News items for tag podcasting - Koos van den Hout

2017-04-29 Going full duplex with amateur satellites, part 8 : No real contact yet 4 months ago
This evening had a Fox-1A (AO-85) pass at a reasonable time so I decided to drag the entire setup outside and try my luck at a qso. Reception of Fox-1A was bad (maybe I'm somewhat off-frequency) and the major dissapointment was that the receiving side on 2 meter via sdr got deaf when I was transmitting on 70 centimeter. That's not supposed to happen, the whole reason for the full-duplex setup was to be able to hear myself on the downlink.

Anyway, the recording of downlink audio went fine this time so there is a full recording of what I heard. It was a Northwest-Southeast pass which means it took a while before I heard anything because northwest is over the houses. Callsigns heard in this pass: DO3EXE, IZ5ILX, 9A2EY, IZ3KLF, Something with F2D I completely can't decode and "Mr Olla".

My best guess would be a retry on SO-50, FO-29 or AO-73.
Listen to audio attachment:
MP3 media: 20170429 1858Z FOX-1a pass recorded by PE4KH in JO22NC (rightclick, select save-as to download)

Tags: , , ,
2017-04-10 Amateur radio callsign lookup on Android without needing Internet access 5 months ago
Earlier I had the Android application Ham Radio Prefixes - Android Apps on Google Play installed, but it needs some server on the Internet to look up callsigns and determine the country it is assigned to. Sometimes I need to do a lookup off-line, and I noticed fldigi and CQRLOG do that fine when the country data file is installed. So it can be done, I just have to find software that does this right.

On ICQ Podcast Episode 234 - Portable Power Distribution and I heard mention of Pocket Prefix for Android which can be found at Pocket Prefix - Android Apps on Google Play and which works off-line. This was even mentioned on the podcast as one of the advantages. It even gives extra information when available, the given example is that prefix SV is for Greece but SV9 is specific to Crete. Or EA9 is specific to the Spanish enclaves Ceuta and Melilla which are located in Morroco (and therefore count as a contact with the African continent).

It's a nice application, thanks to Derek Turner G4SWY!

Tags: , , ,
2017-03-27 Upgrading WSJT-X after hearing two words 5 months ago
Recently it seems radio noise levels on the HF bands have gone up again so I spend more time trying to make contacts in JT65 mode since that mode is more robust against noise than PSK31.

To do this I use the WSJT-X software under Ubuntu Linux. WSJT-X is written by Joe Taylor KJ1T. The Ubuntu hams packages had WSJT-X 1.1 and I frequently ran across the problem that it crashes when the Internet connection to pskreporter is impossible when sending spots. In my setup the Internet connection drops regularly when I'm active with JT65 or PSK31 so that was an annoyance. Logged as Ubuntu bug #1673040: wsjtx crashes when internet connection is interrupted.

But this weekend I was listening to Linux in the Ham Shack Episode #184 and in the presenters talking about re-installing a Linux system for amateur radio I heard two words: wsjtx ppa. As soon as possible I looked it up and found WSJTX General Availability Release PPA, followed the installation instructions and upgraded to WSJT-X 1.7.

The main improvement is that it decodes better so I may make further contacts. Sofar it hasn't crashed on an interrupted Internet connection.

I see one problem: it doesn't like talking to my radio via rigctld, giving an error. When I stop rigctld as started by Cqrlog and let WSJT-X control the radio directly via hamlib things work fine. And suddenly Cqrlog sees the QSO in progress and logs it when done.

Tags: , , ,
2015-07-24 Less flash but still playable audio 2 years ago
I like to sometimes add audio to items here on my homepage. In a format accessible for anyone with both download and play in browser options. Until now this was done using a flash-based player but lately flash has not been the secure option.

With the latest browsers it is quite possible to have an html5 audio player, but to keep it accessible for every visitor I also want to keep the flash audio player available. So I looked up how to do that and found Using HTML5 audio and video.

The linked audio is also available as attachments to the homepage RSS feed which is the standard for podcast feeds but since the recordings of satellite passes don't have an audio explanation or introduction they are not very usable as a podcast feed.

Tags: , , ,
2013-06-30 (#) 4 years ago
The whole podcasting movement seems to be over its top. Podcasting had a start in 2004. Several sources mention Audible revolution - Ben Hammersley - The Guardian as the first mention in "mainstream media" and the start of growth of the phenomena.

