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Re: Audiobytes are here (litterally!)
Mojo #188452 12/16/07 12:10 PM
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 Originally Posted By: Mojo
After 17 years with GE, I am ecstatic to have the opportunity to **CENSORED** my technical and management skills for smaller companies that are experiencing growth challenges.


Wait a minute... I just rememebered your... slightly... "off topic" thread about implementing methods to increase maintenance cost predictions or something like that. Part of your old life or new life?

PS: And please stop using words like "**CENSORED**" on a friendly forum!

Last edited by EFalardeau; 12/16/07 12:11 PM. Reason: Because of **CENSORED**

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Re: Audiobytes are here (litterally!)
EFalardeau #188457 12/16/07 02:54 PM
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LOL. That's part of my new life. I've always been interested in reliability assessments and particularly, their application to management planning. I've done a lot of that on the hardware side but only dabbled in firmware/software reliability. Since I posted that, I've done considerable research and created a model that is now being **censored** by one of my clients.


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Re: Audiobytes are here (litterally!)
Mojo #188458 12/16/07 03:13 PM
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That's a great point on the EP0. If you want portability, that's the way to go. I can't be lugging my 30 pound powered sub with me.

Regarding the SPL levels, it's really difficult to judge performance with recorded music because you don't know what reference level it was recorded at. Peak levels for example may be recorded 10dB down from 0 reference (or maybe 20dB down judging from your readings). I would think the best way to judge would be to use a test CD that is known to be recorded at 0dB in a room that is much larger than the speakers themselves. And the speakers would have to be placed well away from room boundaries. I've been using the Realtraps test tones off of their website for these kinds of purposes.


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Dedicated mid-woofers are over-rated
Re: Audiobytes are here (litterally!)
Mojo #188460 12/16/07 03:34 PM
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 Originally Posted By: Mojo
[...] a room that is much larger than the speakers themselves.

I sure hope so! \:\)

That being said, if you were talking about the Virtual MR1, I just tried at 1Khz, 0db: (note: they knob has not markings, so the position is not entirely accurate)

09:00 = 71.3
10:00 = 81.3
11:00 = 86.7
12:00 = 90.0
13:00 = 95.5

Does that give you a better idea? For music, 11:00 is alright, 12:00 is good and 13:00 is excellent in terms of clarity and presence. I did not try it at 14:00 and more for the test signals as the neighboors might still be sleeping.


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Re: Audiobytes are here (litterally!)
EFalardeau #188461 12/16/07 04:33 PM
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Yes, thanks, that makes a lot more sense. What's Virtual MR1?


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Dedicated mid-woofers are over-rated
Re: Audiobytes are here (litterally!)
Mojo #188462 12/16/07 04:36 PM
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It is a software that I downloaded from the site you mentionned that simulates a phyical device to inject test signals into the soundcard (or soundsystem in the case of the real device). I tought that's what to which you were refering.


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Re: Audiobytes are here (litterally!)
EFalardeau #188463 12/16/07 04:41 PM
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I was referring to this one.

What's the link to the one you downloaded?


House of the Rising Sone
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Dedicated mid-woofers are over-rated
Re: Audiobytes are here (litterally!)
Mojo #188465 12/16/07 04:49 PM
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Re: Audiobytes are here (litterally!)
EFalardeau #188466 12/16/07 04:49 PM
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Those are useful stats Eric. The spec say these speakers have a sensitivity of 87db at 1 metre which is my listening distance. With that robust amp we will cleanly hear instantaneous 104db peaks without clipping. That amp was likely the largest cost component and what really sold me on placing an order.

One beef I've always had with ordinary computer speakers was how easily their puny power supplies clipped transients. Those artifacts just aren't happening with the Audiobytes. If we keep the dial so we get 87db at 1m (90db at .5m) we have another 17db of headroom before clipping which should be enough to cleanly reproduce the peaks on most recordings.

On this issue of dynamic reproduction, a friend of mine reminded me that one of my favourite acoustic blues recordings "The Folk Singer" done in 1963 by Muddy Waters sounds so good because its range is in the 20db zone. The recording has several quiet passages where Muddy Waters voice goes from a soft whisper to a loud wail. When I hear these tunes on most receivers I turn the volume down. Not so with the Audiobytes.

If you enjoy this genre then this recording is a must. The really neat thing is that you can usually find it for $8 at Best Buy or Future Shop.:).


John
Re: Audiobytes are here (litterally!)
EFalardeau #188467 12/16/07 05:04 PM
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Eric, thanks for that link. That's a really cool program. My laptop "works" from about 200Hz to 16KHz (using the sweep). It'll be interesting to see if this is a limitation of the sound card or the speakers.

BTW, the link I sent you is probably best for your main system.


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