This suggestion of amateur radio services disallowing the transmisson of musical content worldwide is incorrect.
"Music" was specifically removed from the wording of the Australian Radio Communications Act (1984 and amendments) as forbidden transmitted content during the 1990s, to allow it on official ham news broadcasts as a background/bridging device, ditto on the televising of documentary films containing unavoidable musical backing over ATV (including repeaters). The act STILL specifies ENTERTAINMENT as disallowed material, so that exclusive "musical programming" is certainly disallowed, but its usage for brief tests is not against the law here. A ham radio group in Melbourne on 160 metres often tests their AM radio tx on music for limited periods, particularly after midnight local time when few are in the position to need to complain. With suitable receivers and hi-fi audio reproducing equipment, music is an especially critical test for intermodulation and harmonic distortion, and this is often a concern of those whose professional work is in broadcasting or the high quality audio field. I am one of these. There have been virtually no official complaints, people rarely abuse the privilege, and it is not generally done on bands that propagate internationally, out of respect for other jurisdictions. There have been no prosecutions or warnings issued by official Australian (or other) regulatory sources for this content since the local legislative amendments more than 15 years ago. In fact, very few local hams are even aware of these amendments. I would go so far as to say that prohibition too often invites abuse. Australia provides an example of a country where the usage of music has been relaxed on ham radio, with few abuses. After all, we now live in a world where Skype and other types of VOIP Internet comms allow the personal "broadcasting" of music by anyone, anywhere, anytime. To set assiduous bans on music for ham radio, especially in the minds of younger potential amateur operators, is to promote the idea of it as a hobby for draconian old fuddy-duddies. I am just under 60 years of age, and I can see absolutely no justification - copyright or otherwise - for any blanket ban on music tx. Music has always been permitted, on a very limited basis, for testing purposes by New Zealand hams. If necessary, I can quote the necessary paragraphs from their legislation. Hoping that this amends a few incorrect assumptions, Best wishes, Christopher Long VK3AML, Melbourne, Australia. ======================================================================= On 12/06/2012 11:54 PM, Bruce Robertson wrote: > Amateur radio services around the world disallow the transmission of > music. Thus, for these applications Codec2 provides the additional > feature of always demusicifying your audio stream :-) > > 73, Bruce VE9QRP > > On Sun, Jun 3, 2012 at 2:17 AM, Jean-Marc Valin<jmva...@jmvalin.ca> wrote: >> Hi, >> >> As David pointed out, please read my blog post on the quantizer: >> http://jmspeex.livejournal.com/10446.html >> The fact that it combines VQ and prediction means that there is no >> precise "resolution" on the pitch. The pitch error depends not only on >> the frequency, but also on how continuous the original pitch is. >> >> In general, I would say that one shouldn't expect codec2 to sounds >> anything other than atrocious on music. That's just not what vocoders >> are meant to code and it's not worth making voice worse just to make >> music slightly less awful. >> >> Cheers, >> >> Jean-Marc >> >> On 12-06-01 05:49 AM, Rick van Rein wrote: >>> Hello Gullik, >>> >>>> I feel you are into something here. From what I believe, it is not >>>> the absolute pitch though (unless you have absolute hearing ?? ) >>>> but the relation between various frequencies that is percieved >>>> as on key or false. >>> Indeed. Still, there is a need to use absolute frequencies >>> for a codec, so there's nothing wrong with supporting the >>> absolute values by incorporating the 440 Hz and vary around >>> it. >>> >>>> How would this impact the necessary math? Working from sampling, discrete >>>> time, what is the "natural" result in frequency? >>>> >>> David already corrected me that the current Codec2 actually >>> uses a log scale, which is good. I am going to look into it to see >>> if the steps of the scale work, or if mild modifications would >>> make it work better for music, if needed. (And I am checking up >>> on non-Western musical scales.) >>> >>> >>> Cheers, >>> -Rick >>> >>> ------------------------------------------------------------------------------ >>> Live Security Virtual Conference >>> Exclusive live event will cover all the ways today's security and >>> threat landscape has changed and how IT managers can respond. Discussions >>> will include endpoint security, mobile security and the latest in malware >>> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ >>> _______________________________________________ >>> Freetel-codec2 mailing list >>> Freetel-codec2@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >>> >>> >>> >> ------------------------------------------------------------------------------ >> Live Security Virtual Conference >> Exclusive live event will cover all the ways today's security and >> threat landscape has changed and how IT managers can respond. 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