If you allready have an mcu for volume control than you no need to rebuild Levetop mcu, just use mcu binary from attachment and make your own UI trought ui editor. Levetop LT268 have inside ic an mcu, and mcu is responsible for comunication trought uart to an external mcu, for example when you move knob it produce something trought uart which you need to catch by an external mcu. Also you can send comands to knob via aurt for example to change ui things. But internal mcu can work on your own way, for example if you modify mcu source code, but problem is you can't get mcu code, its propretiary and private, you should ask person from Aliexpres before you buy knob and if you are lucky you will get them! Ui is programable trought UI_Editor-II_V2.30, and you will need also to program your external mcu to catch all that uart commands, not very flexible! But it work very good when you figure out all the things. Making ui trought UI_Editor-II_V2.30 is not that hard, just folow datasheet -> https://www.levetop.cn/uploadfiles/...b61f5Fzf5FzSR&file=UI_Editor-II_ENG_V2.10.pdf . Inside ui editor you can see emulator and all the uart bytes structure your ui produce.
Here is mcu binary if you need it. To program knob use LT_Vcom_GUI_V2.6-2021-10-20
Here is mcu binary if you need it. To program knob use LT_Vcom_GUI_V2.6-2021-10-20
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Think also about this one https://www.aliexpress.com/item/1005007261678442.html I will try them when I get some free time for new knob, want something more flexible than Levetop, even I will think to change internal pcb with my owm stm32 based and add more pins in case that one do not have what I need. : )
Done! Those who want to build, here you go -> https://www.diyaudio.com/community/threads/isolated-dsc2-dac.418617/
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Hi guys ....
DSC3
I have a one question. When im playing DSD256 with ADSM7EC + 512fs I hear a noise comming from speakers? .... without 512fs noise is gone ... That will be a problem with my PC ?
DSC3
I have a one question. When im playing DSD256 with ADSM7EC + 512fs I hear a noise comming from speakers? .... without 512fs noise is gone ... That will be a problem with my PC ?
buzzing noise with music? you can try to add some delay in the mclk with 1K for R12, I had the issue with Amanero combo768 but not with BBB.
Today I measured the new modulator AHM7EC5L at DSD1024. Actually it performs very well! I was too lazy to save results but be assured that it compares very wel with AMSDM7EC 512+fs modulators on the DSC2 type DAC. Albeit that the noise floor increases for higher frequencies up to -120dB. But if you listen to speakers and not headphones, that noise level is not a problem and you can use HQPlayer's own volume control.
Resistor: https://www.digikey.jp/htmldatasheets/production/117228/0/0/2/nomc16032001at1.html
I2S/DSD output of Amanero is CMOS33, I will use Nexperia's 74LVCxxx. It is suitable for 3.3V and I see it has double the output current, and the bandwidth is also significantly higher.
I2S/DSD output of Amanero is CMOS33, I will use Nexperia's 74LVCxxx. It is suitable for 3.3V and I see it has double the output current, and the bandwidth is also significantly higher.
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Your link to the resistor does not confirm whether it is passivated nochrome or tantalum nitride.
If the shift resistor is not a max 5.5 type, you will have less performance and less output level.
The shift resistors have been tested extensively and all sound different, see earlier stages of development in this topic.
The original DSC1 design used deliberatedly 74AHCT595.
I would advice against your choice.
If the shift resistor is not a max 5.5 type, you will have less performance and less output level.
The shift resistors have been tested extensively and all sound different, see earlier stages of development in this topic.
The original DSC1 design used deliberatedly 74AHCT595.
I would advice against your choice.
Sorry, I mean shift register, not resistor. The 74AHCT595D works with max 5.5V power supply (so you are able to get output level of 5V with the right supply) and accepts 3.3V input level. That is what you need.
With respect to the resistor, see the note in the datasheet that tantalum nitride has to be specifically consulted with the manufacturer. If you don't do that, you will get passivated nichrome which does not sound as good as tantalum nitride.
With respect to the resistor, see the note in the datasheet that tantalum nitride has to be specifically consulted with the manufacturer. If you don't do that, you will get passivated nichrome which does not sound as good as tantalum nitride.
Be careful:
If Vcc=3.3, and signals are 3.3v - LVC is good, AHCT not recommended.
If Vcc=5v and signals are 5v - both can be used.
If Vcc=5v and signals are 3.3v - AHCT is good, LVC not recommended.
Alex.
Yes, Pavel in the past already replied to chientechnical: https://www.diyaudio.com/community/threads/signalyst-dsc1.254935/post-5866682
This means substantial loss of output level.
Other possibility is 74LVC8T595.
It can be used with separate power supply for in- and output. So you can use 3.3V for the input VCC(A) and 5.5V for the output VCC(B).
This means substantial loss of output level.
Other possibility is 74LVC8T595.
It can be used with separate power supply for in- and output. So you can use 3.3V for the input VCC(A) and 5.5V for the output VCC(B).