i have the speak button enabled , my mic is plugged in but still noone can hear me

[MartinRJ Fayray]

Hello Gfoult,

in the menu under Me->Preferences->Sound&Media->Input/Output devices make sure that the correct input device is selected.

[MartinRJ Fayray]

Hello Gfoult,

in the menu under Me->Preferences->Sound&Media->Input/Output devices make sure that the correct input device is selected.

[valerie Inshan]

Make sure "EnableVoiceChat" is set to "true" in the debug settings. You can access these either from the login screen without login in (At the top left > Debug > Show Debug settings), or inworld enabling the Advanced > Develop Menu.

Check in this link if all your voice parameters are correct. Test your own voice to check if you can hear yourself. 

Testing voice

Teleport to Voice Echo Canyon and start talking. Whatever you say there will be repeated back to you so you can test the quality of your voice.

http://community.secondlife.com/t5/English-Knowledge-Base/Using-voice-chat/ta-p/700169

[Codewarrior Congrejo]

In addition to the other good answers:

if you have skype - and none of the former solutions helped: go into your Skype Menu : Tools - Options - Audio settings - and see if the microphone Balance is down on zero.

If so: pull it up to a good value, save & exit  again.

Skype has that very poor behaviour to continously drill the mic volume down - known issue on W7. (even with volume automatic adjustment being not active) and unfortunately sets it across your system settings for the microphone.

Very bothersome for a lot of the skype users.

(http://superuser.com/questions/450055/volume-randomly-turning-itself-down-on-windows-7-64-bit, and here another fix: http://www.bartbusschots.ie/blog/?p=609 )