Making authentic audio files

[esllou]

I am trying to make some audio files for my site and wanted to know if anyone knows of an application, preferably free, that allows me to combine two sound files...the main spoken one plus a background "effect" such as traffic noise, etc.

sorry if this isn't the best forum for this question.

[flyingpylon]

I use Audacity. It's free.

[tbear]

It's also very good :)

[esllou]

thanks for that, it looks perfect

:-)