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Old 26th May 2012, 09:37 PM   #1771
Russ White is offline Russ White  United States
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Very likely your DAC was simply running out of current at the higher sample rates. You need to remeber that the DAC consumes more current the higher the sample rate goes.
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Old 26th May 2012, 09:40 PM   #1772
MisterRogers is offline MisterRogers  United States
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Thanks for chiming in Russ. Brian suggested as much in an email. I'm using an LCDPS to power the DAC. How would you suggest I check, or increase the current?
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Old 26th May 2012, 10:00 PM   #1773
Russ White is offline Russ White  United States
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Lower the resistor value at the CRC
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Old 7th July 2012, 04:14 PM   #1774
Russ White is offline Russ White  United States
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I would like some feedback from some of you folks here:

http://www.diyaudio.com/forums/twist...ml#post3084650

Cheers!
Russ
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Old 26th July 2012, 01:54 AM   #1775
Russ White is offline Russ White  United States
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Quad 2:1 BUS MUX/DEMUX...

Check it out

http://www.diyaudio.com/forums/twist...tter-name.html
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Old 26th July 2012, 06:20 AM   #1776
Nelson Bass is offline Nelson Bass  Denmark
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Great!
What is the status for the XMOS USB-interface?
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Old 26th July 2012, 01:18 PM   #1777
Duffy Moon is offline Duffy Moon  United Kingdom
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Quote:
Originally Posted by Nelson Bass View Post
Great!
What is the status for the XMOS USB-interface?
Also - AC2?
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Old 26th July 2012, 01:22 PM   #1778
Ared is offline Ared  Hungary
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Hey Guys! I don't have plans to upgrade my B2 with tridents at this time, but I'm wondering if in like 2 years I change my mind, what are the chances of them being still available?
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Old 28th July 2012, 02:18 PM   #1779
barrows is offline barrows
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Default tech ?

Recently, I am trying a nCore class D amp with my B-II/Legato (direct connection, balanced). For the first time, the noise floor of the amp is below that of the DAC.
Now I find that there is a clakkity/clak sounding floor of my DAC (sounds kind of like a train track sound). Admittedly, this is way down in level, but I think the floor should be smoother than this?
I put the B-II board in mute, and the sound goes away to reveal a smooth, and very low, noise floor of the Legato (nice Russ).
Before I go on, perhaps chasing wild geese, is a spiky noise floor normal for the B-II, or should I continue to investigate further to try and eliminate it?
Thanks for any insight.
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Old 28th July 2012, 03:03 PM   #1780
Russ White is offline Russ White  United States
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A sound like that sounds like it could EMI or some form of HF oscilation (after the IV). That certainly should not actually be coming from the DAC unless for some reason it is enbedded in the digital signal itself, which is possible. It also could be that your amp is very sensitive to HF, and you may need more aggressive low pass filtering. Some class D amps are very prone to this.
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