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Old 13th March 2019, 11:49 AM   #1271
ppy is offline ppy  Russian Federation
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https://item.taobao.com/item.htm?spm...d=577195384418
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Old 13th March 2019, 11:49 AM   #1272
merlin el mago is offline merlin el mago  Europe
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Thanks again ppy.
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Old 13th March 2019, 12:26 PM   #1273
eziitis is offline eziitis
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Quote:
Originally Posted by altor View Post
You miss the word "this" in the statement:

"The difference in sound between <this> melf and tantalum is not big".

without this word, the statement has a completely different meaning.
c'mon Alex, everybody understood, what was meant in contrast the aliexpress link to those nice trafos had an unforgettable description indeed:

"... аудио трансформатор предварительно ввода крупного рогатого скота одного конца..."

so, nobody is perfect, even google translate. sorry for this OT, but the Russian sentence suggests, there will be "preliminary entering of a bunch of cows from one side.. OMG!
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Old 14th March 2019, 06:34 AM   #1274
ppy is offline ppy  Russian Federation
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In Russian, this phrase sounds no less absurd.
It was an automatic translation from Chinese to Russian.
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Old 14th March 2019, 06:55 AM   #1275
altor is offline altor  Israel
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No.
It was automatic translation from Chinese to English, at first.
After that - automatic translation from English to Russian
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Regards, Alex
www.altor.co
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Old 14th March 2019, 08:26 AM   #1276
christian.lenci is offline christian.lenci  Italy
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I just finished building a DSC2 board.
I was experiencing noise in the left channel; after investigating I found that touching the clock lines (outputs of U11 and U22) with a finger or an oscilloscope probe, I could make the noise disappear in the noisy channel or appear in che clean channel. I added 4x 220R terminations to ground across pins 8-11 of U15, U19, U26, U30 (74AHCT595), that is at the end of the 4 clock tracks. The problem disappeared and the board is not sensitive anymore to external contact on these tracks.
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Old 14th March 2019, 08:34 AM   #1277
ppy is offline ppy  Russian Federation
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What is your i2S signal source?
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Old 14th March 2019, 08:36 AM   #1278
christian.lenci is offline christian.lenci  Italy
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amanero with stock FW, DSD256
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Old 14th March 2019, 09:06 AM   #1279
ppy is offline ppy  Russian Federation
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Hmm ... This problem used to be when using only Xmos and DSC2.5-2.6 versions.
The fact is that the Xmos MCLK phase is slightly different from Amanero. And apparently the registers AHCT595 were in a metastable state.
You also slightly shifted the MCLK phase with resistors.
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Old 14th March 2019, 09:34 AM   #1280
christian.lenci is offline christian.lenci  Italy
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It seems to me that in my case it was a simple problem of reflection along the clock line.
The sensitivity to external contact on the trace was almost zero at the output of U11/U22, while it was very high close to the last 595's of the line (U15, U19, U26, U30).

Do you think the phase shift could be a problem?
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