The SADiE PCM-H128 system is a multitrack digital recorder which can benefit from the full range of SADiE editing and processing features which comprise SADiE 6 software. The PCM-H128 can slot seamlessly into a range of traditional analogue or digital studios, with modular I/O available in multiples of 16 channels up to 128 in 128 out. The PCM-H128 comes in two form factors: the 4u MADI version and the 10u "Expander" version. The former provides digital I/O only on MADI interfaces. The latter provides an expansion chassis into which can be plugged a range of cards known as "slithers" providing flexible combinations of analogue and digital I/O options. The Expander section has slots for up to 24 slithers, allowing for configurations that include up to 128 channels of Analogue and digital I/O.