I'm pretty picky about audio quality. I can hear a slushiness in cymbals in most MP3s, as well as muddy sub-bass sounds. Bluetooth sounds really shoddy to me no matter what.
Headphones are almost always the best way to get the best experience. Even cheap ones can deliver better clarity and usually even better bass than the best TV speakers.
I definitely prefer almost anything over internal TV speakers. Sega Genesis, SNES and later consoles have some excellent tunes that benefit from having a mid-to-low end boost. The Genesis FM Synth can produce some great low-end bass that needs to be heard through a good sound system to be fully appreciated.
If you can hear anything when you crank the volume on your sound system while no sound is being played, you need to fix that problem - it's shielding, faulty hardware or other interference. That's why you want to improve your audio setup. Any audio coming out of the back of a TV is likely to have some signal noise. This is the main reason to use external speakers from a console.
For the longest time I only ever used Altec Lansing PC 2.1 computer speakers that cost less than $75 - I've ended up buying 4 different models of Altec Lansing 2.1 speakers over the years and still consider them to be pretty decent. Just having a properly boxed and piped lower-end speaker, and properly wide-separated stereo makes a world of difference compared to any TV's built-in speakers. The first time I hooked a set to my Genesis I was blown away.
Having gone through too-many revisions over many years, the clarity from my current setup is as good as I want to get. I gave my dad the hardware from my bigger, louder setup in trade for clarity and almost 0 signal to noise ratio at any volume level.
My current setup:
Most SD consoles -> 2X Keene SCART Switch -> X-RGB Framemeister -> Monoprice HDX-401TA -> Optical input of Harman Kardon AVR 340 -> Bose Acoustimass 10 speakers.
Newer HD systems with Optical output built-in are connected directly to the AVR 340.
Sega Genesis/CD/32x is connected directly to the AVR 340 via analog.
PS2 is connected to Plasma directly through Component video, and the AVR 320 through optical for audio (no amount of modding can get proper 240P scanlines and 480P for the others for any substantial amount of games. Waste of too much time. I emulate when necessary).
PS3 is connected directly to the Plasma via HDMI, and the AVR340 via Optical (does not play well with any video hardware).
PC is running a Sound Blaster Z into optical input of the AVR 340.
All HDMI systems except PS3 run through Monoprice HDX-401TA with optical breakout to the AVR 340.
This setup I built is very specifically set up so I can be playing any game - even DMG Alleyway (Game Boy launch title), and it's filling my entire field of vision, the video has nothing that would make me stop and try to tweak it for something better, and the audio can be cranked and enhanced with a preset to make it fill the room with clear sound.
Mission accomplished - yet there's much to be done.
A schematic would simplify explaining the audio setup. I haven't built one for years because the situation changes too often. That's also the reason I don't have a dedicated topic on this forum for my game room. I keep planning to tidy my wires up, but it's seriously a
Serial Experiments Lain endgame scene all-
the-
time. Utilitarian over aesthetics is not my goal, just the solution to play all the games faster and easier. At least it impresses my friends when they come over to game. I'm always amazed that everything works when I go and add something to the rats-nest.
Having a high-capacity Logitech Harmony remote is very useful after things are no-longer connected directly and switches are involved.
Playing Shadow of the Colossus with the volume cranked on a 5.1 surround system with a large subwoofer is really cool because you can feel them. My niece and I sometimes borrow my father's den for a few boss battles since I gave him my 12" subwoofer coffee-table thingy and hooked up his 80's Celestion surround speakers. Even clubs don't make that much bass anymore as it's become unpopular. Still, It's so cool to feel the battle. The neighbours haven't complained, but I watched a couple walk out to see what was happening as we took on some colossi.
I think the quality of the sound has more to do with the speakers and amp being used than anything else. As far as digital vs analog goes, I've tried to find a difference between good thick analog cables and digital audio and have not been able to detect any difference on the consoles and other systems I tried it on as far as stereo audio goes.
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Granted, I have not heard any digital-audio-modded consoles, so i'm also interested if such a mod makes any large difference. I can certainly see the benefit if your console is far away from your audio receiver.
Handhelds are another thing entirely - they often have badly shielded audio hardware or in Game Boy Mono all the way through the GBA's life, the CPU power-saving bleeds into the audio output - you can actually hear the CPU working as white noise. In those cases, I'd definitely recommend a prosound mod if you value the audio fidelity.
I've been fortunate to get a couple of high-end 5.1 AV receivers for incredible prices simply because they didn't have HDMI input or output.
The simple fix is a HDMI switch with digital audio breakout. I'm using this
Monoprice one.
The only other thing I can add here is that there's a definite audio quality difference between the "
High Definition Graphics" Sega Genesis and the later models. I really didn't know until a few years ago that the "Seeegaaaa!" bootup could sound clear on hardware. After hearing it for myself, I can't believe I never noticed the difference before considering a couple of my friends had the better model, and I always cranked the volume when Chemical Plant Zone came on.
Re: the comparison video in the above link - I've never heard a genesis sound *that* bad before. I think that guy's system needs a cap replacement or something. That CDX is broken.