pulse8 wrote:the following is a quote from an Irish radio message board under a thread relating to sound solution
This is not aimed at you or anyone - personally - I thought I\'d respond...
The trouble with any of these type of software processors is that they don\'t actually peak limit the signal sufficiently well (thats the tricky bit - hard limiting without loads of distortion), and also don\'t usually take account of the 50 us pre-emphasis
One of the benefits straight away is that SS not only knows about 50uS Pre-Emp, it also knows/handles 75uS Pre-Emp. Sure, they are correct in the fact that HFreq can result in over-deviation and unwanted sideband \"artifacts\" in the sound - but in the case of software based Processors other factors also come into play - CPU, WDM drivers (if used), quality of the module.
I\'ve been extremely fortunate to play with SS in a test environment, have picked up a couple of issues (both programming and in the processing side) that the author of this module - Alessandro - has found, fixed and released an update in days.
v1.3.1b is brilliant - I\'m impressed with it, and would love to see it in a standalone \"appliance\".
the result is stations which \"sound\" similar loudness to the legals (running Optimod , Omnia etc) are actually vastly over deviating, thus risking splatter to other band users.
...or even band users away from the FM band. Totally unpredictable, based on antenna gain/design/loss, TX quality and how bad the deviation is. Have heard stories of FM stations \"bleeding\" into the 120-140Mhz band (used in Australia for Air Traffic controll, etc!!).
Bob Orban, Frank Foti and co really DO know what they are doing!
No arguments there. They have experience of knowing how far they can push audio processing. My opinion is that you treat processing with the respect it deserves, it will behaves in both a Hardware and Software environment regardless...
Best regards,
Rossco
