| True Sound of the Underground | |
| Type: | studio |
| Artist: | Sister Sin |
| Cover: | Sister-Sin-True-Sound-Of-The-Underground.jpg |
| Genre: | Heavy metal, hard rock |
| Length: | 39:02 |
| Label: | Victory |
| Prev Title: | Switchblade Serenades |
| Prev Year: | 2008 |
| Next Title: | Now and Forever |
| Next Year: | 2012 |
True Sound of the Underground is the third studio album by Swedish heavy metal band Sister Sin, released through Victory Records on 13 May 2010.[1]