Sonos 4 is a complete audio processing and linking (STL) system for radio
broadcasters that runs on a Windows PC.Think of it as turning a PC into an
Orban Optimod with many extra features.
The software has the following major features
- Low latency (delay) mode with ASIO sound cards. Off air
monitoring while speaking is possible.
- Supports multiple instances allowing one computer to run up to 8 processors
simultaneously.
- Supports both Windows native sound interface (Wave) and ASIO interface (when
provided by the sound card manufacturer). Sample rates up to 192kHz and sample
size up to 32 bits supported.
- Four , five , six and nine band processors. The processor settings are fully
adjustable with easy to use saving and loading of format files. Daypart
scheduling is included. All four processors share common parts such as three
stages of parametric equalization, stereo widener, phase rotator, filtering for
FM and AM, switchable pre-emphasis for FM.
The processor architecture is similar in each processor. Single
or three band gated AGC is followed by a gated multiband limiter
optionally preceded by a multiband compressor. Optional single band gated
limiting can be applied before the final clipper. Pre-emphasis for FM is
applied partially before the multiband section and partially after the final
clipper.
- Within each processor is a 'failsafe' function that will switch the audio to
a backup feed should the main feed fail. The backup can be simply the sound
file player playing a repeating playlist.
- A stereo multiplex generator and RDS encoder for FM use. This feature needs a
192kHz sound card with adequate bandwidth to pass the multiplexed signal.
- LAN or Internet linking to a remote computer (STL function). The link can
send feeds to multiple clients. The link is optionally bi-directional. The
encoder uses Ogg/Vorbis achieving an FM like quality at 64kb/s.
- Audio logging function.
