Ceevee, you talkin' ta me?? If so, please be specific regarding what I should've read. Yes, I've read some of this huge thread. I've also already spent a lot of time looking online for parts that fit my description.
I'll be very happy if it turns out this thread has my answer already. Thanks
I'll be very happy if it turns out this thread has my answer already. Thanks
There were hints/links to versions with opamp or without any extra stuff like input relays.
Besides this I would like to read comments in standard English and not in a slang-similar version: members without English as mother language should be able to concentrate on the technical content and not with translation....
Besides this I would like to read comments in standard English and not in a slang-similar version: members without English as mother language should be able to concentrate on the technical content and not with translation....
I thought Spiri was interested in any application of the Muses that may have significant demand. He can clarify if he's only interested in more complex projects / complete components than what he's done already.
Hints/Links about implementing what I described isn't on point. If you mean something on sale, again, I have searched extensively. I wasn't able to find anything that matches my description. I've looked at the components mentioned in recent posts. I don't think this back and forth is very productive without a pointer to the content you have in mind.
Finally, I wouldn't use any confusing language in a technical conversation. I don't think there's a need to gut posts of personality when it's not something with significant content.
Hints/Links about implementing what I described isn't on point. If you mean something on sale, again, I have searched extensively. I wasn't able to find anything that matches my description. I've looked at the components mentioned in recent posts. I don't think this back and forth is very productive without a pointer to the content you have in mind.
Finally, I wouldn't use any confusing language in a technical conversation. I don't think there's a need to gut posts of personality when it's not something with significant content.
opamp avoidance, dual mono benefit?
Okay, I don't know how I missed the AA volume modules. I had looked at either their site or at least their ebay listings (and thought it showed everything). I've got a couple tech questions in light of their offering.
1. Their board includes an opamp. Previous postings here have stated that an opamp is not required. I have a feeling this is a point I need to return to this once I understand the circuit's operation better. This could be a reason to pass on their product unless it would be practical to remove the part from the signal path.
2. In light of this components expense, I've got to consider the benefit of dual mono. I'm expecting mosty people to say there's not much reason to bother with it.
Chi (yes I attempt to research before posting) Dave
Okay, I don't know how I missed the AA volume modules. I had looked at either their site or at least their ebay listings (and thought it showed everything). I've got a couple tech questions in light of their offering.
1. Their board includes an opamp. Previous postings here have stated that an opamp is not required. I have a feeling this is a point I need to return to this once I understand the circuit's operation better. This could be a reason to pass on their product unless it would be practical to remove the part from the signal path.
2. In light of this components expense, I've got to consider the benefit of dual mono. I'm expecting mosty people to say there's not much reason to bother with it.
Chi (yes I attempt to research before posting) Dave
Hi,
To reply only now seems much more appropriate...The Muses Volume chip permits you to use only the "pot" ladder for volume control without using the output to the opamp buffer.
This is how Passlabs uses it in the XP30 for example.
You may also add a trimmer pot in parallel to it so as to adjust precisely the value ( varies from 14k to 20k ) so that both channels are exactly the same.
If the PCB you buy has the opamp...no worries just ignore it and use the "pot" wiper output instead.
Go to Spiri's site AKOUO and download the input/volume controller manual ...it will give you some insight, his application is very well done.
Hope this helps.
😀😎
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Balanced Dual Mono is no problem with the muses. With the possibility to set different addresses, up to eight muses are working on the same bus. Our controller supporting two muses for the balance control.
If you do not need a balance control, you can connect the bus of 2 muses in parallel and both are provided with the same attenuation value.
__________________
Is there any info on the volume pot in the new Xs preamp from Pass labs? It would be interesting to see if Wayne found a better solution!
I see no reason why Wayne should not have used it because of best results in his XP30.
You know: "Never change a winning team...."
You know: "Never change a winning team...."
Well, his previous designs used other solutions and weren't considered bad sounding. There was a lot of research for the Xs and volume control was certainly part of that research.
Na....the UGS module is completely different from XP30 ( UGS 6 )...that was the main change.
Also Power supply is an evolution of the one on XP30.
IMHO with exception of added Servo Loop modules from XP30 and Xs have an identical technical basis.
Like a superb cook Wayne has obviously seasoned some ingredients like different VAS-devices, higher basic currents, no SMD-devices, lower impedances, new board material etc. to get a better tasting food….
Like a superb cook Wayne has obviously seasoned some ingredients like different VAS-devices, higher basic currents, no SMD-devices, lower impedances, new board material etc. to get a better tasting food….
My Experience with MUSES Volume Control from AA
Hi Guys!
I read this thread diligently, and enjoy your highly sophisticated discussion.
Let me also put my little contribution in.
