[Mike Rivers]

On Mar 25, 12:32 pm, Mike Rivers (that's me!)
wrote:

When the level is high enough so that
the test will run, the interchannel crosstalk light on the RightMark
level setting screen keeps going on and off.

I should add that in a crosstalk measurement made by recording with a
signal on one channel and a shorting plug in the other channel's input
connector, the crosstalk on playback was rather high, with the
"unrecorded" channel measuring about 45 dB lower than the recorded
channel, at 200 Hz and 10 kHz. Spec is -77 dB or so at 1 kHz. So maybe
this one is broken, but that wouldn't explain the poor frequency
response that RMAA shows.

[Arny Krueger]

"Mike Rivers" wrote in message

On Mar 25, 12:32 pm, Mike Rivers
(that's me!) wrote:

When the level is high enough so that
the test will run, the interchannel crosstalk light on
the RightMark level setting screen keeps going on and
off.

I should add that in a crosstalk measurement made by
recording with a signal on one channel and a shorting
plug in the other channel's input connector, the
crosstalk on playback was rather high, with the
"unrecorded" channel measuring about 45 dB lower than the
recorded channel, at 200 Hz and 10 kHz. Spec is -77 dB or
so at 1 kHz. So maybe this one is broken, but that
wouldn't explain the poor frequency response that RMAA
shows.

Umm, is there a possibility that this laptop only has a mono input? I know
a lot of laptops do.

[Mike Rivers]

On Mar 25, 2:38 pm, "Arny Krueger" wrote:

Umm, is there a possibility that this laptop only has a mono input? I know
a lot of laptops do.

The laptop does indeed have a mono input for its built-in audio
hardware, but that wasn't what tested poorly. It tests pretty good,
actually. The UCA-202 as you know, has stereo in and out and that's
what behaves oddly with RightMark..

[Arny Krueger]

"Mike Rivers" wrote in message

On Mar 25, 2:38 pm, "Arny Krueger"
wrote:

Umm, is there a possibility that this laptop only has a
mono input? I know a lot of laptops do.

The laptop does indeed have a mono input for its built-in
audio hardware, but that wasn't what tested poorly. It
tests pretty good, actually. The UCA-202 as you know, has
stereo in and out and that's what behaves oddly with
RightMark..

How do your results compare with this?

http://www.birotechnology.com/soundc..._line-line.htm

[Mike Rivers]

On Mar 25, 5:19 pm, "Arny Krueger" wrote:

How do your results compare with this?

OK, I'll take that challenge:

http://tinyurl.com/368zqz
http://tinyurl.com/32v5x6

Understand that this is bogus and doesn't represent the actual
performance of the interface. The actual frequency response is within
a couple of tenths of a dB over the range. I measured crosstalk to be
a bit worse than RMMA, and slightly higher THD at selected frequencies
between 100 Hz and 10 kHz. It doesn't even sound half bad when used to
record music (!).

I'm not complaining about the performance of the UCA202, I'm
complaining about how RMMA measures it.

[Arny Krueger]

"Mike Rivers" wrote in message

On Mar 25, 5:19 pm, "Arny Krueger"
wrote:

How do your results compare with this?

OK, I'll take that challenge:

http://tinyurl.com/368zqz
http://tinyurl.com/32v5x6


ouch!

Understand that this is bogus and doesn't represent the
actual performance of the interface.

No doubt, its bogus.

http://www.birotechnology.com/soundc..._line-line.htm

is pretty much the same as what I get.

The actual frequency
response is within a couple of tenths of a dB over the
range.

As the report I'm citing shows.

I measured crosstalk to be a bit worse than RMMA,
and slightly higher THD at selected frequencies between
100 Hz and 10 kHz. It doesn't even sound half bad when
used to record music (!).

There's something very funny going on with that computer.

I'm not complaining about the performance of the UCA202,

The FR of the UCA202 is pretty much beyond reproach with a caveat. If you
test it as an ADC with a wideband source, it has response up to a few KHz
*above* the Nyquist frequency. IOW, its anti-aliasing has been compromised
to obtain in-band smoothness.

I'm complaining about how RMMA measures it.

Agreed.