Cascading multiple units

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Multiple Orpheus units can be used on the same PC or Mac by simply 'daisy-chaining' their FireWire cables, i.e. connecting the second unit to the spare FireWire connector on the unit already connected to the host.


The number of units which can be used successfully depends on the bandwidth of the FireWire bus, and also on the processing power of the host computer and its audio software.  The latter depends mostly on the host's CPU and RAM fitment; for more information see the Stability and latency section.


Bus-bandwidth limitations are absolute, and apply no matter how powerful the computer is.  They depend on the sample rate:


Sample rate

Maximum number of units

44.1kHz, 48kHz


88.2kHz, 96kHz


176.4kHz, 192kHz



It is not recommended to mix Orpheus and other FireWire devices on the same FireWire interface.  This can lead to loss of audio channel capacity, or even loss of audio.