sync most cleanly with material that plays at a multiple of 44.1. So 88.2 will sound marginally better than 96.
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Old 29th September 2012, 10:43 PM   #1277
Sandor is offline Sandor  Italy
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Quote:
Originally Posted by wlowes View Post
Paul,
Lorien can correct me. As I understand, it is simply a clock signal present regardless of source signal. EG I get 172.1 regardless of what I am playing. If you choose 172.4 for DEM, it will sync most cleanly with material that plays at a multiple of 44.1. So 88.2 will sound marginally better than 96.
This seems in contrast with post #1150, where Lucian says that the ports on J9 can be used for sample rate indication.
Infact, I thought that the ports L1-L6 on J9 were meant to drive leds indicating the sampling frequency.

Last edited by Sandor; 29th September 2012 at 10:50 PM.
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Old 29th September 2012, 11:52 PM   #1278
wlowes is offline wlowes  Canada
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Paul
Viewing this post, I see what you mean.

Then I look to Lorien to explain what exactly is on the pins at J9.
Walter
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Old 30th September 2012, 09:24 AM   #1279
Corpius is offline Corpius  Netherlands
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Old 30th September 2012, 10:47 AM   #1280
Lorien is offline Lorien
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Quote:
Originally Posted by Sandor View Post
[...] Lucian says that the ports on J9 can be used for sample rate indication.
Infact, I thought that the ports L1-L6 on J9 were meant to drive leds indicating the sampling frequency.
Yes, you are right! Those signals are mainly used to drive LEDs and indicate current sample rate (or different states in case of L7 and L8):
L1 = 44.1 kHz
L2 = 48 kHz
L3 = 88.2 kHz
L4 = 96 kHz
L5 = 176.4 kHz
L6 = 192 kHz
L7 = Host Active (WaveIO board plugged in and detected by host)
L8 = Audio Streaming (Enable when there's streaming over USB)

I hope it helps,
L
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