Wednesday 25 March 2020

He Loved Him Madly

The Miles Davis septet in 1971 - note Miles on the wah wah pedal

Here in the lounge lately I have been digging an artist who I have dipped into from time to time over the years, but never in a serious way: Miles Davis. 

Among certain people I expect Miles Davis, or Miles as most people seem to refer to him as, is revered like Bob Dylan as being almost saint-like.  I've never been much for the cult of personality thing around certain artists, but there are some who stand out as true geniuses.  For me Bob Dylan is one and I think also Miles Davis, although I am much more familiar with Dylan's music. 

I would also count Alice Coltrane in this group, even though she, because she was a woman I expect, did not receive the recognition of her husband John Coltrane.  I think I will write about Alice Coltrane at another time as I consider her music to be truly transcendental.

So what of Miles?  Well he had his periods ranging from the be-bop era to cool, orchestral jazz and his later electronic stuff from the late 60's to the mid 70's.  I've got albums from the 50's and sixties which cover some of the early periods and I've owned the seminal fusion album Bitches Brew for many years.  Yet, other than the latter album, I've never really explored his electronic period in any great deal.  Some years ago I picked up a copy of Bill Laswell's album Panthalassa which is a remix of tracks from this period and I always enjoyed it.


So I had started, for no particular reason, to stream the 1969 album In a Silent Way a few months ago.  Oh, this album is truly a work of beauty.  It is Miles' first foray into electronic music, touching on funk, rock and ambient (not yet invented of course).  Just two tracks each of 20 minutes or so long, it is music in which to lose yourself.

When in Melbourne recently I visited one of my favourite record shops and they had just landed a shipment of Miles lp's and I went straight to the rack and grabbed a copy of Silent Way and Down on the Corner, which help create the template for drum and bass which emerged later in the 90's (although there's a lot more to that story). 

While riffing with the bloke in the shop he was very excited I was purchasing two Miles records and he said to me that his favourite Miles lp was Get Up With It from 1974.  He explained that his all time favourite track by any artist was off this album and that my life was incomplete if I did not own a copy.  The song he loves by the way is Rated X.

Now I can see a sales pitch, but he had me intrigued.  Yet I resisted buying the record for a full 10 minutes before I finally gave in.  I'm glad I surrendered.  It is a master work.  It's not for the faint of heart though.  This is no cool jazzy tunes, but rather it is an at times difficult and challenging work which demands a lot of the listener.  I like that in music.  I don't mind a saccharine pop tune, but the records that stick with me are the ones which are hard to crack.

The opening track is called He Loved Him Madly.  Over 30 minutes of ambient jazz, we don't hear Miles on the trumpet until about the 16 minute mark.  Miles was digging playing the organ at this time.

The title of the track is taken from something Duke Ellington said when he closed his concerts "I love you all madly!".  Duke had died a few months before this album was released and Miles was deeply affected by his death, dedicating the album to the Duke's memory.

So I give you the opening track to Get Up With It: He Loved Him Madly.  Until next time - peace and love.



Tuesday 24 March 2020

Tech Alert! NAVTEX signals

A NAVTEX signal received from Singapore


Well it's been quite a while since the Lounge has been in action.  There are a few reasons for that which include a trip to Melbourne for work in February (before the entire world went into melt-down), some serious downtime for a personal improvement project, of which I will write about soon, and a lack of motivation.

Anyway, enough of excuses.  Despite my overall laziness, one thing I manage to maintain as part of my daily routine is to set up a radio receiver and run some software in order to decode NAVTEX signals. NAVTEX are Navigational Telex messages transmitted to ships at sea to warn them of various maritime conditions.  Messages might include warnings of typhoons, persons overboard, navy exercises and most recently COVID-19 related messages.

NAVTEX messages are transmitted on MF (medium frequencies) which are just below your AM radio dial, on both 518 kHz and 490 kHz as well as on high frequency on 4209.5 MHz.  The signal to the human ear is unintelligible and sounds like a stream of data noises.  There's a technical explanation for the transmission mode which I won't bore you with here.  Look it up on the web if you're interested.  I run a piece of free software called YaND (Yet another NAVTEX Decoder) which decodes the transmissions and allows the user to log the stations received.

NAVTEX stations are run by governments around the world, but not Australia curiously enough, and are generally situated in a strategic coastal area.  Stations are divided into a dozen or so zones around the world and each station in each zone transmits for 10 minutes every four hours.  Everything is scheduled (at least in theory) so stations do not transmit over the top of one another.

518kHz is the most regular frequency for me here in Australia and all transmissions on this frequency are in English regardless of the country of origin.  490 kHz is reserved for transmissions in the language of origin.  There are fewer of these stations in my part of the Southern Hemisphere.

The photo above shows signal received from Singapore.  On the screen in the background are the signal and its trace in the waterfall on my software defined receiver.  The YaND software decoding the message sits in the foreground.

The fun starts when radio propagation varies and signals from distant zones are received.  This is what us radio lovers call DX (distance).  The great thing about it is that it is very hard to predict what might happen so all sorts of surprises await the listener.  One advantage with NAVTEX is that I can set the radio to run overnight and I can check the signal received the next day at my leisure.  No staying up until 3am to hear that rare station.

Where I am in Australia is well situated to receive signals from across Asia and sometimes beyond.  When conditions are favourable I have received signals from far away as India, Honolulu, Bahrein and Vladivostock.  My best effort is San Francisco at some 12,200 plus kilometres.  NAVTEX stations are generally low power and aiming to only reach nearby ships so receiving DX stations is a treat.

Each day I upload my logs on to a friendly iogroup based in Europe which has about 30 or so regular contributors and these are then uploaded to  a worldwide database by an editor based in the Netherlands.  I have made some nice friendships through the small NAVTEX DX community and everyone is very supportive of one another.  Here's a sample of a recent log for you.

Peppermint Lounger
Receiver: Afedri SDR rev.6, SDR Console v.3.17
Antenna: PA0RDT Mini-Whip (6m)
Software: YaND v.7.0
 
YYYYMMDD HHMM KHz ID  CALL STATION,COUNTRY             DIST (Km)
----------------------------------------------------------------
20200323 1231 518 $11C 9VG Singapore ,SNG                                     3368
20200323 1237 518 $11E PKX Jakarta ,INS                                           2726
20200323 1251 518 $11F HAS Bangkok  (Nonthaburi),THA                  4426
20200323 1300 518 $11G JNB Naha ,JPN                                              4300
20200323 1311 518 $11H JNR Moji,JPN                                                5146
20200323 1327 518 $11I JGC Yokohama ,JPN                                       5400
20200323 1343 518 $11K JNX Kushiro ,JPN                                         6313
20200323 1348 518 $11M XSI Sanya,CHN                                           4136
20200323 1445 518 $11Q XSG Shanghai ,CHN                                    4941
20200323 1500 518 $11S 9WH21 Sandakan,MLA                                2483
20200323 1510 518 $11T 9WW21 Miri R, Sarawak, MLA                     2637
20200323 1814 518 $11N XSQ Guangzhou,CHN                                  4384
20200323 1851 518 $11R XSZ Dalian ,CHN                                          5785
20200323 1925 518 $11U 9MG Penang ,MLA                                       3910

It seems all of us will be spending a lot more time at home in the coming months so we will need something to keep us occupied.  Exploring the hidden world of signals in the radio spectrum may just be a good way to remain sane.

Until next time - peace and love.