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ES9038Q2M Board
ES9038Q2M Board
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Old 29th December 2018, 01:24 AM   #3461
Markw4 is offline Markw4  United States
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Originally Posted by 888777 View Post
It is possible that I will not even increase the input frequency. I will enter through USB Amanero.
The best sound is with ultra low jitter DSD, IMHO. Upsampling is one way to reduce jitter, which is why I like to do it in hardware just before the dac chip. Conversion to DSD avoids the sound of the PCM interpolation filters which are not good enough IMHO if the dac is otherwise very well implemented. With all the mods the dac is pretty well implemented and the AK4137 approach sounds best of all the options I have tested. A low cost AK4137 board is only about $30, so I don't think price should be a limiting factor. Also, with upsampling to DSD in hardware, its fine to use any XMOS, Amanero, Amanero clone, etc. They all sound the same here, which is to say they are all really good sounding.
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Old 29th December 2018, 01:24 AM   #3462
888777 is offline 888777  Russian Federation
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I will repeat. on the schematics of the board are the same. except power supply and logic control. I analyzed the reverse sides of the boards. and figured out the schematics
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Old 29th December 2018, 01:27 AM   #3463
Markw4 is offline Markw4  United States
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Originally Posted by 888777 View Post
I analyzed the reverse sides of the boards. and figured out the schematics
Me too.
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Old 29th December 2018, 01:29 AM   #3464
888777 is offline 888777  Russian Federation
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Originally Posted by Markw4 View Post
The best sound is with ultra low jitter DSD, IMHO. Upsampling is one way to reduce jitter, which is why I like to do it in hardware just before the dac chip. Conversion to DSD avoids the sound of the PCM interpolation filters which are not good enough IMHO if the dac is otherwise very well implemented. With all the mods the dac is pretty well implemented and the AK4137 approach sounds best of all the options I have tested. A low cost AK4137 board is only about $30, so I don't think price should be a limiting factor. Also, with upsampling to DSD in hardware, its fine to use any XMOS, Amanero, Amanero clone, etc. They all sound the same here, which is to say they are all really good sounding.
I get it .. a little jitter is very good !!! Thank! Especially since I have familiar Chinese people and they can bring me with taobao directly, not through mail. It is cheap very). I will take a clone amanero. How difficult is it to realize an input frequency boost through the AK?
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Old 29th December 2018, 01:30 AM   #3465
Markw4 is offline Markw4  United States
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I'm friends with a soldering iron. but raising a foot on a small chip is quite laborious.
It is also possible to avoid lifting a foot and instead cut some small traces, then solder small 30 gauge wire wrap wire on them. I have done that too and posted pictures and instructions for doing it either way. Besides, even if pin lifting fails and the MCU is ruined, it doesn't matter. We can control the dac chip with the Arduino anyway, keeping the MCU is just for convenience.
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Old 29th December 2018, 01:31 AM   #3466
888777 is offline 888777  Russian Federation
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Me too.
And?)) everything is so bad?))
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Old 29th December 2018, 01:32 AM   #3467
Markw4 is offline Markw4  United States
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Originally Posted by 888777 View Post
How difficult is it to realize an input frequency boost through the AK?
It is no problem at all. It is designed to do that and the firmware makes it easy. You just push some buttons to configure it.
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Old 29th December 2018, 01:33 AM   #3468
888777 is offline 888777  Russian Federation
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MCU is it logic? is it not a chip of es9038q2m?
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Old 29th December 2018, 01:35 AM   #3469
Markw4 is offline Markw4  United States
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Originally Posted by 888777 View Post
MCU is it logic? is it not a chip of es9038q2m?
No, the MCU is a separate microprocessor on the dac board (or the AK4137 board). They all have one. That's where the firmware is to make the dac work.
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Old 29th December 2018, 02:22 AM   #3470
888777 is offline 888777  Russian Federation
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It is no problem at all. It is designed to do that and the firmware makes it easy. You just push some buttons to configure it.
It's good)
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