Support and General Use > Recording
inverted phases on iaudio x5
soap:
Wouldn't creating a DC offset sine wave for this test be easy enough?
saratoga:
Assuming it records the DC level that would work. It might filter out the DC via coupling capacitor or similar though.
z-man:
--- Quote from: saratoga on July 20, 2008, 07:58:21 PM ---
And you're certain they're not both non-inverted? I guess you checked a less symmetric signal then a sin wave.
--- End quote ---
Yes, I'm sure. And please: Normally, I would be able to identify my wife not just because she has something that I don't have. Thus, looking at the signal with audacity and enough spreading enabled doesn't need a sin wave to tell whether it is inverted or not. But you're right, keeping things simple can't be a bad idea, and so I recorded an almost sin like wave from a keyboard onto my reel to reel tape. Next, I connected the analog output of the tape to the analog inputs of
- the Cowon X5
- a Sony Hi-Md walkman
- a Soundblaster Live soundcard
- a Steinberg Mi4 audio interface
Result: Compared to the other 3 devices the X5 signal is inverted.
Chronon:
Does the X5 use inverting op-amps in the amplification stage? It seems that there are no real-world situations where this will be audible anyway, so I'm somewhat missing the point here.
saratoga:
--- Quote from: z-man on July 21, 2008, 08:44:28 AM ---And please: Normally, I would be able to identify my wife not just because she has something that I don't have. Thus, looking at the signal with audacity and enough spreading enabled doesn't need a sin wave to tell whether it is inverted or not.
--- End quote ---
Well yes, thats the point, you can't tell if the signal is inverted with just a sin wave, hence the need to test something else.
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