| Past Is Prologue | |
| Type: | Studio |
| Artist: | Tycho |
| Cover: | File:Tycho_Past_is_Prologue_Cover.jpg |
| Released: |
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| Genre: | Downtempo |
| Length: | 63:22 |
| Label: | |
| Prev Title: | Sunrise Projector |
| Prev Year: | 2004 |
| Year: | 2006 |
| Next Title: | Dive |
| Next Year: | 2011 |
Past Is Prologue is the debut studio album by the American ambient music project Tycho. It was originally released under the title Sunrise Projector in 2004, before being re-released by Merck Records in 2006 (and 2007 as an EP sampler), and reissued by Ghostly International in 2010. The album title is a reference to a famous line from Shakespeare's The Tempest.