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Hi Russ. I have just ordered Dual mono Opus/IVY combo with Metronome. I have browsed through the datasheets for the chips and of course there is a lot to learn to a newbie. I am going to put both oversampling selector and upsampling selector on the front panel, just to listen and trying to get some experience with the different combos. The question, however is how you, Russ, evaluated the settings to come up with your recommended ones. (I really would like to have both the wm8804 and wm8741 in software mode, but too much to read, so I stick to hardware mode). I also would like you to tell me how you have understood the oversampling settings(wm8741). In a simple way? Please..  What does low, medium and high mean? I would expect something like 4x, 8x and so on. I guess I need to grasp what fs really mean... cheers Øivind Norway
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Hello,
Basically , in this case, the oversampling setting on the WM8741 relates directly to incoming sample rate. For example low is 32-48khz, medium is from there up to 96khz, high is up to 192khz.
You need to setup the DAC so it can apply the correct filter for the sample frequency you plan to use.
The DAC will not even work correctly for instance if you have it setup for the low oversampling rate and you feed it 192khz signal.
Once you know what sample rate you will be using, then you simply choose a filter response you want to try. :)
Personally I have found response #2 seems to be very good at all sample rates, but this is likely to be something subjective, or application dependent.
I hope that helps.
Cheers!
Russ
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Hello
Most of my music is sampled from 44.1/16 to 96/24
In my Dac setup, Opus dual mono with Metronome I have set the upsampling to 96kHz and the Opus' oversmpling to medium, filter response to #2 and as I mention yesterday I am very happy with the sound (dynamics seems to be without limit)
I wondered if I set the Metro to 192kHz upsampling (and adjust the Opus accordingly), would I gain anything soundwise, and is there a tradeoff? Of course, I will try it anyway, I am just asking for your personal opinion and experience :-)
Oivind
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I remember playing with this a while back and liking 96kHz more than 192kHz. This was with the WM8740 Opus, however, and I have not had a chance (time) to play with it on the WM8741 Opus, which will be different due to better digital filters. Give it a shot and tell us what you think.
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xvsop wrote:Hello
Most of my music is sampled from 44.1/16 to 96/24
In my Dac setup, Opus dual mono with Metronome I have set the upsampling to 96kHz and the Opus' oversmpling to medium, filter response to #2 and as I mention yesterday I am very happy with the sound (dynamics seems to be without limit)
I wondered if I set the Metro to 192kHz upsampling (and adjust the Opus accordingly), would I gain anything soundwise, and is there a tradeoff? Of course, I will try it anyway, I am just asking for your personal opinion and experience :-)
Oivind
The WM8741 to me sounds its best pumping out 192/24 music. :) So whatever it takes to get there in my opinion is worth it. It has a completely different digital filter than the WM8740, which was better at 96khz than 192khz. Cheers! Russ
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Thanks guys. Brian, I gave it a shot. I am not a super-human with golden ears and I have just been listening for about four hours so this is my first impessions. The music I have used in this test is 16bit/44.1kHz (ripped cd's) and 24bits/48Khz music downloaded as "studio Master" from Linnrecords. Source is Squeezecenter through Squeezebox reciever. (max 24/48). I have tested 24bit/96kHz and 24bit/192kHz, filter response #2. Since I only have "hardware control",A/B testing is difficult. So I listened to the same music with each setting two times each. In short, I agree with Russ.  Well the difference is subtle of course, but it's there. I am not a big fan of audiophile lingo, but the 192kHz setting was even less tiring than the 96kHz, which is also good. But it is the "no limits" dynamics and very low distortion I subjectively experience as the "unweiling" factor in this DAC. I have just ordered a quite good soundcard (With S/PDIF output transformer) to test higher resolution music. Until then I am just going to sit back and enjoy the purest,cleanest music in my livingroom so far.  Cheers! Oivind
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A lot more hours later listening to the DualMono Opus and a new and more revealing amp using balanced input. Just to clarify, when I use the term "less tiring" it's not a negative desription of the sound. I have experienced over the years that the most common denominator of great hifi equipment is that you can listen to it hours on end without getting tired in yours ears and head. On the other hand, gear with sweetening tricks up their sleeves may sound impressive for a while, then it starts to annoy you and it might be very difficult to pinpoint what is wrong; it is just tiring.
Back to Opus. It performs outstanding and troublefree no matter what I throw at it. Latetly I have listened to 192/24 studio master material and it brings my musical experience to another level. I do not have a state of the art audiophile super audio gear, but now I really hear subtle sounds very distinct like the key moving on a piano or the guitarist pressing the string on to the fret and so on. It's just a lot of details. I am still very happy, thank you guys for your work
Cheers!
Øivind
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Thank you!
Words like this mean a lot! I am glad you enjoy the DAC. I too find myself listening to it hours on end.
Cheers!
Russ
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