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| Portable Source Gear Discussion of portable audio source gear, like iPods, other digital audio players (DAPs), MD players, portable CD players. |
07-19-2001, 12:53 AM
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Member: Internetus Quickus
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Join Date: Jun 2001
Location: Wichita,KS
Posts: 249
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Demonstration of anti-skip quality
1-22050 Hz frequency sweep on Pansonic SL-SW860 into SBLive! at 48 kHz...
Without anti-shock on:
And with:
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07-19-2001, 12:58 AM
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Headphoneus Supremus:
Moderator:
Keeper of the 'Phones
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Join Date: Jun 2001
Location: Wading River, Long Island
Posts: 4,550
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Thanks, Roterang. But could you explain what the heck I'm looking at? 
__________________
SEARCH and ye shall find!
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07-19-2001, 01:09 AM
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Headphoneus Supremus:
Moderator:
Manufacturer: JMT Audio:
PPA/META42 Amp Factory
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Join Date: Jun 2001
Location: The capital of California
Posts: 6,322
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I don't know what I'm looking at either, but I sure do like the colors. 
__________________
If it sounds good, it is good....
- Duke Ellington
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07-19-2001, 01:16 AM
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Headphoneus Supremus:
Moderator:
Keeper of the 'Phones
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Join Date: Jun 2001
Location: Wading River, Long Island
Posts: 4,550
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I think I got it! (maybe)
The yellow bar at the top represents deviations from the sweep generator....the less spikes the better? The line with the anti-skip on has more spikes......that's bad. OK, anybody......
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SEARCH and ye shall find!
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07-19-2001, 01:37 AM
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Headphoneus Supremus:
Banned Moderator
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Join Date: Jun 2001
Location: Seattle, WA
Posts: 3,206
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hey, shouldn't this be in portable Audio?
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07-19-2001, 02:18 AM
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Member: Internetus Quickus
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Join Date: Jun 2001
Location: Wichita,KS
Posts: 249
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Heh, sorry Neruda.  The top bar doesn't mean much, it's the waveform of the signal, but is packed so tightly you can't see anything useful. The bottom part is a spectograph. Bottom represents DC, top 24000 Hz. Left is the start of the recording, right is the end. It's basicly just a graphical representation of the frequency and loudness of a signal over time.
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07-19-2001, 02:25 AM
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Headphoneus Supremus:
Banned Moderator
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Join Date: Jun 2001
Location: Seattle, WA
Posts: 3,206
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hey, no problem
so, what should we be getting out of these graphs? why is there that blue background on one and not on the other? What does that mean?
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07-19-2001, 02:30 AM
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Member: Internetus Quickus
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Join Date: Jun 2001
Location: Wichita,KS
Posts: 249
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Here's a more conventional display that is more recognizable:
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07-19-2001, 02:33 AM
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Member: Internetus Quickus
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Join Date: Jun 2001
Location: Wichita,KS
Posts: 249
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The blue noise in the background in the second one is the noise being caused by the anti-skip on the CDP. It's basicly white noise and not very loud, so it looks like a blue tint without any definate bands of color or detail. The changes in intensity as the main signal goes up must be a side effect of the compression the player uses.
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07-19-2001, 03:49 AM
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100+ Head-Fi'er
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Join Date: Jun 2001
Location: Ontario Canada
Posts: 221
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Wow that looks cool
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07-19-2001, 12:39 PM
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Headphoneus Supremus:
Will upgrade headphones
when there's a MX600.
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Join Date: Jun 2001
Location: The Netherlands
Posts: 2,370
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woah, colors!
that spike at 10k looks like it hurts! is it caused by the antiskip? 60dB  ?
and if left is start and right is end, how do you explain the "laserbeam" bouncing off the right side on the first and second pic? Those double blue lines seem curios too.
__________________
has in fact upgraded headphones, after waiting for an mx600 for 6 years ;)
NAD C525 > Arietta > HD580
Ipod Classic 120GB > MX400
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07-19-2001, 01:35 PM
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Headphoneus Supremus:
The butter knife's second victim.
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Join Date: Jun 2001
Location: Pittsburgh
Posts: 1,972
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I think the 10khz spike means that he was playing a 10khz test tone while executing that test, Braver...
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-> Head-fi member #10.
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07-19-2001, 02:08 PM
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Headphoneus Supremus:
Will upgrade headphones
when there's a MX600.
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Join Date: Jun 2001
Location: The Netherlands
Posts: 2,370
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ah...well just shoot me then :/
__________________
has in fact upgraded headphones, after waiting for an mx600 for 6 years ;)
NAD C525 > Arietta > HD580
Ipod Classic 120GB > MX400
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07-19-2001, 09:58 PM
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Contributor  Headphoneus Supremus Thought the last line in Citizen Kane was "nosebud."
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Join Date: Jun 2001
Location: Back to Munich - bye Hannover!
Posts: 5,943
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Would you mind posting another monoburst-graph in a lower frequency (~1 kHz, maybe?)? The weak blue lines in the first graph look like aliasing components - I'd like to have a closer look at these...
Gretings from Munich!
Manfred / lini
__________________
No p/hun intended! :D
Bavarian headphone barbarian and professional computer journalist, suffering from bad consumer electronics collectitis. ;)
Favs: AKG K240S - "The new Groovalizer" as well as Beyerdynamic DT531 & DT440 - "The old Groovalizer" & "The Funkalizer"
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07-19-2001, 10:16 PM
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500+ Member:
Making Grados better through surgery.
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Join Date: Jun 2001
Location: large apple
Posts: 999
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did you use the headphone out or the line out? the blue lines might be distortion from the amp.
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the world is my lollipop!
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