Don't buy a Eitr. It won't fix your problem.
But what if my problem is caused by the Gen 2 USB board in the Modi? In that case, wouldn't the Eitr solve my problem?
Is your computer running Windows or something else. I or others can step by step tell you how to send a signal through the Schitt, back into the analog input of your onboard sound card on the computer. Then you can run a sweep or some white noise and see if it has flat response. You can run a test tone thru it and see if it has excessive distortion. I haven't used RMAA in too long to remember the details. Feeding a signal to your Schitt and the output of that into the analog input of your on board sound card should allow you to run the full RMAA test signals.
I am running WIndows 10. That could be great and I appreciate the help, but I might be returning or exchanging the Modi (as I discuss in more detail below). The thing is, what if we run the test and then it says nothing is wrong with my Modi? My Modi would still sound bad with my system anyway...so maybe I need something that's not a Modi?
Your expectations are off. You don't need to spend a lot on a DAC to get good sound from it. Current technology is at the point where even cheap DACs like your onboard Realtek are usually very close to audibly transparent unless there is an obvouls problem like interference. If there are improvements to be had, they are very subtle. As for the speakers, the LSR305 is technically better than your XD-550 but I think you're expecting too much. From what I can tell they are similar sized speakers, and accounting for inflation your old speakers were actually more expensive. The XD-550 does have other features which the LSR305 doesn't which complicates the comparison, but I expect they are still a similar class of speaker to each other. It's not like you're upgrading from small computer speakers to a full tower system.
So from what I can tell, you spent a total of $1200 on the DAC which won't give you much over your onboard sound, plus the headphone amp which does nothing at all to improve the sound quality of the speaker setup, plus the speakers themselves which aren't a huge upgrade over what you had, and your expectation is that it will sound 4 times better.
I bought the amp because I needed a volume knob since the Modi doesn't have one. And because it gives me a way to use headphones (which makes it worth the $50 above the Schiit SYS).
You are probably right that my expectations are way off. When it comes to audio, I have absolutely no idea what I'm doing. However, my expectations seemed very reasonable before I saw your post and the other similar posts in this thread. Before I bought the stuff, I tried to do my due diligence by reading tons of reviews and user opinions about what are the best soundcards or external DAC/amps, and also what are the best speakers in the $300 price range. During that research, I saw tons of universal acclaim for the Modi Multibit (and Schiit products in general) and the LSR305s. I've seen many people say of the LSR305s and of the Modi Multibit that they provide outstanding, remarkable clarity (but they definitely don't on my system). Yet now you and others in this thread seem to be telling me that the products I bought aren't that great? So what I heard during my research and what I think I'm hearing now seem to be conflicting messages?
More observations:
1. Today I heard a "popping" sound coming through my speakers...it's not a crackling kind of sound...rather, it sounds like a cork popping out of a bottle in a cartoon. I used to hear that exact same sound at sporadic intervals before I installed the Schiit gear. I had assumed that that sound occurred due to electrical interference inside my computer case. But apparently that's not the cause? What is the cause? Why does it still happen with an external DAC/amp? Is this related to why my sound does not sound good?
2. Similarly, when I plug my 598 Cs headphones into my Magni 3, I sometimes experiences another problem that I also used to experience when I plugged those headphones directly into my onboard Realtek. The problem is, I feel a wave of vibrations shaking across the headphones, even when no sound is playing. When this happens, it sounds a little bit like if you hold a seashell to your ear (only this sound is weaker than that). While that sensation is happening, the headphones become extremely uncomfortable to wear. What is that sensation? I used to assume that it too was caused by electrical interference inside my case, but apparently it's not? Why does that still happen with an external DAC/amp? Is this related to why my sound does not sound good?
3. When I searched the web for possible solutions to my sound problems, I found a program called LatencyMon. When I ran it, it said my computer might have trouble running audio properly, and it said my machine was having buffer underruns. However, the program's suggested solutions were useless. It told me to solve the problem my optimizing my OS's power settings, which already were optimized, and by updating my BIOS even though it was, and by telling my BIOS not to throttle my CPU, which I don't think it was set to do. Are these buffer underruns actually related to my sound problem, or not? If so, how do I really fix them?
4. I'm still within the 15 day window to return or exchange my Modi if I so choose. I am tempted to exercise that option and take on more debt and exchange it for the Bifrost Multibit, in hopes that the Gen 5 USB of that and/or the different power structure compared to the Modi Multibit will cause the Bifrost not to sound like crap with my system (in contrast to how the Modi Multibit
does sound like crap with my system). I really hate to take on more debt, but what I would hate even more than that is to be stuck with a DAC that isn't giving me good sound. However, I'm also mindful of the advice I was given earlier that an Eitr won't solve my problem, and so maybe a Gen 5 USB board in the Bifrost won't either.
But if a Bifrost won't get my system sounding good, then what would? I expect the ideal answer would be "new speakers," but this rabbit hole has already been ravaging my budget way too much, so for that reason new speakers probably aren't in the cards right now. I realize I was given advice to look for secondhand speakers in Goodwill, but in my city Goodwill jumped ship a while ago. Although even if they didn't, I don't have the knowledge which would enable me to judge whether a second-hand speaker is good or not.
In simpler terms, right now my main goal is to find the least expensive way to make my audio stop sounding like crap. How can I accomplish that?