Muses Volume

[meldano]

Yes, include GND

 

[sunlai]

Hi @meldano,
Could you please explain to me how in Muses72323 an unbalanced signal is converted into a balanced signal?
Regards

 

[meldano]

Use one muses for one channel.

 

[sunlai]

Use one muses for one channel.

Yes, I know, but I'm wonder how exactly does this process work in the Muses chip itself.

 

[meldano]

I don’t understand your question.
See the chip as a dual channel pot.
One channel for positive, and the other for the negative phase…

 

[EUVL]

"Could you please explain to me how in Muses72323 an unbalanced signal is converted into a balanced signal?"

The Muses is just the equivalent to a 2-gang pot.

It CANNOT convert SE signal to balanced on its own.
For that you need a SE to BAL converter first.
The simplest of these is a capacitor coupled phase splitter.
https://wiki.analog.com/university/courses/alm1k/alm-lab-phase-split

After you have converted to BAL, you can then use the Muses to attenuate the BAL signal.
Just as you can, by using a normal 2-gang pot.


Patrick

 

[sunlai]

"Could you please explain to me how in Muses72323 an unbalanced signal is converted into a balanced signal?"

The Muses is just the equivalent to a 2-gang pot.

It CANNOT convert SE signal to balanced on its own.
For that you need a SE to BAL converter first.
The simplest of these is a capacitor coupled phase splitter.
https://wiki.analog.com/university/courses/alm1k/alm-lab-phase-split

After you have converted to BAL, you can then use the Muses to attenuate the BAL signal.
Just as you can, by using a normal 2-gang pot.


Patrick

But according to meldano documentation, such an option like on the picture is possible, even meldano itself confirmed it in the post #360.

 

[starcat]

But according to meldano documentation, such an option like on the picture is possible, even meldano itself confirmed it in the post #360.

Could you please stop it and listen to what others are telling you? The Muses 72323 is just a two channel volume controller and not a converter.

 

[Chris In Milwaukee]

You use two Muses chips and PCBs, one for left channel +/- and another for right channel +/-. In that configuration it’s not a SE-to-bal conversion. It generally requires a balanced input to get a balanced output. My build thread shows a balanced creation. Maybe it will clear things up for you.

https://www.diyaudio.com/community/...c-volume-control-build-from-wisconsin.370993/

 

[sunlai]

Sorry for the confusion.

 

[EUVL]

The link to the converter I posted above is not low distortion.

You can do it with IC's, or discrete :
http://www.thatcorp.com/1600-series_Balanced_Line_Driver_ICs.shtml
https://www.diyaudio.com/community/threads/mini-dcaav-with-dayton-nd91.249372/post-4559002

https://www.diyaudio.com/community/threads/necx-and-nesx-single-ended-to-balanced-converters.329767/
https://www.diyaudio.com/community/...orch-preamplifier-part-ii.146693/post-5270193


Patrick

 

[Bensen]

hi, I purchased the controller from Meldano a while ago. In the last months I designed the pcb’s based on this controller in the way they suited me best. Two flat cables connect the main board to the relais board and operating board mount on the front panel.

The pcb’s are assembled as minimum as possible in order to test all functionalities.
After cleaning the pcb’s and connecting everything. I followed Meldano instructions and.... I was able to control all. The 0,25dB steps are really small, 1dB suited me best.
I used a 24steps encoder.

Now I can complete the PCB’s and redraw the operating pcb according frontpanel design. And build everything in an eclosure with my Blowtorch clone preamp.

THANKS Meldano, to make this design and controller available for us!