I did but I didn't want to compromise the high speed low jitter master clock by running it over multiple boards and interconnects when I didn't have to !! As it is the master clock gets distributed on the one board using the shortest possible lengths and proper impedance controlled traces 😉
cheers
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Oh it is probably more relevant than it may seem ! Small details in implementation of digital circuits can have audibly different results. ESS is especiially sensitive to implementation. If you read Sterophile reviews where they publish results of Audio Precision testing, you can get an idea which companies know what they're doing in that regard.
I have two product suggestions:
Can statistics gathered in the DSP be displayed?
Could be interesting to implement a "True peak"/+0dBFS meter according to annex 2 in
http://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.1770-4-201510-I!!PDF-E.pdf
The last one is "over the top" and just for entertainment:
http://cds.linear.com/docs/en/datasheet/238024f.pdf
Using a ADC like this the user could choose high bandwith and more noise or lower bandwith and less noise🙂
Extreme low noise can be achieved for bass applications with analog in.
Can statistics gathered in the DSP be displayed?
Could be interesting to implement a "True peak"/+0dBFS meter according to annex 2 in
http://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.1770-4-201510-I!!PDF-E.pdf
The last one is "over the top" and just for entertainment:
http://cds.linear.com/docs/en/datasheet/238024f.pdf
Using a ADC like this the user could choose high bandwith and more noise or lower bandwith and less noise🙂
Extreme low noise can be achieved for bass applications with analog in.
I have been following this thread, but got lost a bit.
Can you somehow summarize and add a percentage to the activities done on the project, please?
Not sure if it is possible for you to modify the first page write some kind of log there.
Thanks!!!
I will update my website with the latest information and specs.
Basically the main DSP board is almost ready for production. Just got to sort out the BOM as well as testing the ADC which I am in the process of ordering.
Has anyone had any experience with assembly houses in the US or china etc ? I have a few in mind but just like to get others feedback.
cheers
david
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Given the specs and mostly positive feedback, please don't ruin it by using some cheap enclosure. I still have to show it to my wife. 😉
I have a price in mind for the main DSP board but prices of components vary quite a lot depending on who you buy them from so it maybe a bit premature at this stage to announce accurate pricing.
cheers
David,
whats the current implementation?
Is the USB interface isolated and re-clocked and from there everything including and DAC and DSP run syncronously off the low jitter clock?
Also there seem to be 3 large devices on the board. Are there multiple AD-DSP chips on the board?
For testing, currently there is no isolation but the final interface board will have isolators 😉
cheers
Absolutely. It all depends on which services you need, and how closely you or someone you trust can monitor the process. It also depends, off course, on the quantities, lead times etc.
Might be worth starting a thread about that so that people in the know who aren't interested in this thread can chip in.
Stefan
Bad news regarding the Sabre ES9102 ADC. No stock available anywhere so I can't test it 🙁 Seems that the first run of boards will be earmarked for people who only want digital inputs.
Also I have started a facebook page and created a new name for the product so people can keep track of minor updates that are better posted on the facebook page instead of clogging up this forum.
https://www.facebook.com/Analog-Precision
cheers
Also I have started a facebook page and created a new name for the product so people can keep track of minor updates that are better posted on the facebook page instead of clogging up this forum.
https://www.facebook.com/Analog-Precision
cheers