According to the article about Podcasting in the Dutch wikipedia the peak of hobbyist podcasts was in 2005, and by 2008 most podcasts were (semi-)professional recordings of radio shows. In 2005 I already noticed a lot of the podcasts that were easy on the ears were made by radio professionals. Adam Curry (Daily Source Code, sometimes still available via curry.com, but Adam is still very active with other podcasts), Father Roderick (Catholic Insider, still running), Luuk Ikink (Luukspod, not podcasting but active on Dutch radio) other podcasters I listened to back then were all trained in media.

Hobby podcasting is a lot less than in 2005. Sites with podcast listings are inactive, forums are sleeping or more about low-budget radio than specific about podcasting. But some are still alive and kicking!

Tags: ,
2013-01-22 (#) 4 years ago
One of my favourite podcasts, Chub Creek switched to m4a audio files and those don't play on my iRiver ifp-795 mp3 player which means I don't get around to listening to them. Open source and some scripting to the rescue can fix this, I found some good hints at .m4a to .mp3 - Linuxquestions wiki and tried them.
koos@thompson:/scratch/mp3/podcast$ faad CC125.m4a 
..
CC125.m4a file info:

LC AAC  2934.618 secs, 2 ch, 44100 Hz

writer: Dave
title: CC125
artist: Dave
album: Chub Creek
tool: GarageBand 6.0.5
..
Decoding CC125.m4a took: 22.10 sec. 132.79x real-time.
And the next step is easy:
koos@thompson:/scratch/mp3/podcast$ lame -q 5 -b 128 --tt 'Chub Creek 125' --ta 'Dave' --tl 'Chub Creek' --add-id3v2 CC125.wav CC125.mp3
LAME 3.98.2 32bits (http://www.mp3dev.org/)
CPU features: MMX (ASM used), SSE (ASM used), SSE2
Using polyphase lowpass filter, transition band: 16538 Hz - 17071 Hz
Encoding CC125.wav to CC125.mp3
Encoding as 44.1 kHz j-stereo MPEG-1 Layer III (11x) 128 kbps qval=5
    Frame          |  CPU time/estim | REAL time/estim | play/CPU |    ETA 
112452/112452(100%)|    2:55/    2:55|    2:55/    2:55|   16.785x|    0:00 
-------------------------------------------------------------------------------
   kbps        LR    MS  %     long switch short %
  128.0        2.3  97.7        91.0   4.9   4.1
Writing LAME Tag...done
ReplayGain: -3.1dB
Good way to warm up the CPUs on the computer: I can see from the 'sensors' output on which core the calculations are running. With two cores, running two processes like these parallel works fine.

Tags: , ,
2012-06-14 (#) 5 years ago
Another Dutch language lesson was used in Chub Creek 102 - Angry Birds.

I like making short audio things like this, so I plan on keeping the Dutch language lessons coming.
Listen to audio attachment:
MP3 media: Dutch language lesson 6 for Chub Creek (rightclick, select save-as to download)

Tags: ,
2012-05-22 (#) 5 years ago
My "Dutch language lesson" was used in Chub Creek episode 100 (mentioned before). So here is the original of the language lesson, it's a simple language lesson this time: just the word "winkel" (shop).
Listen to audio attachment:
MP3 media: Dutch language lesson 5 for Chub Creek (rightclick, select save-as to download)

Tags: ,
2012-05-20 (#) 5 years ago
Recently I've been doing some audio recording again for Chub Creek and this does scratch an age-old itch of me: making radio. The first audio cassette I made is filled with a "radio show" I taped with friends at primary school, when I was 9 or 10 years old. I need to digitize that tape and hope I can recover some of that. This itch for 'making radio' comes back from time to time, and the whole podcasting movement was a trigger to look closely again, with the options for recording and editing sound now available to anyone with a computer with a decent sound card.

So I try to find time to record some audio. And I bought some equipment to help record: first a Sennheiser headset with microphone. Later a Behringer Podcastudio with microphone, mixer, headphones and usb audio interface which also helps digitize my audio cassettes. A simple microphone arm was added to help the microphone being in the right place for me. And a microphone pop filter because the dynamic microphone needs me to be quite close and I want to avoid too much breathing and plopping noises.

