No, looks good to me.
So with this circuit, I could get the value from 0-1023 for the loudness of the right channel from the audio jack?
Yes, providing there is no DC component to the output from the amplifier. If there is you need a seriese capacitor between the diode and the jack.Yes you do need to connect the ground of a jack, any voltage is measured as a difference between two points, without the ground connection you don't have two points.Yes another circuit will work just the same.
Do you mean the audio jack of the USB DAC?
I am not sure about what is DC component.
Please supply a link to this.https://forum.allaboutcircuits.com/threads/what-is-the-dc-component.7210/
Thanks. I think it is the French translation that ends up using words that we would not use in English to describe things.
For the same decoding chip, different filter circuit is one of the biggest influence. Bluebird uses its own independent development of filter circuit. Make sound more natural,clean,downy.Specification:Size: 22cm*5cm*12.5cmWeight: 1.2KgSupport the sampling rate: Coaxial 24B 192K Optical fiber 24B 192K USB 24B 96K (XP,WIN7, WIN8. MAC driving free ,support mobile OTG decoding)Decoding chip: CS4398+CS8416+SA9023Headphone power: 460MW/32ohmsInput: USB/Coaxial/Optical or Analog input, Use back panel's switch button to switch betweenUSB/Coaxial/Optical input and Analog inputOutput: 3.5jack headphone output on back panel, directly drived by decoder chip modul 6.5jack headphone output on front panel, drived by headphone amplification extend card analog outputNotice :Look at picture of back part Back panel left switcher is used to switch between USB/Coaxial/Optical input and Analog inputNC to reserve space. This interface without any function.COA RCA socket for external coaxial input interface. Support maximum 24 b 192 k sampling rate digital signal inputOPT for external optical fiber input interface.Support maximum 24 b 192 k sampling rate digital signal inputUSB to the computer USB port.Computer signal can be directly converted into a maximum 24 b 96 k input to decoding part.To optimize the output.The decoder part's op-amps use three American big SNE5532 OPA. OPA adopts the plug type design you can freely change. Ascension decoder sound quality. Decoder op-amp adopts dual op-amp. So when you buy upgrade op-amp, pay attention to buy dual op-ampHeadphone amplifier card use two American SNE5534 single op-amp, It's not same with decoding part .You should pay attention to. The op-amp is still adopted plug type design.The machine adopts full shield square transformer. Reduce interference. Improve signal-to-noise ratio.
But the highest volume value is only about 220
when left and right channels send signal at the same time, the volume from the right channel is even lower.
But the highest volume value is only about 220,