M Audio Processor is a professional audio device for FM radio stations. Its main function is to optimize and control audio signals so that they have better sound quality, consistency and legal modulation range in FM transmission.
Main functions include:
1. Dynamic Range Compression
Reduce volume differences, make quiet sounds louder, loud sounds smoother, and improve overall listening experience.
2. Limiter and Clipping
Prevent audio signals from exceeding the FM modulation range, avoid overmodulation, and ensure compliance with broadcast specifications.
3. Pre-emphasis and De-emphasis Control
Adjust the high-frequency sound range to adapt to FM modulation characteristics and reduce noise interference.
4. Stereo Encoder
Encode the left and right channels into the composite signal format required for FM broadcasting.
5. RDS/RBDS encoding support (optional)
Supports embedded metadata such as radio station name, track information, time, etc.
Application scenarios:
- FM broadcast transmission front-end equipment (before the transmitter)
- Radio studio and after the mixing console
- Occasions requiring high-quality audio processing (such as music broadcasts, news broadcasts, etc.)
Common interfaces:
- Input: balanced analog audio (XLR), AES/EBU digital audio, network audio (such as AES67)
- Output: stereo composite signal, pre-emphasized audio signal, RDS output
- Control: Ethernet interface for remote management, USB for settings or firmware upgrades
Common brand and model examples:
- Orban Optimod-FM series
- Wheatstone Audioarts AirAura
- StereoTool (software processor)
- Inovonics FM Audio Processor
- Omnia (Telos Alliance)