I managed to get an Input Selector and MUSES Volume control board from the AcademyAudio website. I originally planned to use it with Arduino-based controller, but a week later found an IR remote controlled MCU controller board on the same site.
I built a simple power supply and put both boards to work with a pair of 250W IcePower class D amp modules that were working in my system for the last year.
I flipped the switch... and did not like the sound at all. Huge disappointment. Shallow sound stage, artificial bass, way too bright sibilants... It was Saturday night, and no use to call the company. I decided to read the manual that came with the board. The company suggests to give a 100hr break-in period before auditioning the product. Frustrated I put my SACD Player in a loop, and left the listening room... Next morning, about 10 hours later, I entered the room with a heavy heart. To my great surprise, my system sounded like never before. Dark background, well defined sound stage, natural voices - I had it all with a venerable Revox B252 lent to me by my hardcore audiophile friend. But I've never heard such a clean and effortless bass from my vintage Klipsch T10WO speakers. The entire presentation got more fluid, silky and open. I could hear subtle noises, cracks and tinkles I never suspected existed on my favorite Bill Evans Trio album (Verve VE-2-2509). I discovered new airy decays following the percussion passages.
From my prior experience, bass improvement is unexplainably associated with reduced distortions. After three weeks enjoying my revitalized sound system I finally resorted to disconnect the MUSES module from it, and ran some tests.
You may find a complete test report generated by RMAA system in the attachment. The numbers are quite impressive as is. I would like to add just a few comments. A fence of higher order harmonics (all below 0.0001%!) may be associated with the OPA2604 crossover distortions. A crosstalk rise with frequency is most likely a function of paired interconnect cables.
I apologize for such a long post, but I felt obliged to share my experience with you.
Hi Guys!
I read this thread diligently, and enjoy your highly sophisticated discussion.
Let me also put my little contribution in.
I managed to get an Input Selector and MUSES Volume control board from the AcademyAudio website. I originally planned to use it with Arduino-based controller, but a week later found an IR remote controlled MCU controller board on the same site.
I built a simple power supply and put both boards to work with a pair of 250W IcePower class D amp modules that were working in my system for the last year.
I flipped the switch... and did not like the sound at all. Huge disappointment. Shallow sound stage, artificial bass, way too bright sibilants... It was Saturday night, and no use to call the company. I decided to read the manual that came with the board. The company suggests to give a 100hr break-in period before auditioning the product. Frustrated I put my SACD Player in a loop, and left the listening room... Next morning, about 10 hours later, I entered the room with a heavy heart. To my great surprise, my system sounded like never before. Dark background, well defined sound stage, natural voices - I had it all with a venerable Revox B252 lent to me by my hardcore audiophile friend. But I've never heard such a clean and effortless bass from my vintage Klipsch T10WO speakers. The entire presentation got more fluid, silky and open. I could hear subtle noises, cracks and tinkles I never suspected existed on my favorite Bill Evans Trio album (Verve VE-2-2509). I discovered new airy decays following the percussion passages.
From my prior experience, bass improvement is unexplainably associated with reduced distortions. After three weeks enjoying my revitalized sound system I finally resorted to disconnect the MUSES module from it, and ran some tests.
You may find a complete test report generated by RMAA system in the attachment. The numbers are quite impressive as is. I would like to add just a few comments. A fence of higher order harmonics (all below 0.0001%!) may be associated with the OPA2604 crossover distortions. A crosstalk rise with frequency is most likely a function of paired interconnect cables.
I apologize for such a long post, but I felt obliged to share my experience with you.
Thank you for reporting this.
Your listening results agree with those from Stefanoo, your measurements with these from spiri and XP30-review.
Therefore the message for the MUSES72320 must be:
"Plug it into your system, burn it in for lots of hours, then enjoy!"
Your listening results agree with those from Stefanoo, your measurements with these from spiri and XP30-review.
Therefore the message for the MUSES72320 must be:
"Plug it into your system, burn it in for lots of hours, then enjoy!"
What equipment did you use to get these measurements? And how do these measurements compare to loopback using the same equipment?
I have used a Creative professional outboard sound card E-MU 0204 USB and an RMAA Pro ver 6.2.5. The loopback performance of the card with one of the interconnect cables is attached to this post.
It looks like this setup may benefit from a metal shielding enclosure to reduce AC line associated noise components.
It looks like this setup may benefit from a metal shielding enclosure to reduce AC line associated noise components.
yes, this matched exactly my review!! If you had read it you would have probably patiently waited some hours ahahahahah 🙄
I am glad you like it too...it is a beautiful controller...and that is why I keep saying to people here to just get a set of board from spiri and not worry about anything else other than enjoy the music!
The boars is so cheap and the improvement brought by his board so great that it is no brainer to me!!! 😱
😎