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HiFi 101 training

post #1 of 10
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Hey audiophiles of OCN, I need your help. I have an interview coming up for a trainer position at my job, and part of it is a 10 minute training presentation on the topic of my choice.

I was thinking of doing a high end audio theory training, since I've observed my future boss' taste in music over shared iTunes playlists.

I'm thinking of laying it out like this:

- What's the difference between $20 headphones and $200 headphones?

- Fidelity: what is it and why does it matter?

- How high fidelity is accomplished, what are the factors?

- What is needed to maximize fidelity with each part of your set up? Eg, source, amplification, drivers, etc.

- Differences in equipment:
Why is a dac better than a sound card?
What is a soundstage?
Why use vacuum tubes?
How to choose the right setup for your tastes?

I think this all should be enough to fill up 10 minutes, easy, and it's going to be formatted like an intro to training on the subject.

If anyone has any input on what I can use to answer the above questions or thinks I missed something, feel free to pipe up. I'd love to have some collaboration with you guys! Thanks! I'll post the keynote when it's finished.
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post #2 of 10
Bump. I'd like to know, too.
 
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post #3 of 10
Why is a dac better than a sound card? dac use better parts and isolated from the pc

What is a sound-stage? makes you feel like your there in front of the stage you want it wide and deep the singer should sound like hes in front of you in the middle.

Why use vacuum tubes? tubes give it the rich sound the mids are smooth take the edge off.

How to choose the right setup for your tastes? some like rock they need it loud with good bass. some people like to here fine detail in a singers voice so they wouldn't need large woofers.
post #4 of 10
What's the difference between $20 headphones and $200 headphones?

Sound quality: generally $20 headphones have lack of details, bloated bass, muddy midrange. When you have more expensive headphones, you'll notice a big difference on clarity and details + better build quality, durability and comfort.
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post #5 of 10
i just got a pm for an interview ? jk let us know if you got the job. good luck
post #6 of 10
Quote:
Originally Posted by valtopps View Post
Why is a dac better than a sound card? dac use better parts and isolated from the pc

What is a sound-stage? makes you feel like your there in front of the stage you want it wide and deep the singer should sound like hes in front of you in the middle.

Why use vacuum tubes? tubes give it the rich sound the mids are smooth take the edge off.

How to choose the right setup for your tastes? some like rock they need it loud with good bass. some people like to here fine detail in a singers voice so they wouldn't need large woofers.
What makes tubes better for this sound? How is a realistic sound stage created?


There is so much depth in every question posed, you could just focus on one thing and spend hours talking about it, explaining the theory and technical details of it all.
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post #7 of 10
I really believe the mark is being severely missed by the posts so far. I would focus on a few of the topics you mentioned and go into them in more detail.

Why is a dac better than a sound card?
This one deserves mention of digital audio as a whole. You need to explain analog vs digital, resolution, sample rate, Nyquist Rate, (and the personal opinions of those who feel MOAR is better! This is an excellent read. Read that paper slowly, and thoroughly. Another good one on jitter Their main page with all articles

There is FAR too much to be covered for someone to really understand why a DAC is better than a soundcard, or why some DACs actually do sound better than others, and why and how some DACs can actually sound just as good as your favorite record. I think if you were to cover a single topic and cover it WELL, you would have a better impact. Be sure to present it in a way that is organized, keeps your audience involved, and makes you believable. You have to sell your idea to your interviewers. You can do this by proving that you are a good "trainer."
post #8 of 10
Quote:
Originally Posted by Greg121986 View Post

There is FAR too much to be covered for someone to really understand why a DAC is better than a soundcard, or why some DACs actually do sound better than others, and why and how some DACs can actually sound just as good as your favorite record. I think if you were to cover a single topic and cover it WELL, you would have a better impact. Be sure to present it in a way that is organized, keeps your audience involved, and makes you believable. You have to sell your idea to your interviewers. You can do this by proving that you are a good "trainer."
I agree with this statement. Pick one of those topics and dive deep, afterall, you're only talking for 10 minutes.
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post #9 of 10
I like the DAC explanation, but in one of those sub topics pick the one there that interests you the most in a go into detail, just don't make it too boring

Even maybe, just maybe, through in some things about wire/interconnect replacement and how it pairs with DACs maybe? Just have fun, if you have fun and enjoy the work your boss will see it and appreciate you even more!
post #10 of 10
Quote:
Originally Posted by un1b4ll View Post
What's the difference between $20 headphones and $200 headphones?
Dramatic sound quality increase.

Quote:
- Fidelity: what is it and why does it matter?
Hi-Fi is more of a marketing term really.

Quote:
- How high fidelity is accomplished, what are the factors?
Well, you have to read dozens of books on acoustics, electrical engineering, sound, etc. to understand how a good piece of audio equipment is made.

Quote:
- What is needed to maximize fidelity with each part of your set up? Eg, source, amplification, drivers, etc.
Depends. Though the most dramatic part are the speakers/headphones themselves.

Quote:
Why is a dac better than a sound card?
DAC = digital-to-analog converter, it's a single component, a small chip. The so-called "external DACs" are external sound cards with a fancy name. Though if we're talking about studio equipment, there are actually dedicated DACs or ADCs (analog-to-digital) that only do this specific task.

Quote:
What is a soundstage?
A fancy term that doesn't have a whole lot of meaning. Most people think it's how "wide" your headphones/speakers sound, but all these esoteric audio terms (soundstage, warmth, clarity, etc.) are highly subjective.

Quote:
Why use vacuum tubes?
So that the audio companies will get more profit, that's the short answer. Tubes are good for guitar amps, not speaker/headphone amps.

Quote:
How to choose the right setup for your tastes?
By using your ears and by looking up and properly judging the equipment's specifications.
Edited by nielsbohr - 7/27/11 at 7:52am
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