On Tue, 2009-04-28 at 00:16 -0700, pd0psb wrote: > > I aware though that dynamics processing in audio is an artform as such. > Frequency-dependent (or "multiband") dynamics processing multiplies all > variables so is an even higher art :-) > > But it is capable of very well controlled results with a minimum of > artifacts!
In the pro Audio world compression is a different game to the AGC in a receiver. In music we are controlling dynamic range over a few dB only, even over this limited range it's arguable that this results in 'minimum artefacts' but then most of my work in pro audio was spent working with Acoustic Music with an inherent large dynamic range, even small ( a few dB on transients etc) can alter the overall colour of a recording in unacceptable ways, This is one of the reasons that I used to go to a very good mastering engineer in a separate mastering studio when we needed to muck about with the overall Dynamic range of a good acoustic recording . In Rock/pop and in broadcast radio the effects of multi-band compression are easy to hear and often not very pleasant at all to listen to although they have long been part of the overall 'sound' The K3 has an excellent AGC, if you wish to weight it towards the lower (af) frequency then try AGC SFT (Soft) in the new firmware and set some slope. AGH HLD is also a great feature, RACAL used an AGC system like this on the RA-3720 and it's wonderful to see the same AGC feature in the K3. Experiment with the release speed and threshold too. transient reject is already in there and has been for a long time (AGC PLS = NOR) the K3 ran rings around my Icom 7800 in this regard, the only thing I miss about the 7800 is all the money I lost in deprecation whilst I owned it. Multi (audio) band AGC belongs in outboard gear if this is something you really feel will add to your enjoyment of the radio Multi-band compression (IF DONE RIGHT..) may further improve the average power in SSB whilst maintaining intelligibility, However most of the Multiband processed audio I hear on the HF bands is too wide (lots of LF energy complete with the in-band IMD it can cause) or over-done, enough fidelity is lost that it actually degrades the ability to copy the station on a noisy band. 73 Brendan EI6IZ -- Don‘t complain. Nobody will understand. Or care. And certainly don‘t try to fix the situation yourself. It‘s dangerous. Leave it to a highly untrained, unqualified, expendable professional. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
