The following FM transmitter specific options are provided: No separate hardware stereo coder or hardware RDS encoder is needed.
Stereo Tool can generate an MPX signal, including stereo and RDS data, which can be sent to the FM transmitter using a good quality soundcard like the Marian Trace Alpha The extremely steep phase linear lowpass filter can be used to cut off frequencies that cannot be broadcast (streaming audio, FM transmitter, AM transmitter). Especially useful for radio stations that want to sound loud. This filter can make sounds up to 12 dB louder, without causing higher amplitude peaks in the signal, with little effect on the sound. The Stereo Tool Final Limiter can transparantly remove short spikes in the signal - so with nearly no effect on the sound. This filter increases the bass level without increasing the maximum amplitude of the bass.
So the mono sound still sounds just as full and powerful as the original stereo sound. It can be configured to not alter the total sound content.Ĭonverts stereo to mono without removing sounds that normally cancel out each other. This filter increases the existing stereo sound, unless it was already very loud, which makes the sound much fuller. For FM transmissions this can reduce multipath distortion. This filter automatically detects and repairs such errors. It can also cause severe artifacts when converting the sound to mono or when playing it on a surround system.
These phasing errors can make listening very unpleasant, and when the phasing error changes over time the sound can seem to "float" around you. Old tape recordings and many cheap CDs often suffer from severe phasing errors.
Phasing error (AZIMUTH) correction filter. Older or bad quality recordings can be made to sound closer to the sound of modern CD's, which generally sounds much better on a wide range of playback equipment. If one song contains a lot of bass, and the next contains a lot of treble, this filter can make them sound equal. 2-9-band multiband compressor / limiter. Different from many traditional processors, the AGC in Stereo Tool is not peak level based but acts on how loud something sounds to human hearing. This AGC keeps all the sounds below a defined level. This is useful when the input signal comes from an FM transmitter, for example when re-broadcasting the sound from an FM station. Especially useful when playing older songs or when a lot of volume compression is used. Stereo Tool contains a powerful hiss reduction filter that has almost no effect on the rest of the sound. Removes constant tones such as a 50/60 Hz hum on the fly. See the Perfect Declipper site for more info. It finds and restores clipping (distortion caused by too loud input levels) which is present in most music from the last two decades. At the maximum quality the processing latency is 93 ms.Ĭurrently, Stereo Tool offers the following sound processing options:Ī unique filter only found in one other processor. The processing latency can be reduced as low as 12 ms, at the cost of reduced fidelity. Special support (not free) is included for radio stations: Much louder output levels, FM pre-emphasis, stereo coding and RDS coding for FM stations, and protection of highs against distortion caused by lossy compression for web radio stations. It can repair 'broken' stereo images which often occur on cassette tapes, vinyl and cheap CD's, which normally causes havoc when playing it on a mono system, headphones or a system which includes a stereo widener. Stereo Tool can make recordings sound equal and consistent in volume and sound color, bring out the details, and increase existing stereo effects. Stereo Tool makes your music sound more consistent, powerful, clear and detailed than ever before - regardless of whether you play it through low end or high end equipment. Stereo Tool Basic Broadcast FM/HD/HD/DAB Audio Processing Software.
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