I do look at nicer equipment from time to time (studio microphone with shockmount, small microphone with cover to record outside, more channels mixer..) but I intent to not invest in audio equipment until I feel more comfortable recording my own voice. That is one issue I have, I start to talk too fast and stumble over my own words when the recording is running. Which is where I need to learn how much I need to write down. Complete scripts word-for-word result in too fast speaking. Writing down nothing results in too much uh and eh or completely losing the idea of what I was going to tell. So, the right amount of script is still to be determined. And I need to practice, which is why I try to get more involved in podcasts and other recording projects.

Tags: ,
2012-05-15 (#) 5 years ago
It's Chub Creek episode number 100! Congratulations on making it to a round one hundred! Lots of memories from Chub Creek past. Ed and Ethel show up! Darkspeed tries the future of coffee... And yes, I'm in it too, with another Dutch language lesson.

Chub Creek 100 - A Tale of Two Creeks

Tags: ,
2012-04-30 (#) 5 years ago
The dink is back! New episodes of Chub Creek, my favourite Canadian podcast!

Tags: ,
2011-05-10 (#) 6 years ago
Zojuist gepost in xs4all.general naar aanleiding van shortiezzz: Nieuwe column over hoe topprovider XS4ALL mij de afgelopen dagen bruuskeerde en dupeerde. Zie: www.GoHansBrinker.com. Waar John Piek beschrijft hoe de xs4all podcast dienst ineens opgeheven bleek te zijn:
Subject: podcast.xs4all.nl opgeheven: communicatie 0
Newsgroups: xs4all.general

Blijkbaar is podcast.xs4all.nl opgeheven. Nu had ik daar ooit een account
op aangemaakt 'om eens te proberen' maar nooit echt iets mee gedaan, dus
geen ramp voor mij.

Maar de vermoedelijk grootste gebruiker wist ook van niks, zie
http://www.gohansbrinker.com/

Wat me vooral tegenvalt van xs4all is de communicatie: afwezig. Nergens een
aankondiging, geen optie voor gebruikers om eventueel hun content veilig te
stellen als ze die niet meer op andere plekken hadden.

Ja, het was een experimentele dienst. Maar dan nog kan je het netter
afsluiten dan 'oh ja het staat nu uit'.

                                               Koos
Ik moet een beetje denken aan de rants van Jason Scott over het einde van Geocities en andere Yahoo diensten. Alleen hadden hierbij mensen helemaal geen kans om hun content eventueel veilig te stellen of op tijd te melden dat ze ergens anders gingen hosten.

Voor de zoekenden: de shorties FM rss feed woont nu op http://podcast.shorties.nl/rss.xml.

Tags: , ,
2011-03-20 (#) 6 years ago
I recorded a podcast narrating an experiment in telephony and blueboxing.

Via the blog linked to the history of phone phreaking I found about an audio art project dedicated to Joybubbles, one of the oldest phone phreaks. This audio art is available in style, via the telephone. On a phone number in New York city: country code 1, number 718-362-9578.

I can call this as an international call, which will cost me, but with the current competition on prices for phone calls that isn't too big a deal.

But there is a better way. More in style. Combining the modern technology of Voice over IP with old-school phone phreaking.

Listen to me setting up the call via voip and ProjectMF in the US and blueboxing it from there to New York. But with permission from the owner of ProjectMF.

Websites mentioned in this podcast:

Yes, quality of the recording isn't great. The setup with a speakerphone generates lots of echo. And I need to work on my presentation.
Listen to audio attachment:
MP3 media: Telephony and blueboxing (rightclick, select save-as to download)

Tags: , , ,
2011-03-03 (#) 6 years ago
I tested saving all traffic from a SIP phone using tcpdump and extracting the audio using wireshark. This works fine, which means I can record a call for a podcast project I'm working on (writing the script, working on technical details). Watch this space for updates...

Tags: , ,
2010-11-04 (#) 6 years ago
And I promised the no-bed version too of Dutch language lesson #4. All audio editing and mixing done with audacity.

Audio credits for this version:

Listen to audio attachment:
MP3 media: Dutch language lesson 4 (nobed version) (rightclick, select save-as to download)

Tags: ,
2010-11-03 (#) 6 years ago
My previous remarks about doing audio work and one system reinstalled with audio editing in mind had a good reason: I was working on audio for a podcast. Not my own, but a guest role in "First Life" with a Dutch language lesson. I numbered it number 4 because there may or may not have been 3 earlier lessons used in the Chub Creek podcast.

