Radio Waves: Stories Making Waves in the World of Radio

Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Stefano Rampazzo, David Iurescia, and Paul for the following tips:

SWLtools App for the Belka receiver

Many thanks to SWLing Post contributor, Stefano, who writes:

I am a proud owner of a Belka receiver and I really love it.

The Belka is small, it is simple, it works very well outdoors with its short antenna that outperforms my desktop receivers with long wire antennas

Its size allows you to put it in your pocket, take it on a trip, on vacation, anywhere.
I have often sat in my garden at night with my Belka, away from the electrical noise of the house, and made some really good listening. In these situations I realized that I needed to record my dx. I thought about buying a mini-recorder, but since I always have my iPhone with me I decided to develop an app to record the audio of my Belka. After some time I am happy to let you know that my new app SWLtools is available on the Apple AppStore.

SWLtools allows you to record, play back and share your best listening. Also, since Belka also has an additional output where the IQ signal is present, I also added a function to the app to display the spectrum and spectrogram (waterfall).

As you know, modern smartphones do not have analog inputs and outputs, so to use SWLtools it is mandatory to have a USB audio device.

I bought a cheap USB dongle with a line input and output. Its sampling rate is 44.1 kHz, it is very low, but it is enough for minimal viewing.

SWLtools is available for free on the Apple AppStore (and it is also ad-free).

DAB+ receivers to be woken up in crisis situations (World DAB)

From next year, new DAB+ receivers will have better audio and text alerts in crisis situations. The current standard for alerts is called AAS (Alarm Annoucement Switching) and was introduced in 2020. In a crisis situation, receivers will switch to the station responsible for crisis information and the screen will also provide short text information. DAB+ also allows for the creation of temporary radio channels in crisis situations, which was used during the Brisbane floods in 2011. Over the past two years, the new Automatic Safety Alert (ASA) standard has been developed by WorldDAB and Digitalradio Deutschland in co-operation with chip manufacturer Frontier Smart Technologies and electronics manufacturers such as Technisat and JVC Kenwood. Among other things, receivers with ASA can be switched on automatically in emergency situations.

Click here to check out this note and more at World DAB.

Rti to launch Arabic podcasts on September 30 (RTI)

On Wednesday, Radio Taiwan International announced that it will launch its new Arabic podcasts on International Podcast Day on September 30 at the 2024 Rti Arabic Day Forum.

Rti’s president Chang Jui-Chang (???), speaking at the event titled “Rti Arabic Day: Taiwan Steps into the Arab World – Taiwan-Arab Cultural Exchange Forum,” remarked on the historical context of Rti’s Arabic programming, which began in 1950 but was halted in 2005 due to budget constraints. It was only on Eid al-Fitr in May 2021 that Rti re-initiated its outreach to Arab audiences through social media, achieving significant success over the past three years.

The forum featured several experts, including Representative Mr. Adel Fahad Althaidi of the Saudi Arabian Trade Office in Taipei, Scholar Ouyang Wen-chin (????), Assistant Professor Tsung Pei-chen (???), Lecturer Fu Yi-hsuang (???) from National Chengchi University’s Arabic Department, and former Associate Professor Hsu Cheng-hsiang (???). Fu highlighted that Taiwanese cinema serves as a window for the Arab world to understand Taiwan, noting the frequent cultural festivals, such as film, music, and dance festivals hosted abroad by the Ministry of Foreign Affairs to promote cultural exchange. [Continue reading…]

Rearchiving 2 million hours of digital radio, a comprehensive process (National Library – Norway)

The National Library is in the process of a major overhaul of its 2007 bit-repository, replacing it with a contemporary digital preservation system. This new solution is based on an in-house developed system called DPS (Digital Preservation Services), which uses IBM-HPSS as the underlying bit repository for data storage. This transition, which is expected to span over a couple of years, is necessary to ensure the long-term preservation and accessibility of the National Library’s digital collection.

Transition to a New Preservation Solution
In 2023, all new data archiving was transferred to the new DPS preservation solution. At this time, the old bit repository contained over 14 Petabytes of digitized and legally deposited historical material, which needs to be re-archived into DPS. A key part of this process involves analyzing and repackaging the historical data to meet the new DPS requirements.

Historical Legally Deposited Radio
Among the materials to be re-archived are 2.2 million hours of digital radio, equivalent to 2.5 million files and a total of 1 Petabyte of data. This includes both born-digital and digitized radio programs from the period 1993-2022.

In 1993, there were four radio channels delivering 16,500 hours of radio. By 2022, the number of radio channels had increased to 30, collectively delivering 150,000 hours of radio. With the phasing out of the old bit repository, it became necessary to move this data to the new preservation solution.

DSM to DPS: A Thorough Process
DSM (Digital Longterm Storage) has been the National Library’s internal management system for legally deposited radio for the past 20 years. The data has been stored in an Oracle HSM bit-repository in three instances (disk, tape, tape), and the radio material was fetched daily from various broadcasters. Some radio broadcasts were stored as mp3 and wav files, with accompanying checksum files. Other broadcasts were only stored as mp3. [Continue reading on the National Library blog…]