[Ubuntu] Change desktop launcher icon

How to change desktop launcher icon? It is surprisingly easy, check here.

[Problem solved] Skype microphone and video problem

I tried to use Skype on Ubuntu Lucid Lynx, but microphone and webcam didn't work properly with Skype. I know I need to get some configuration stuff done, so I did a bit of research and found this link that  exactly tackled my issue:

Skype microphone problem

So the idea is that you need to make sure your microphone is working, and most importantly, the one working is used and recognized by Ubuntu. Other than this, you might need to do some configuration to Pulse Audio.

As for video displaying, you need to make sure your webcam is UVC compatible; if that is the case, then your webcam should be good to plug-and-play.

Howto: test your microphone with ALSA on ubuntu

Audio Linux Sound Architecture (ALSA).

To list sound devices:

$ cat /proc/asound/cards


To check which sound devices are recognized by your alsa system is arecord -l:

$ arecord -l


To test microphone we would use arecord on the command line. This small utility will record sound from your default alsa default sound device.

$ arecord -d 10 /tmp/test-mic.wav


This will record 10 seconds. Now it is easy to play your wav file with another simple alsa utility a play:

$ aplay /tmp/test-mic.wav


NOTE:
If you have a more sound devices on your system and you need to use the non default sound card you can specify it to arecord with -D option. For example:

$ arecord hw:1,0 -d 10 /tmp/test-mic.wav


will use second sound card where 1 refers to card and 0 refers to device as returned by arecord -l command. If you want to change your default alsa sound device globally on the system here is a link to unofficial alsa wiki which you might find helpful: http://alsa.opensrc.org/index.php/FAQ026

Howto: using webcams with Linux Ubuntu?

Check out this link. You will need a UVC compatible webcam. This way you can do video call using Skype or Gtalk in Ubuntu!

Must@p Zone

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