But after I recorded my stuff I never heard anything about it being actually used. As you can see the First Life podcast is on long hiatus so I guess it isn't working out.

So here is what I recorded. It's available in two versions, one with the music bed and one without as I'm still not too happy about the effect of the music bed.

A music bed is the background music (usually something light drum-like) you hear on the radio when the DJ is talking (or when the DJ takes a breath). US definitions of music bed (and english wikipedia) seem to focus more on use of music in the background of radio commercials.

Audio credits:
Listen to audio attachment:
MP3 media: Dutch language lesson 4 (rightclick, select save-as to download)

Tags: ,
2010-09-26 (#) 6 years ago
In the news: VoIP hacker sentenced to 10 years - The Register and Hacker Gets 10 Years for $1.4 Million Internet Theft - BusinessWeek. From the businessweek article:
Pena was an unauthorized wholesaler of Internet-based phone services who sold more than 10 million minutes at deep discounts to customers, he admitted when he pleaded guilty. He hacked into computer networks such as one owned by IDT, a Newark-based telecommunications company, to route customer calls, he said.
These damages from VoIP fraud make me think there is probably a lot more fraud and resulting damages in those regular SIP scans I notice in the Asterisk server logs.

Secure those servers, audit the logs, set limits for your costs. VoIP infrastructure is a target for attacks and fraud.

Also sent as audio comment to Blue Box VoIP security podcast.
Listen to audio attachment:
MP3 media: Audio comment: Edwin Andres Pena sentencing (rightclick, select save-as to download)

Tags: , , , ,
2010-09-24 (#) 7 years ago
Did some audio work. Wrote a script, recorded the voice and did work on it with audacity, adding a few sound effects from www.freesound.org and used a drum loop from Free-Loops.com.

With the microphone, mixer and USB audio interface I have from the Behringer podcastudio (what a nice composed word) it is quite easy to record my voice (and other audio) in audacity in a good quality (at least when I do not have a cold..).

But adding the drum loop as 'music bed' (music you hear in the background when for example a DJ talks) was harder. It's easy to play with effects and such but the right timing of the envelope changes (changing the volume) in such a music bed is harder, especially when you move other sound effects in time. Searching suggests audacity isn't ideal for this kind of work, but at the moment I can't beat the price of audacity: free! For what I do with audio, that will have to do for now. Just leave room for volume changes in the bed and do it as the last thing when the timing of the rest is good.

Tags: ,
2010-05-11 (#) 7 years ago
Onderweg op de ligfiets geluisterd naar de podcast met de registratie van de nederlandse d-star ronde van de dinsdagavond ervoor. Van die dingen waar je alleen onderweg aan toekomt. Ik was nogal huiverig om op de ligfiets oordopjes in te doen omdat ik het idee heb dat ik meer op gehoor rij dan op een rechtopfiets. Maar op een uiterst bekende route die ik ook bijna slapend kan rijden en waar ik ook weet waar de lastige plekken zitten is het risico minder groot. Ik heb geen gevoel onderweg gehad dat ik ineens in een gevaarlijke situatie zat. Zo naar amateur radio luisteren doet me wel afvragen of er misschien ook amateur radio rondes zijn in de ochtendspits en avondspits. Ik heb gehoord van Mike Andrews W5EGO dat er in Kansas zo een ronde is op werkdagen. Dat is natuurlijk wel de ultieme versie van 'drivetime radio'.

Tags: , , ,
2008-03-10 (#) 9 years ago
I downloaded Adam Curry's Daily Source Code #732 where he mentioned phonecaster.de (german site). Phonecaster.de links phone numbers with podcasts, playing (by default) the most recent episode of a podcast when you dial the linked number. According to the phonecaster technical faq the service uses Asterisk. Sounds a lot like an upscaled version of my bel een podcast project (dutch).

Tags: , ,
  Older news items for tag podcasting ⇒
, reachable as koos+website@idefix.net. PGP encrypted e-mail preferred.

PGP key 5BA9 368B E6F3 34E4 local copy PGP key 5BA9 368B E6F3 34E4 via keyservers pgp key statistics for 0x5BA9368BE6F334E4 Koos van den Hout
RSS
Other webprojects: Camp Wireless, wireless Internet access at campsites, The Virtual Bookcase, book reviews, Weather maps