Stereo Tool

Hi Hans,
Please forgive my ignorance(I guess you've been doing that for some time now!), but I need to know what part of the entire processing chain is pre-emphasis applied for FM tansmission. It's known that to circumvent the noise inherent in FM transmission, specially for high frequencies, the pre-emphasis is applied and the FM receiver on the other end attentuates the high frequencies by an equal amount.

So is the sound that's perceived by a receiver after de-emphasis, the same as that perceived by applying de-emphasis in the StereoTool and converting the output to, say an mp3, and listening to it? Reason I ask this is because the reverberation in bass that I have noticed, kinda disappears when pre-emphasis/de-emphasis is disabled. But then how the local FM stations bring out a bass that's solid even after the de-emphasis applied by the receiver?

The sporadic fluctuations in volume level or pumping is something that's not happening to the entire audio content, rather highs only. So not sure if this has something to do with the new filters that detect voice vibrations and apply corresponding attenuation to bass levels.

One last thing, the preset 'Europe/US FM Tansmitter HOT' - is it designed for some specific genre like trance, party, house or for that matter anything which has very fast tempo? On other genres, I get too much pumping(due to aggressive dynamics in pre-limiter). I like the preset for it's soothing effect and listening ease, but thats one glitch which plagues it at the moment when applied on general music content.

Almost none in this 'Mina' track - haven't tested any others yet. Do you?

Excelent this Beta Clarity... )

Hans i have one request, one more slider at Pre-Emphasis, so we can add more than 50. Its great for Europe Radio Stations in case to adjust the highs. From 50 to 70 will be great.

Thanks

Hans i have one request, one more slider at Pre-Emphasis, so we can add more than 50. Its great for Europe Radio Stations in case to adjust the highs. From 50 to 70 will be great.

Hi Chris,

Can you explain what the purpose of this would be? For FM transmitters, you can select 50 or 75 us - and those settings are needed because receivers perform the matching de-emphasis.

For web radio (or anything that's being encoded to lossy formats like MP3), there's a slider to add _A BIT_ of pre-emphasis to protect against clipping when encoding (or decoding). 15-20 usually suffices to get the maximum effect (setting it higher has little benefits).

Instead, setting the pre-emphasis higher hurts the quality of the highs.


So what are you trying to do?