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Hacker Public Radio

Your ideas, projects, opinions - podcasted.

New episodes Monday through Friday.



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Host ID: 191

Stephen Ward, a Brit in Croatia. Accidental specialist subject: Internet Radio.

More info at

episodes: 9

hpr1583 :: Podcast Generator

Released on 2014-08-27 under a CC-BY-SA license.

Podcast Generator - Software which can host your podcast and generate all the RSS feeds.

Blue Drava Podcast - a little show I'm working on, hosted using the software.

hpr1243 :: Wargames Anniversary

Released on 2013-05-08 under a CC-BY-SA license.

Wargames is 30 years old, this is my tribute to one of my favourite films.
Some text taken from Wikipedia page for the film CC-BY-SA
Modem sound from Freesound user joedeshon CC-BY

hpr1166 :: Airtime Radio Automation

Released on 2013-01-21 under a CC-BY-SA license.

In this episode I talk about Airtime radio automation software.

Links: Airtime main site:

Airtime Demo instance to see what it looks and feels like:

Check my previous episodes for other Internet Radio topics.

Contact me at

hpr1147 :: Eulogy for the Netbook

Released on 2012-12-25 under a CC-BY-SA license.

In this episode I talk about my first netbook and the sadness that comes from knowing the tablet has replaced it.

No music for this somber affair. Contact me at

hpr1118 :: My First Brush With FLOSS: Doom

Released on 2012-11-14 under a CC-BY-SA license.

NB: Normal Priority. Not intended as a series, I just liked the pun! (Perhaps others could use the "brush with Floss" title for other subjects.)

Show Notes:

In this episode I talk about the open sourcing of the game engine behind Doom and it's legacy.

Useful Links:

Source ports I mention:

The music was by Tyler "Picklehammer" Pantella for the Freedoom project.

hpr1110 :: The Doctor Who Restoration Team

Released on 2012-11-02 under a CC-BY-SA license.

In this episode I talk about the team of people behind the restoration of old Doctor Who episodes and some of the techniques used to make 40 year old telly look as good as new.

The team's website with lots of in depth info:

Some Wikipedia pages with more info:

Music was me messing about with Zynaddsubfx and a USB MIDI keyboard. Sounded a bit like 80s Who. Contact me at

hpr1023 :: About Rivendell with Rivendell

Released on 2012-07-04 under a CC-BY-SA license.


About Rivendell with Rivendell

In this episode I talk about the Rivendell Radio Automation software whilst using the same software to play music and sound. This show was recorded "as live" and unscripted. I need a bit more practise as I'd like to use a similar setup to do my own podcast show. Did a bit of normalising and amplifing as the levels weren't that great (another thing to practise)

Links and CC attribution follow.

[00:00] SFX CinematicBoomNorm.wav by Herbert Boland CC-BY

[00:36] Promo Rivendell Audio Spot -- "$15,000"

[00:47] Bed Music Emptiness by Alexander Blu CC-BY-SA

[01:00] Link Rivendell Radio Automation

[03:29] Music There's Something Wrong by Brad Sucks CC-BY-SA

[07:30] Link Installing Rivendell - From the Rivendell Wiki, lists some live cds

[10:20] Link My Blog post on installing Rivendell in Ubuntu 12.04

[15:10] Link alsa_in and alsa_out - Very useful if you have a USB headset

[17:22] Music Delirante planete by Löhstana David CC-BY

[22:06] Promo Rivendell Audio Spot -- "Rock Steady"

[21:14] Bed Music May by Alexander Blu CC-BY-SA

[21:42] Link Screenshot of RDAirplay from Rivendell site

Gallery of screenshots here

[25:23] grenade.wav by ljudman CC-Sampling+

[25:53] Storm by RHumphries CC-BY

[27:27] Promo Rivendell Audio Spot -- "Never Pay"

[34:28] Fly Away by Tanya T6 CC-BY-SA

[42:34] Note Odd thing happened, I thought the bed music had bypassed the recording when in fact it had just bypassed the mixer so it played full volume. Again, more practice needed.

Stuff I forgot to mention: Talking about multiple tracks in Carts, you can set each track to only play under certain conditions, such as time or day of the week. RDPanel is an appilcation which is a large version of the sound panel in RDAirplay, great to have on a second monitor. Logs are playlists which can be saved and loaded an can be generated just by playing music in Airplay or building them manually in RDLogedit or automatically with RDLogManager. Rivendell can manage more than one radio station if needed and share the same DB.

hpr0845 :: Open Source Radio Software

Released on 2011-10-27 under a CC-BY-SA license.

In todays show AukonDK leads us on a tour of Open Source Radio Software

Icecast, the project, is a collection of programs and libraries for streaming audio over the Internet. This includes:

  • icecast, a program that streams audio data to listeners
  • libshout, a library for communicating with Icecast servers
  • IceS, a program that sends audio data to Icecast servers

butt (broadcast using this tool) is an easy to use, multi OS streaming tool.
It supports ShoutCast and IceCast.
butt runs on Linux, MacOS and Windows.


Internet DJ Console is a project started in March 2005 to provide a powerful yet easy to use source-client for individuals interested in streaming live radio shows over the Internet using Shoutcast or Icecast servers.

Because of the large number of streaming applications that already existed but did little more than stream a pair of audio channels or a fixed playlist, it was decided that IDJC would be the opposite and simulate audio hardware to cut down the expense of creating a home studio.

In addition to providing a large number of show production features, this software has been written with the aim of producing the best possible experience for the listeners and DJ alike. To that end features like VoIP integration were conceived of from the very start resulting in the choice of Jack Audio Connection Kit to base the audio.

This has afforded IDJC audio processing capabilities that were they built in would be considered excessive. Enjoy integration with powerful programs such as the well known Skype, Jack Rack (offering audio sound effects plugins), Jamin (the powerful audio compressor/equalizer), and many more.

Fortunately IDJCs power does not come at the expense of a well organized user interface, nor have requests for features been permitted to diminish the application's intuitive feel yet throughout development the main goals have always been that of stability and audio quality.


Liquidsoap is a powerful and flexible language for describing your streams. It offers a rich collection of operators that you can combine at will, giving you more power than you need for creating or transforming streams. But liquidsoap is still very light and easy to use, in the Unix tradition of simple strong components working together.


Airtime is the open radio software for scheduling and remote station management. Remote access to the station’s media management, multi-file upload and automatic metadata verification is coupled with a collaborative online scheduling calendar and playlist management. The scheduling calendar is managed through an easy-to-use web-interface and triggers audio playout with sub-second precision for fading.

Rivendell is a complete radio broadcast automation solution, with facilities for the acquisition, management, scheduling and playout of audio content. It has all of the features one would expect in a modern, fully-fledged radio automation system, including support for both PCM and MPEG audio encoding, full voicetracking and log customization as well as support for a wide variety of third party software and hardware. As a robust, functionally complete digital audio system for broadcast radio applications, Rivendell uses industry standard components like the GNU/Linux Operating System, the AudioScience HPI Driver Architecture and the MySQL Database Engine. Rivendell is available under the GNU Public License.


Rivendell Radio Automation Live CD installer for Ubuntu. This is a modified version of Ubuntu 10.04. It has been customised using the Ubuntu Customization Kit (UCK) and the Rivendell DEB packages developed by Alban in France.

Frederick Henderson created all the install scripts for the greatly improved installer

Twitter/Identica: aukondk

hpr0817 :: Installing Linux and Windows 7 to a USB Hard Drive

Released on 2011-09-19 under a CC-BY-SA license.

Script to install Windows to USB described in forum post here:

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