Behringer UCA 202
Manufacturers Specification:
2 channel (stereo in/out)
Line level in/out
16 bit 44.1/48kHz
LINE IN
Connectors RCA, unbalanced
Input impedance approx. 27 kW
Max. input level 2 dBV
LINE OUT
Connectors RCA, unbalanced
Output impedance approx. 400 W
Max. output level 2 dBV
DIGITAL OUTPUT
Socket Toslink, optical cable
Output format S/PDIF
PHONES OUT
Socket 1/8" TRS stereo jack
Output impedance approx. 50 W
Max. output level -2 dBu, 2 x 3,7 mW @ 100 W
USB 1.1 type A
Frequency response:
10 Hz to 20 kHz, ± 1 dB @ 44.1 kHz sample rate
10 Hz to 22 kHz, ± 1 dB @ 48.0 kHz sample rate
THD
0.05 % typ. @ -10 dBV, 1kHz
Crosstalk
-77 dB @ 0 dBV, 1 kHz
A/D 89 dB typ. @ 1 kHz, A-weighted
Signal-to-noise ratio
D/A 96 dB typ. @ 1 kHz, A-weighted
POWER SUPPLY
USB connection 5V 100 mA max
I have a very old version of this device - the label has fallen off and there is no headphone or S/PDIF socket.
Performance testing using:
Acer 5735 laptop
Using USB 2.0 port
Linux Ubuntu 9.04 operating system
(Results identical whether running from mains power or batteries.)
Audacity 1.3.13 alpha
Noise level is -78.3 dB with the input level set at 100%
This gives a 0.4 dB drop if I link the output directly into the input.
Testing the frequency response - flat (within 0.1 dBfs) from 20Hz to 19kHz (-2.5 dB at 20kHz)
Latency correction:
Pulse Audio/ALSA
Recording quality 44100kHz 32 bit stereo
234 milliseconds
Jack Audio (rt = off)
(safe settings)
Recording quality 44100kHz 32 bit stereo
49 milliseconds
(fastest settings)
Recording quality 48000kHz 32 bit stereo
36.7 milliseconds
Additional information for installing and running Audacity Daily build on Ubuntu 9.04:
This is the set-up that I use, - hopefully it will work for others:
If not already installed, install PulseAudio device chooser, and PulseAudio Volume Control.
PulseAudio Device chooser will load into the panel and allow quick convenient access to PulseAudio Volume control.
Set Audacity to use Host=ALSA and Playback/recording devices to “default”.
This should configure Audacity correctly to use your default sound system settings.
The input/output (recording/playback) devices can then be set using PulseAudio Volume Control.
The latest Audacity 1.3.12 is available from here: https://launchpad.net/~audacity-team/+archive/daily
To use Audacity with Jack - ensure that you have a working/stable Jack system running before opening Audacity.
Open Audacity and set the Host preference to Jack (Edit > Preferences > Devices)
Set the recording sample rate the same as Jack is using. (Edit > Preferences > Quality)
Exit preferences. Everything should be ready to go.
Audacity will use the Jack system inputs and outputs by default.
[Update] I tried connecting the output of a hi-fi CD player directly to the line input of the UCA-202. No matter what settings I used on the computer the signal was always clipped (distorted) a bit during loud music. I would not recommend using the UCA-202 in this way. Provided that the device that is connected to the UCA-202 has an output level control there is no problem.