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2007-11-30
, 14:28
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Posts: 19 |
Thanked: 1 time |
Joined on Nov 2007
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#2
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2007-11-30
, 17:41
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Posts: 3,524 |
Thanked: 2,958 times |
Joined on Oct 2007
@ Delta Quadrant
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#3
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2007-12-01
, 02:23
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Posts: 139 |
Thanked: 73 times |
Joined on Oct 2007
@ Winnipeg, Canada
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#4
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2007-12-01
, 04:17
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Posts: 3,524 |
Thanked: 2,958 times |
Joined on Oct 2007
@ Delta Quadrant
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#5
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Well, if nobody else is going to chime in, I will. I don't have an IT at the moment (waiting for the 810 developer device moment), but I believe the tablets can play 44.1/48k files just fine (I'd be HUGELY surprised if they can't).
Stereo Audio Codec
* 20-Bit Delta-Sigma ADC/DAC
* Dynamic Range: 98 dB
* Sampling Rate Up to 48 kHz
* I2S Serial Interface
* Stereo 16(Omega -- Ohms) Headphone Driver
...
The TSC2301 features a high-performance 20-bit, 48-ksps stereo audio codec with highly integrated analog functionality. The audio portion of the TSC2301 contains microphone input with built-in pre-amp and microphone bias circuit, an auxiliary stereo analog input, a stereo line-level output, a differential mono line-level output, and a stereo headphone amplifier output. The digital audio data is transferred through a standard I2S interface. A fully programmable PLL for generating audio clocks from a wide variety of system clocks is also included.
The challenge will be to achieve "crystal quality, low distortion sound" through the headphone jack, as almost all such devices have significant hiss at the headphone jack. It's not usually a problem when listening through crappy headphones while riding the bus, but audiophile territory, it's not (YES iPOD, I'M LOOKING AT YOU!!!). And depending on the volume you'll need to adequately drive your preamp, the distortion might also be a big issue. So even assuming the N810 can play those files, they'll probably sound lousy if connected through the audio out. So...
I've been looking at various UPnP devices today, thinking about streaming the music to my audio equipment. Assuming the media bridge/player is of decent quality, it should sound good. Perhaps you could even find one with digital outputs for your audio equipment (assuming you have digital inputs available). Maybe this would work in your (as yet unannounced) situation?
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2007-12-01
, 04:30
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Posts: 160 |
Thanked: 7 times |
Joined on Nov 2007
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#6
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I'm not sure how to test the fidelity cheaply. Perhaps generate a WAV file of various sound frequencies, use a male-male jack to output it directly into a PC mic (or line in) jack, record the resultant sound to a WAV, and analyze the range of the newly saved WAV file. Not perfect, as you'd lose quality over the connection, but at least it would provide some insight.
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2007-12-01
, 04:44
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Posts: 160 |
Thanked: 7 times |
Joined on Nov 2007
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#7
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2007-12-01
, 05:14
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Posts: 3,524 |
Thanked: 2,958 times |
Joined on Oct 2007
@ Delta Quadrant
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#8
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This would provide no insight.
What I think you're saying is that you want to measure frequency response, which is a question that's just off the mark in many ways. First of all, frequency response is a product of everything in the chain, definately not just the source. Besides, plugging a source directly into a recording device is nonsensical; think about it: it's the equivalent of trying to judge a camera's colour reproduction while looking through a filter of random colours. Measuring frequency response is not something you can really do well at home, even with high-end recording equipment. But all that is moot, since no piece of consumer technology aims to give flat/balanced frequency response (that is, not boosting some frequencies over others). This is the chief concern for audio recording and mastering, for which unembellished reproduction is needed, but it absolutely is not for consumer products--even the very high end.
Lastly, you shouldn't be worried about the sound quality if what you're doing is plugging a portable device into a stereo via 1/8" for two reasons. First, this is the worst way to transmit an audio signal, but it's all relative so if you consider sound you've heard over 1/8" to be "crystal clear" then we've just got different standards. Second, almost every MP3 player or PDA out there has very similar specs for their amps, which are by no means sophisticated or great. Maybe a few devices have noticeably better quality and a few noticeably worse, but this is again completely subjective since it's not the aim of consumer audio to give balanced frequency response. Play around with your EQ on any device, and you'll probably find something that sounds "better," but it's certainly not more accurate.
I wouldn't count on the N810 for that. I wouldn't count on whatever headphones you pick up that claim to go down to 6Hz either though. I can't help but think that, if something like this can be effective, it would need to be done through speakers since the inaudible frequencies can only affect you through your bones (up to half of your hearing is from reverberations through your bones).
Or are headphones supposed to be fine for this stuff?
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2007-12-01
, 05:28
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Posts: 231 |
Thanked: 21 times |
Joined on May 2007
@ Singapore
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#9
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2007-12-01
, 06:14
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Posts: 160 |
Thanked: 7 times |
Joined on Nov 2007
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#10
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Any insight would be swimming.
}:^)~
YARR!
Capt'n Corrupt